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Unread 16-02-2011, 13:27
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Alternatives to Banebots transmissions.

Last night we found out that we will not be receiving our order from Banebots in time for shipping. This could potentially cripple our robot. We have designed and built our robot's arm to be driven by the RS550 with a 64:1 P60 transmission and a 4.125 chain reduction. Without the transmission being available, we are now looking for solid alternatives.

Option #1: Purchase a FP Planetary adapter and an AM Planetary gearbox. Feed that into a Toughbox and then run it's output through the 4.125 chain reduction. This will give us 33% less torque than the original design, but with enough surgical tubing will still work. The catch is paying for a second gearbox set up and rush shipping, as well as waiting for delivery.

Option #2: Go back to our roots and install the 2011 FP motor into a DeWalt transmission and then run that to the chain reduction. The result would be approx. 20% less torque than the original design, but most likely more reliable than the BB tranny. Add some surgical tubing and we are good to go. This will be virtually a zero cost option for us as we already have the parts.The only caveat is pressing the pinion onto the FP is always a risky proposition.

Are there any other transmission options out there that can be attained quickly and easily?
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Unread 16-02-2011, 13:50
Andrew Schreiber Andrew Schreiber is offline
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Re: Alternatives to Banebots transmissions.

You could use the FP gearbox and a 2:1 reduction to get ~the same (2 and some change will give you the reduction you need). My brother posted a picture of a nice easy way of interfacing with the FP gearbox a couple days ago.

EDIT: http://www.chiefdelphi.com/media/photos/36316 There is the picture and description of the part. If you would like more details I have another 3 of those sitting in my shop right now and can measure them.
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Last edited by Andrew Schreiber : 16-02-2011 at 13:53.
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Unread 16-02-2011, 13:53
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Re: Alternatives to Banebots transmissions.

There have been various alternatives posted here on the forum

Large Discussion:
http://www.chiefdelphi.com/forums/sh...nebots+plus+fp

Here is our teams solution:
http://www.chiefdelphi.com/media/photos/36278?
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Unread 16-02-2011, 13:55
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Re: Alternatives to Banebots transmissions.

we have a relatively light arm, and with some latex tubing and 4:1 reduction from a V belt system, we have no problem driving it with a window motor.

They're in the KOP. They're funky as far as mounting and shafts and whatnot, but might do the job.

Kinda depends on what you're doing with it, you didn't provide pictures so it's going to be guesswork on our part
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Unread 16-02-2011, 13:58
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Re: Alternatives to Banebots transmissions.

Quote:
Originally Posted by Andrew Schreiber View Post
You could use the FP gearbox and a 2:1 reduction to get ~the same (2 and some change will give you the reduction you need). My brother posted a picture of a nice easy way of interfacing with the FP gearbox a couple days ago.

EDIT: http://www.chiefdelphi.com/media/photos/36316 There is the picture and description of the part. If you would like more details I have another 3 of those sitting in my shop right now and can measure them.
Quote:
Originally Posted by jwfoss View Post
There have been various alternatives posted here on the forum

Large Discussion:
http://www.chiefdelphi.com/forums/sh...nebots+plus+fp

Here is our teams solution:
http://www.chiefdelphi.com/media/photos/36278?
This was the first option we thought of as well. The problem is, with the design of our tower and arm, there is no location where the FP trans can go that will work. In fact, I even pulled out the materials to make the interface you mentioned Andrew, but without a location to mount the tranny, it really becomes a mute option.
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Unread 16-02-2011, 14:07
Andrew Schreiber Andrew Schreiber is offline
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Re: Alternatives to Banebots transmissions.

I would see if a Window motor could handle it.

Your other option MIGHT be to modify the FTC Tetrix motor transmissions to go on a FP or RS775/550. This will give you a decent start of a reduction but I would NOT trust it under heavy load.
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Unread 16-02-2011, 14:08
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Re: Alternatives to Banebots transmissions.

Quote:
Originally Posted by billbo911 View Post
Option #1: Purchase a FP Planetary adapter and an AM Planetary gearbox. Feed that into a Toughbox and then run it's output through the 4.125 chain reduction. This will give us 33% less torque than the original design, but with enough surgical tubing will still work. The catch is paying for a second gearbox set up and rush shipping, as well as waiting for delivery.
If you have enough room for Option#1 I don't see how you don't have the room for a FP Gearbox and Motor. Please provide a picture of your assembly so we can understand the situation and provide a better answer.
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Unread 16-02-2011, 14:11
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billbo911 billbo911 is offline
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Re: Alternatives to Banebots transmissions.

Quote:
Originally Posted by squirrel View Post
we have a relatively light arm, and with some latex tubing and 4:1 reduction from a V belt system, we have no problem driving it with a window motor.

They're in the KOP. They're funky as far as mounting and shafts and whatnot, but might do the job.

Kinda depends on what you're doing with it, you didn't provide pictures so it's going to be guesswork on our part
Yep, this was the other alternative we were looking at last night. The reason we are steering away from it is only because we would like a little more speed out of the system. Yes, it absolutely would get the job done, but as you said, it will be rather tricky getting all the pieces to work together. It is on the short list if we bend the FP shaft.

Slow motion is way better than no motion!

I'll try to get some pictures up this evening.
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Unread 20-02-2011, 01:03
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billbo911 billbo911 is offline
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Re: Alternatives to Banebots transmissions.

Quote:
Originally Posted by Andrew Schreiber View Post
You could use the FP gearbox and a 2:1 reduction to get ~the same (2 and some change will give you the reduction you need). My brother posted a picture of a nice easy way of interfacing with the FP gearbox a couple days ago.

EDIT: http://www.chiefdelphi.com/media/photos/36316 There is the picture and description of the part. If you would like more details I have another 3 of those sitting in my shop right now and can measure them.
Andrew,
Thanks for the advice and link. As you can see below, we took the idea and modified it for our situation.

Quote:
Originally Posted by jwfoss View Post
If you have enough room for Option#1 I don't see how you don't have the room for a FP Gearbox and Motor. Please provide a picture of your assembly so we can understand the situation and provide a better answer.
Jwfoss,
You are absolutely right, we did have plenty of room.


Here are some pictures of the final solution.






The new hub was cross drilled and bolted to prevent it from coming unscrewed.

This motor has so much power that we are limiting it to only 35% of max power.

The mounting bracket is 3/16 polycarbonate with a .5" ID flange bearing in it to support the shaft, and a shaft collar to keep it all together.
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Unread 20-02-2011, 08:56
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Re: Alternatives to Banebots transmissions.

Looks great. Glad to see another FP gearbox/775 combo. Our ran great all day yesterday at the scrimmage. We have ours (dual) currently running at 60% power.
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Unread 20-02-2011, 13:01
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Re: Alternatives to Banebots transmissions.

Quote:
Originally Posted by jwfoss View Post
Looks great. Glad to see another FP gearbox/775 combo. Our ran great all day yesterday at the scrimmage. We have ours (dual) currently running at 60% power.
This is with the FP motor, not the 775. We figured we might as well use what was supplied without having to modify a thing.
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