RS775 Gearboxes
 

It seems strange that banebots wouldn't have these available by now.

I'm looking to use four S775 to lift a ten pound arm thats about 60 inches long. Is this overkill, or would it allow me to maximize the speed of raising and lowering the arm?

Any suggestions for a gear ratio/gearbox and where I might be able to get it? The goal is to turn all four output shafts from the banebots motors into a single pivot to move the arm.

Thks in advance!

Re: RS775 Gearboxes
 

I conacted Banebots about this and they said they expect them to be up Monday or Tuesday.

I think 4 will be complete overkill. Our calculations allow us to lift an arm double the size and weight (i.e. 4x torque), running them at only 1/4 of their stall torque with just 2 motors.

Re: RS775 Gearboxes
 

4 is complete overkill. They're roughly 240W motors if I recall correctly - think the equivalent of a 2010 FP motor.

Re: RS775 Gearboxes
 

I think we're going to get away with one for our lift...

Then again, we might just use the FP.

Re: RS775 Gearboxes
 

Thanks for the fast responses. If I go for two RS775, what typ of gear ratios should I be looking for? It will be a parallel lift with a diagonal surgical tubing assist. I'm looking to making the arm raise and lower as quickly as possible without worrying about the motors not being able to handle it.

Re: RS775 Gearboxes
 

~390 if I did my math correctly; ~(voltage)*(stall current)/4 = (12)*(130)/4 = 390 (not factoring in motor inefficiency)

Also, the 2010 FPs had roughly 190w. This year's have 290w. (Both figures from the FIRST motor curves)


The reduction we're going with is a 512:1 (256:1 with banebots gearbox, and then 2:1 with sprocket). This gives us ~576 lb-ft of torque if you go with 65% gearbox efficiency, which is more than enough to lift it, while we still have 25RPM, which is 150deg/s.

Re: RS775 Gearboxes
 

I think you took the stall current at 18 volts instead of 12 volts.

Re: RS775 Gearboxes
 

DON'T DO THIS. That is, unless you've carefully considered the following.

Banebots suggests a maximum torque output of 85 ft-lbs for the P80 CIM gearbox. If your mechanism is actually going to require anything close to 576 ft-lbs of torque, you'd destroy a P80 gearbox rather quickly. And P80s are tougher than the P60, which is smaller with an aluminum ring gear. BB doesn't list the max recommended torque for the P60s, but it's going to be less. At least half, possibly a quarter. So I strongly urge you to look at the maximum safe output of your gearbox and make sure you plan your gear reductions accordingly. You may want to decrease the reduction in your gearbox and add an additional reduction stage of sprockets. 256:1 gear reductions provide surprisingly little torque once the gears have failed.

Re: RS775 Gearboxes
 

I was under the impression that the P60s were counterintuitively stronger than the P80s. If the P60s can output less than 85 ft-lbs of torque, they're pretty much completely useless to me.

Re: RS775 Gearboxes
 

Remember - if you have a 15 lb end effector at 4 feet from your pivot, that's 60 ft-lbs. If you then have a 2:1 sprocket and chain reduction leading into your P-60, then it will never seen more than 30 ft-lbs of torque statically. Dynamically is dependent on the speed you move it of course.

Re: RS775 Gearboxes
 

Yeah - this is what happens when you do math in inch pounds and are too tired to remember to convert. The gearboxes should be fine for me.

Re: RS775 Gearboxes
 

Thanks for letting us know. We will probably switch to a 128:1 planetary and 4:1 sprocket in that case. At most we would need 130 lb-ft of torque to turn the arm. With 4:1 that means the gearbox should only need to put out 32.5 lb-ft of torque. That should be fine I think, but I'll ask Banebots if they have that info on the P60s.

Re: RS775 Gearboxes
 

Be sure not to just model for torque but for speed as well. An arm that rotates 180 degrees in 1 second is not very useful.

Re: RS775 Gearboxes
 

Spoke to Banebots Tech in the morning, he listened to my calculations and things but he couldn't comment on the specific torque info on their gearboxes. They do not have that data available. Do your calculations and leave room for unexpected loss. The RS-550 has a Stall Torque of 4.4in-lbs., I am planning on 1.1in-lbs in my calculations, if free speed is 19300RPM, then you need to subtract from that # 25% because of the 1.1in-lbs 25% of the Stall Torque, then the motor will run at 15000RPM at 75%.,

Re: RS775 Gearboxes
 

Based on our prototyping, watching some old 2007 videos, and current consensus on design, we've found that speed close to optimal. Of course, it's only week 2, and there's a lot more testing to do, so our plans may change quickly.

Re: RS775 Gearboxes
 

Sanity check: Strap a five pound weight on the end of a 2x4 and swing that from a pivot point about five feet from the end 180 degrees in a second.

Then try to precisely place a tube on a rack with that rotation rate.

I haven't done it, so maybe I'm talking out of my butt here... but that seems pretty darn fast! ::safety::

Re: RS775 Gearboxes
 

What's wrong with 180 degrees in one second in this game (specifically)? You have half (or all) of the field to drive before you are in position to score, after all!

Re: RS775 Gearboxes
 

I guess I haven't been clear enough. We probably will be going with something slower for human control (as I said, week 2 just started, lots of testing to do still), I don't know of many people who would be able to control something that fast.

Re: RS775 Gearboxes
 

It's far too fast to be easy to control, in my opinion. Most arms have about 90-100 degrees of travel. I"m thinking 45 degrees per second is much more reasonable.

Re: RS775 Gearboxes
 

With some degree of automation (PID, specifically) and the proper control systems, you could go with a much faster speed without losing much control.

Re: RS775 Gearboxes
 

Why, in the age of quadrature encoders and with targets at a set height, would you be subjecting your lifting arm to human control (beyond 'this is the height I want)?

Re: RS775 Gearboxes
 

Why subject your robot to a potential sensor failure when you can train a monkey (or a student, if monkeys are lacking) to put the tube at the right height every time?

Re: RS775 Gearboxes
 

Because I trust software about as far as I can throw it, and since it has almost no mass, I can't throw it very far. :)

I know there are a lot of great programmers in FIRST. I also know that teams are always pushed right up to a deadline, and the software teams get very little time to test. I also know a slow arm is a lot easier to stop, and if your arm is going 180 degrees/second and you miss a limit switch for some reason, something is going to break. There are a lot of great teams in 2007 that didn't actuate at anything close to 180 degrees/second. There probably are some that did too, but I'm a lot more comfortable with a slow arm that I can fall back on a human to control, than needing a relatively complex piece of software to control.

Why would you use an encoder? It is simpler to use a potentiometer since your are limited to probably less than one revolution, no?

Re: RS775 Gearboxes
 

A. Trimpots drift. Encoders don't.
B. The same idea could be replaced with "why do this in the age of the limit switch?" and the objection is the same (though with slightly different hardware and software, without quite so much elegance).
C. With 20 minutes of LabView training, I was able to bring an arm up to whatever height I wanted to by pushing the appropriate button.
D. If you haven't made things autonomous, then you can't score in autonomous...

Re: RS775 Gearboxes
 

Banebot just emailed me back:


Hello,

The new CIM-U-LATOR gearbox and P60 mount for the RS775s will be available for order Wednesday.

Thank you,

BaneBots Sales


Jason Law

Re: RS775 Gearboxes
 

On the BaneBots page, it says they'll be offering a 64:1 and a 256:1 for the 775. Really? Nothing in between those ratios?

Re: RS775 Gearboxes
 

Can you explain (in non-EE terms, preferably) how big of a problem this is in FRC style applications? In my six years of robot building we used potentiometers many times in the feedback loop for rotation, and many more times in our Operator Interface. We never had a problem, and none of my EE mentors ever mentioned it as a potential issue in our many hours of gremlin chasing. Did we dodge a bullet, or is this a case of "it only really matters when you're building spacecraft"? Thanks! :)

Re: RS775 Gearboxes
 

The one year we used a trimpot, we found drift values of 5-10%. At one point it drifted sufficiently so that it was still driving while stalled.

We were the "oooh, neat, fire!" robot that year.

Re: RS775 Gearboxes
 

I would imagine that they may be the only packages for the RS775 that they offer off the shelf, but in years past swapping motors between BB transmissions was just a matter of ensuring you have the correct Mounting Block for the Motor and series of Transmission - so you should be able to buy a P60 with the desired ratio and swap the mount, right?

Re: RS775 Gearboxes
 

Actually, on the planetary page for the P-60 for the RS-775, it says they have multiples of 4.

4:1, 16:1, 64:1, and 256:1.

Re: RS775 Gearboxes
 

What Tom said. Looks like they're initially only offering the 4:1 stages for the RS-775s. If the RS775 4:1 stages are identical to the RS-540 4:1 stages, then you could buy some of the 5:1 stages from the P60 Gearbox Parts pages and swap them in to make up your own ratios. I suspect they're not going to have a 5:1 pinion for the motor itself, so you'd be swapping in at the 2nd stage or later, which is a little less than ideal... But you'd still get the different ratios you're looking for. 4:5:4 = 81:1, 4:5:5 = 103:1, which gives you a few more options between 64 and 256. Granted that you still have the big jump up from 103 to 256, but unless BB comes out with some 3:1 stages, that's always gonna be a sizable jump.

Re: RS775 Gearboxes
 

RS775 18V Motors...... Before jumping to the motor with the larger number, check out the Motor Specs to each of the available Motors. In my eyes, that RS550 Motor in most ways is superior and now one of our fellow FIRST Team members spoke to Banebots this morning about the Availability of the different versions of the gearboxes for the RS775 Motor..... More options going with the lower motor. Plus more Torque.

Re: RS775 Gearboxes
 

Can you explain what you mean by this? From the specs I have, it looks like the RS 550 outputs 21 fewer Watts at peak power (266W vs. 245W). To me, this is strictly inferior (although not by much). Is there some other factor you are taking into account? I have also heard that because the motor is designed for 18V, it runs more reliably at 12.

We are considering using one RS 775 for each of the strafing wheels in our holonomic drivetrain. Will the load from a drivetrain be too much for these motors and the gearboxes on them? There seems to be some concern about max output torque. Would the RS 550 be a comparable alternative, in light of the greater availability of those gearboxes?

Re: RS775 Gearboxes
 

Plus more likely to catch fire under stall load!
I'll stick to the 775's and their greater robustness...

Re: RS775 Gearboxes
 

Which specs are you looking at when comparing those two motors? I see two conflicting sets of numbers when I look at the motor curves on the KOP website and then compare to the yellow BaneBots Motors page from the kit. The motor curves give lower numbers than the BaneBots sheet. Here is what that sheet lists for RS-775:
No Load: 13000 RPM, 1.8 A
Peak Efficiency: 119 W, 11360 RPM, 12.5 A, 14.2 oz-in.
Stall: 86.7 A, 110.8 oz-in.
Then you go to the site listed on the yellow sheet, www.banebots.com/M7-RS775-18, and you find a third set of numbers.

Does anybody know which numbers are right? The motor curve on FIRST seems wrong.

Re: RS775 Gearboxes
 

Seconded! RS-550's and FP's fail spectacularly under heavy loads. For the uninitiated, these motors have nice little plastic impeller fans to blow air across the coils and cool them. But the more you load them, the slower they turn, the hotter they get... This continues for a short while till you melt the little plastic fan. At that point, the motor's toast because it'll never be able to adequately cool itself. And that's assuming it hasn't managed to catch fire or short itself out before the breaker trips.

Re: RS775 Gearboxes
 

I am using the numbers from the Banebots site for the 18V motor, then bringing them down according to the Voltage difference, giving the performance at 12V.

These are:
Free Speed - 13000 rpm
Stall Torque - .7833 Nm
Stall Current - 86.67 A
Free Current - 1.8 A
for the 18V RS 775 running at 12V.

Re: RS775 Gearboxes
 

There was another thread about this, and banebots posted some official numbers for all the KOP motors, including the 775-18 running at 12V.

Re: RS775 Gearboxes
 

FIRST used the numbers for a different BB RS-775 motor that's specifically a 12V motor. The correct numbers and curve were posted by BB in a different thread:

http://banebots.com/docs/M7-RS775-18-AT12V.pdf

Re: RS775 Gearboxes
 

In 2007, 1075 built a multi-position pneumatically powered arm (a single cylinder drove it, under control of 3 air valves [supply valve, exhaust valve, and direction valve]) It was able to stop anywhere in its travel, and used PID control to stop where we wanted it to (at the three heights, plus the floor) using a potentiometer. It was FAST. I would not be at all surprised if it approached 180deg/sec. It never seemed in danger of tearing the robot apart, to me at least.

It did however have PID issues where it would oscillate around the set point occasionally, particularly if air pressure fell below 60psi and the valves stopped operating consistently.

It was a much-improved derivative of our 2004 off-season arm, which was also multi-position pneumatic, (and as far as I know, one of the earliest examples of multi-position pneumatics using KOP valves in FRC [at the time, you were restricted to using the valves that came in the KOP, which were standard single and double solenoid valves, without an 3rd setting to stop the cylinder])

Re: RS775 Gearboxes
 

My calculations show a 5 kg arm about 60" long with the weight distributed about 80% of the way down the length of the arm to be able to move 120 degrees in under 5 seconds with a single RS-775 and a 256 to 1 gear ratio. I was pretty careful, but these may be slightly off.

Re: RS775 Gearboxes
 

It is.

Re: RS775 Gearboxes
 

I don't know if anyone's seen this yet, but it appears that P60's for the RS-775 are now available for purchase via Banebot's website: http://banebots.com/c/P60K-S7

Nothing like delaying a product release and then saying there's a 5-10 day lead time...

Re: RS775 Gearboxes
 

Pretty frustrating to say the least.

We weren't planning on using the banebots gearboxes, but we have the means to help ourselves out on that front. I feel for teams that will be relying on banebots to interface with their motors. Having to wait 2 entire weeks (10 buisness days) for your gearboxes to arrive could be devastating.

-Brando

Re: RS775 Gearboxes
 

Humans fail far more often than sensors. Plus, humans react on the order of a few thousand times greater than a sensor.

Re: RS775 Gearboxes
 

Luckily, we placed our order early this morning, so I'm hoping we might beat the rush of teams that were waiting on the release of these gearboxes. It stinks that we don't really have the means to make something with a large enough reduction using a reasonable amount of space in house.

I'm planning on giving BB a call today when I get out of work, or a call tomorrow morning just to follow up on our Order and get a better estimation of the lead time. I'm really hoping that BB is saying "5-10 days" just to cover themselves should 200 orders be placed in one day. Guess it's just time to wait and pray.

Re: RS775 Gearboxes
 

Yeah hopefully they are doing that, however anyone can throw out lead times like that to cover themselves, but that's a place I will always be cautious about getting parts on time from. I will just take a "wait and see" outlook until I start hearing from teams on actual timing.

-Brando

Re: RS775 Gearboxes
 

I'll try and report back with whatever news I get as soon as I get it.

Banebots has posted that the P60 transmissions aren't recommended to output more than 35-ft lbs of torque. Anyone who's looking at purchasing either the 64:1 or the 256:1 Transmission should be aware that it is theoretically possible to exceed this torque with an RS775 (I would assume 500 series motors as well, but I haven't run the numbers) at Full Stall so design accordingly...

Re: RS775 Gearboxes
 

Has anybody else noticed that the RS775 gearboxes will now be postponed until "mid February?"

This will obviously not work for most teams. What are the alternatives? The bane bots motors are practically useless without gearboxes.

Re: RS775 Gearboxes
 

The 4:1. 16:1. 64:1, and 256:1 are available now. The Mid-February Date seems to pertain to Custom Ratios and Gearboxes.

According to BB's Site:

Re: RS775 Gearboxes
 

Hi, thanks for the reply. I just noticed that myself.

Re: RS775 Gearboxes
 

696 put in an order for some P60s on Wednesday night. We'll see when they arrive.

Does anyone know what the first part to fail would be in the 4-stage P60? Is it worth upgrading to the steel ring gear, or would something else go first? I'm wondering if the steel ring gear would keep it alive a little beyond 35 ft-lbs.

I don't yet have any first-hand experience with these gearboxes.

Re: RS775 Gearboxes
 

To the teams that have been doing FIRST for a while: the drill gearboxes from 2000-2002 are a perfect fit for the RS775 motors - the mounting holes match exactly and you get to choose between a 20:1 or 64:1 reduction - you can even change gears, if you forget the pain it was to do that back in the day! ;)

The only modification needed is for the pinion: you either buy (remember PIC?), manufacture (EDM, most likely) or steal one. We went ungracious on the drill and took the 12 (?) teeth, 0.7 metric module pinion from an old one we had around. The drill motor shaft is 4 mm and the RS775' is 5 mm. The pinion is hardened, so we had to anneal it (real quick with a blow torch) in order to machine. May seem a lot of work, but it really took us about two hours from concept to fully-functioning product.

Re: RS775 Gearboxes
 

Has anyone received their 775-Series P60's yet? We have not, and I've been trying to Call Banebots but no one answers the phone...

Re: RS775 Gearboxes
 

On the 10 day maximum lead time to ship the P60 they gave my team, today is the 10th day. We haven't heard anything from BB, and we were planning on using a P60 with the 775 for our lift.

At this point we're seeking other options with a FP instead. :/

Re: RS775 Gearboxes
 

When was your order placed? Ours was placed 7am (MST-their time) on the 19th, so today would be the 7th/8th business day (Depends on if they're open Sat), so I'm expecting a shipment notification any day now.

Re: RS775 Gearboxes
 

We placed our order on the morning of the 14th I believe. That would be 10 business days ago. We haven't heard anything from BB as of yet.

EDIT: I'm thinking I may be wrong on the order date. I didn't place the order. Our lead mentor did, although in an email this morning he'd said our lead time was up.

Re: RS775 Gearboxes
 

In 2008 a 256:1 BB Gearbox failed on us (which I believe was the 2nd generation, the P60 is the third). We unknowingly ran it for a couple of seconds after it failed, but when we took it apart we had stripped almost all of the ring gear teeth on the final stage.

Re: RS775 Gearboxes
 

Oh man, what memories. That really takes me back. And yes, I do remember PIC-Design, the ONLY supplier for a matching gear, with some crazy lead time.

Anyway, great tip, although I'm not sure I'd trust those drill gearboxes in low gear. They tend to like to come apart.

On a similar note, anyone stick a 775 in a Dewalt gearbox yet?

Re: RS775 Gearboxes
 

Do you have a picture of the application/design, or at least some specifics of how it was used? Also, what metal was that ring gear?

Re: RS775 Gearboxes
 

Just got that email from BB.

Re: RS775 Gearboxes
 

Yes, it fits perfectly. I have yet to do serious load testing, but given that the dewalt can handle a CIM's torque, I think it'll do just fine with a 775.

Edit: it also tolerates the input of two FP motors with additional gearing down quite robustly.

Re: RS775 Gearboxes
 

So because the gearboxes are not a stock item available to all teams, does that mean they are illegal?

Re: RS775 Gearboxes
 

This is an interesting question. (I'm assuming you're referring to the Banebots Transmission - if not please ignore this.)

I believe that this would apply here:

The Gearboxes themselves, would fit the definition of a COTS item (definition omitted to keep the post length down) because they are a stock item and the current issue in question is the Processing and Shipping time for such parts. I believe the Shipping and Processing Time would fall under the definition of Vendor, Point C.

It seems that Banebots has been barraged with orders from various teams, thus adding to the longer lead times.

Then again, I'm not the Q&A but this is my interpretation.

Re: RS775 Gearboxes
 

They are legal. You can take the gearbox off of any off the shelf drill.

The banebots gearbox should be legal because you could have ordered it like all other teams.

Re: RS775 Gearboxes - alternative?
 

Banebots is now quoting "the longer end" of 10-15 business days lead time. Does anyone have suggestions for an alternative 256:1 (or similar) gearbox to interface with the RS-775? We just decided to order one yesterday, and can't afford to wait until ship day to see it for the first time.

Re: RS775 Gearboxes - alternative?
 

Dewalt transmission in low gear is 47:1, throw on a sprocket reduction of 5:1 or 6:1 and you'll be good to go, plus you'll have integrated anti-back drive.

Re: RS775 Gearboxes
 

Video

Yup. The lift that actuates as the robot drives around the corner was actuated in two parts. There is a stick (that you can clearly see) that pushed the four bar up about halfway, at which point the four bar itself was actuated by sprocket attached to the front right member of the four bar.

Both of these were actuated by 256:1 Banebots gearboxes. There was also some bungee cord that was used to alleviate some of the lifting from the gearboxes.

The BB that failed was the one that actuated the 2nd part of the lift. We were just doing our final tests on Thursday night when it stopped working. We heard some terrible grinding, removed the gearboxes and saw the failure. I don't believe we took any pictures of it (at any rate, I don't have them) but a large number of the teeth had failed and there were lots of former gear teeth that had been smashed into long fragments floating about in the grease.

Worth noting was that the output shaft was cantilevered, but the sprocket was as close as humanly possible to the gearbox. We installed another gearbox & added a bearing so it became simply supported, and we did not experience another failure (realistically around 100 actuations, which is in the neighborhood of the number on the one that failed).

I don't recall what the ring gear was made of, perhaps a search of CD might turn up something? I can't find much about the old motors on BaneBots site.

Re: RS775 Gearboxes
 

What other types of alternatives are there if the RS775's don't come in on time? I'm assuming most people are planning to use them to lift their arm, etc. Would two window motors be sufficient to lift a good sized single pivot arm?

Re: RS775 Gearboxes
 

the 550's through KOP FP gearboxes would be good!

Re: RS775 Gearboxes
 

I've always wanted to try to couple a motor to this thing http://www.harborfreight.com/torque-...ver-93645.html

However, when I played with it in the store, the input took a bit of torque to turn. Not sure if it was the type of grease inside, or poor quality leading to binding or what. Neat idea though.

Re: RS775 Gearboxes
 

How do you mate the FP pinion gear to the BB550 without the pinion gear slipping on the BB550 shaft? It's a press-fit onto the FP motors (even looks like there's axial scoring on the FP shaft and pinion gear), yet I can slide it onto the BB550 shafts with my fingers.

I've done my darndest to find the answer so we can order the appropriate gearboxes (or use our current AM-FP planetaries) with BB550's, yet we may also go down the BB775+Dewalt route.

Re: RS775 Gearboxes
 

You'd have to knurl the 550 shaft to press on the FP pinion I think.

I don't know why you'd want to do that given that the 2011 FP motor has a higher free speed and higher torque that the 550 and already has the pinion pressed onto it... :confused:

Edit: If memory serves the RS775 shaft would be big enough to drill out the FP pinion and use the RS775 in the FP gearbox, though drilling new mounting holes would be a PITB. Food for thought.

Re: RS775 Gearboxes
 

Got an e-mail from Banebots:

It appears that our P60's should ship sometime before or on Wednesday of next week.

I hope.

Re: RS775 Gearboxes
 

We're in the same boat... so very aggravating. I just hope their product is worth it.

Re: RS775 Gearboxes
 

The short story is, while I agree that the FP motor is powerful enough to power our lift system, our experience is (in effect) urging us to add another motor to it in order to balance the load (whereas we can only legally have 1 FP). We have terrible [luck?] experience in properly determining the motor loads. We'd really like to use 2 BB775's since they require less to gear down to our target 300 RPM, yet the BB550's already mate nicely with the AndyMark FP Planetary Gearboxes and (theoretically) require less machining (of which we have limited capabilities). We want to put either setup through an AM Toughbox due to cost (we already have it) and ease of mounting an encoder.

*goes of to look up knurling*

Re: RS775 Gearboxes
 

FWIW this is our plan right now, to use a DeWalt-mounted RS775 in combination with a P60 mounted RS775, with appropriate sprocket reductions to closely match speeds.

I would not hesitate to gang a 775+ dewalt with a FP+KoP transmission. I would also consider two 550s or 1 550 and 1 FP into a single DeWalt the same way AndyA and I did way back in 2005. It wound up with an approximately 400:1 reduction.

Re: RS775 Gearboxes
 

January 17 didn't count as a business day for many businesses.

Re: RS775 Gearboxes
 

I've found a few mentions on various forums of the 775s also fitting in these FP gearboxes. You need to find a 32DP pinion that matches the number of teeth of the pinion on this year's FP, Tower Hobbies is supposedly one potential source.

Re: RS775 Gearboxes
 

Well, we went and made the decision today. We've always been iffy on banebots - actually we haven't bought anything from then since the '07 debacle. We ordered our P-60 transmissions for our arm 10 business days ago, back when the "wait" period was supposed 3-5 days to ship. They have still not shipped.

An email to banebots Friday morning regarding order status went unanswered. I made 14 calls Friday during the day, and not one time did they answer the phone (no, I didn't leave a message).

Today we made the decision - we had a number of unmodified dewalts sitting on the shelf that are still legal, so we ordered the additional components, clamshells etc, and picked air freight. Dewalt says we'll have them by Tuesday.

If and when our banebots ever arrive we'll be RMA'ing them or selling them to another team who wants them.

Re: RS775 Gearboxes
 

I'm told we received an email today from BaneBots that our (2) P60 256:1 gearboxes will ship tomorrow.

Re: RS775 Gearboxes
 

For reference, when did you order them?

Re: RS775 Gearboxes
 

My team received an email from BB yesterday that our P60s had finally shipped, and should be at our shop by this Friday.

For reference, they were ordered on 1/17.

It seems that teams who ordered them early be receiving emails this week that their orders have shipped.

Re: RS775 Gearboxes
 

1/19

Re: RS775 Gearboxes
 

Did anyone try to find some original applications of these motors and use the gearboxes directly?
775 used in a drill

If indeed we find "applications" of these motors (as well as the rest of the Bane-Bots motors) embedded in products, perhaps that is the ticket to getting a motor/transmission that can be be immediately acquired and used?

Another commercial items that uses "BaneBots motors":
RS-550 used in a drill

Re: RS775 Gearboxes
 

I think as an off-season project we will work on different interfaces for Banebots motors, so that we never, ever, ever have to rely on them for planetary gearboxes ever again...

Re: RS775 Gearboxes
 

Good News, we received an E-Mail telling us that our order of 775 Series P60 Gearboxes are shipping today. For reference our order was placed on the morning of the 19th.

Re: RS775 Gearboxes
 

^Same with us, placed on the 19th, got the confirmation after lunch today. Finally...

Re: RS775 Gearboxes
 

This problem is pretty much "solved" already.

For low/no resource teams, a 550 is a drop in for the KOP FP gearbox.

For low resource teams, the 550 and 775 fit up to an AM planetary.

For any team, a custom spur gearbox could be easily made. The pinions are easily available at sdp-si, or just about ANY hobby shop (yes, they will carry a huge range of 3.2mm and 5mm bore 32DP pinions).

On that note, many RC car gearboxes would work, and be durable enough to run these motors; considering 550 and 775 motors are commonplace on them.

Re: RS775 Gearboxes
 

We are anxiously awaiting an email stating that our gearboxes have shipped. We're planning on machining our own custom output shafts and really need to know the exact dimensions of the shafts. I can't seem to find a detailed drawing anywhere. If anyone has already received their P60-775 and would be kind enough to give some details on it, they would be much appreciated.

Re: RS775 Gearboxes
 

We received notice that our CIM-U-LATORs have shipped. Hurray!

Re: RS775 Gearboxes
 

Would you let us know what day you ordered them to give us an idea when ours might ship?

Re: RS775 Gearboxes
 

As of right now, 10 business days seems accurate.

Those who ordered on the 17th had their orders shipped on the 31st, orders on the 18th shipped on the 1st and orders on the 19th were shipped yesterday the 2nd.

Re: RS775 Gearboxes
 

Here is another good gearbox option for teams scrapping for an option for a 775.

Re: RS775 Gearboxes
 

Can anyone tell me which AM planetary gearbox is compatible with the 775 banebot?

We are a low resource team that is desperate to find a compatible gearbox since Banebot has told us to not expect our gearbox until AFTER the robot's ship date!

Thanks!

Re: RS775 Gearboxes
 

There is no directly compatible gearbox, however with minimal modifications the Andymark Planetary that takes the fisher price can be made to work.

Re: RS775 Gearboxes
 

With a little bit of time you can do this:

FisherPrice Gearbox with RS775 Motor on it. Press the pinion off of the standard FP motor, drill/ream out to fit the RS775 shaft, press pinion onto RS775, and assemble.

http://www.chiefdelphi.com/media/photos/36278?

Re: RS775 Gearboxes
 

All:

Our CAD team has completed a model of the CIM-U-LATOR for those who need sizing info for design. See the attachment here: http://www.chiefdelphi.com/media/papers/2444

Jared

Re: RS775 Gearboxes
 

We put a banebot motor (500 series not the 775) in a dewalt trans, then used a 4 gear reduction to get 400:1 for the arm.

( now if only I could drill horizontally and level)

Re: RS775 Gearboxes
 

Careful...