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-   -   AndyMark Teasing us (http://www.chiefdelphi.com/forums/showthread.php?t=70245)

sdcantrell56 03-12-2008 13:35
Re: AndyMark Teasing us
 
Quote:
Originally Posted by Travis Covington (Post 778960)
Agreed, we probably wouldn't buy the 16T 1/2" keyed* sprockets either. If they were larger (preferably 22T) and with a smaller bore, we would most definitely buy a ton of them. More important than tooth count is the bore size, however. We could live with the 16T ones but would have a hard time with their 1/2" keyed* bore.
Exactly!!! We could definitely use sprockets in the 16-22 tooth range but we would have no use for a 1/2" bore. I think it would be best to maybe offer a version with a 1/4" bore and then teams could bore them to whatever they need or in our case broach them to either 3/8", 7/16" or 1/2" hex. I am trying to stay as far away from keyways as possible and making the sprockets in a 1/2" keyed bore makes that pretty difficult.

Andy Baker 03-12-2008 14:26
Re: AndyMark Teasing us
 
Quote:
Originally Posted by Travis Covington (Post 778960)
Agreed, we probably wouldn't buy the 16T 1/2" keyed* sprockets either. If they were larger (preferably 22T) and with a smaller bore, we would most definitely buy a ton of them. More important than tooth count is the bore size, however. We could live with the 16T ones but would have a hard time with their 1/2" keyed* bore.
Quote:
Originally Posted by sdcantrell56 (Post 779032)
Exactly!!! We could definitely use sprockets in the 16-22 tooth range but we would have no use for a 1/2" bore. I think it would be best to maybe offer a version with a 1/4" bore and then teams could bore them to whatever they need or in our case broach them to either 3/8", 7/16" or 1/2" hex. I am trying to stay as far away from keyways as possible and making the sprockets in a 1/2" keyed bore makes that pretty difficult.

This is great input. We are looking to make 16 tooth sprockets with a 500 key bore (to fit within an AM Shifter), and then also the same sprocket with a 250 hole.

We are also looking at making the a hubbed sprocket with 20 or 22 teeth. We will start with a 1/4" hole, and maybe have a 500 key bore if our costs are not too high.

Both of these sprockets will only be 0.41" wide, just like our other hubbed sprockets. Since this is 7075 aluminum, the strength is there to handle the stress on the keyway for these applications.

Thank you,
Andy

sdcantrell56 03-12-2008 14:53
Re: AndyMark Teasing us
 
Quote:
Originally Posted by Andy Baker (Post 779046)
This is great input. We are looking to make 16 tooth sprockets with a 500 key bore (to fit within an AM Shifter), and then also the same sprocket with a 250 hole.

We are also looking at making the a hubbed sprocket with 20 or 22 teeth. We will start with a 1/4" hole, and maybe have a 500 key bore if our costs are not too high.

Both of these sprockets will only be 0.41" wide, just like our other hubbed sprockets. Since this is 7075 aluminum, the strength is there to handle the stress on the keyway for these applications.

Thank you,
Andy
This sounds much better. The main reason I am trying to avoid keys is just the hassle of cutting a key and worrying about losing the key when changing sprockets. Hex stock is just so much simpler in my opinion. I do like the idea of the 16 tooth as a direct replacement in the shifter. Is there any way you could make them slightly narrower since 25-series chain is narrower and thus make the gearbox narrower.

Andy Baker 03-12-2008 15:46
Re: AndyMark Teasing us
 
Quote:
Originally Posted by sdcantrell56 (Post 779049)
Is there any way you could make them slightly narrower since 25-series chain is narrower and thus make the gearbox narrower.
Yes, this makes sense, but this change would require us to create shorter spacers and shorter Small Cluster Gears. At this point, for a benefit of about 0.15, I don't want to introduce more standard parts (inventory issues, production lead time, etc.). So... no, not at this time.

Thanks again for this input.

Andy

MrForbes 03-12-2008 15:50
Re: AndyMark Teasing us
 
Just to add to the discussion, we're thinking of doing live axles of 1/2" keyed round stock this year...the #25 sprockets sound helpful. Although we're also batting around some belt ideas, which may or may not pan out.

chris31 03-12-2008 16:04
Re: AndyMark Teasing us
 
Quote:
Originally Posted by sdcantrell56 (Post 779049)
Is there any way you could make them slightly narrower since 25-series chain is narrower and thus make the gearbox narrower.
We only used one sprocket on the Gen 2 Shifters so we went ahead and took the parts out and machines them to fit without the sprocket. The small weight savings and size werent really that significant but you can always do this if you want to.

gorrilla 06-12-2008 20:35
Re: AndyMark Teasing us
 
oh and by the way Andy,

in regards to the the new GEM500 gearbox,

so the price for the base stage and one stacked stage is $120 right?

how much is it for just an extra stage(if we already have the base and one stacked stage)?

AndyB 06-12-2008 23:49
Re: AndyMark Teasing us
 
--->

Quote:
Originally Posted by Andy Baker (Post 778694)
$36 (this might change a bit) - This will include all pieces needed to add a stage: 1 carrier plate and sun gear, 5 dowels, 5 planet gears, 1 ring gear, and 1 stage housing

gorrilla 07-12-2008 08:02
Re: AndyMark Teasing us
 
Quote:
Originally Posted by AndyB (Post 780439)
--->

wow,how did i miss that?:eek:

Mr_I 07-12-2008 12:07
Re: AndyMark Teasing us
 
Observation: A number of years ago, FIRST had a "fire sale" of Bosch van door motors, the ones used for years in FRC. One of our mentors heard about it and retrieved two Stack Attack style bins full of motors, so that we'd have enough for any eventuality. It turned out that FIRST was no longer shipping the Bosch motors in the KOP, and was looking to clear their shelves. So their shelves were clear, and ours were full.

The good news is that last spring, we heard that another local team was looking for those motors for a charity-related robot project. Our shelves are now clear. :cool:

AdamHeard 09-12-2008 02:35
Re: AndyMark Teasing us
 
Quote:
Originally Posted by Andy Baker (Post 778726)
We will have some available that have no anodizing. We also do that with the AM Planetary gearboxes. At this time, we cannot provide the custom color anodizing.

Andy B.
Is it physically possible to stack 5 stages in the GEM500 gearbox?

I know this would probably ultimately lead to failure with a CIM, but looking at the numbers a lower powered 540/550 sized motor through an AM planetary through 5 stages would have only slightly more torque on the final stage than a CIM with 4 stages.

Also, heads up, the link to the CIM motor on the GEM500 page just goes back to the GEM500 page.

keen101 09-12-2008 03:52
Re: AndyMark Teasing us
 
Quote:
Originally Posted by lenny8 (Post 778298)
Well i did hear Andy talking about stocking for the season maybe he just wanted to let teams know that he has a lot of Cims available.
He meant the Christmas/Holiday season. :D You know how we all love to get CIM motors in out stockings. :D heh.

Darren Collins 18-12-2008 12:28
Re: AndyMark Teasing us
 
From the new products page on the AndyMark website:

"In late January, we will have some 1/2" hex bore flanged ball bearings... yeah, you heard us right: hex bore bearings (just like FR8ZZ, but with a 1/2" hex bore)"

This brought a smile to my face. Thank you Mr. Baker!

s_forbes 18-12-2008 17:49
Re: AndyMark Teasing us
 
Wow, I'm surprised to see so many new products coming out from AndyMark recently. I just saw the new AM shifter flat aluminum sideplates, very cool! Face-mounted two speed transmissions could be made with very minimal machining with those. The hex bore bearings sound awesome too... I wonder how well they would hold up?

I can't wait to see what they come up with next.

CraigHickman 18-12-2008 19:25
Re: AndyMark Teasing us
 
....Half inch hex bore bearings? Andy, I think you just won my loyalty... *opens up Inventor* IT'S GO TIME, BABY!


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