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By: psyco_klown
New: 17-02-2010 23:37
Updated: 17-02-2010 23:37
Views: 1745 times
This a custom adaptor we made this year for our kicker. It connect two window motors together. Its set up with a 12t for #35 chain. Our sponsor at thorn industries helped make these. any questions feel free to ask.
Discussion
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18-02-2010 04:46
GUI
Re: pic: Window sprocket adaptor
Out of curiosity, how was this made? I'm guessing the splines were broached?
18-02-2010 05:44
Travis Hoffman
Re: pic: Window sprocket adaptor
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Originally Posted by GUI
Out of curiosity, how was this made? I'm guessing the splines were broached?
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18-02-2010 06:58
artdutra04
Re: pic: Window sprocket adaptor
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Originally Posted by Travis Hoffman
Wire EDM / Lathe? First one to guess correctly gets one for free, right?
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// Still laughing over the timing of our photos...
18-02-2010 07:29
psyco_klown
Re: pic: Window sprocket adaptor
Travis hoffman is correct. They were lathed first, then wire edm. They took about 1hr 1/2 to make. The adapter is made out of 7075 aluminum and weight less then the plastic adapter they give in the kit. We also created an AM sprocket adapter. We are looking at producing more for teams only if there is a demand for them. Well art you can stop by our pit on Saturday at suffield shakedown and check one out. Travis pm me and Ill send one out you can test with and give me feed back.
That is funny we posted about the same time
18-02-2010 10:03
Jeff 801
Re: pic: Window sprocket adaptor
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Originally Posted by artdutra04
You could make them with a 4mm keyway broach, but I'm guessing they were made via wire EDM, since it's a lot easier than lining up six broaches accurately. If I guessed right, Travis can have the free one since literally ten minutes ago I finished machining nine 18t 25-pitch Denso motor hubs for GUS.
// Still laughing over the timing of our photos... |
How do you plan on keeping the sprocket retained on the motor?
18-02-2010 10:14
grosh
Re: pic: Window sprocket adaptor
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Originally Posted by Jeff 801
How do you plan on keeping the sprocket retained on the motor?
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18-02-2010 10:16
Mike Betts
Re: pic: Window sprocket adaptor
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Originally Posted by artdutra04
You could make them with a 4mm keyway broach, but I'm guessing they were made via wire EDM, since it's a lot easier than lining up six broaches accurately. If I guessed right, Travis can have the free one since literally ten minutes ago I finished machining nine 18t 25-pitch Denso motor hubs for GUS.
// Still laughing over the timing of our photos... |
NINE? You know that you're only allowed 2 windows on a robot...
JK... Nice Job...
Mike
18-02-2010 10:29
JHSmentor
Re: pic: Window sprocket adaptor
ummm - how do I get some? I wish we had the ability to do stuff like this.
18-02-2010 10:35
EricLeifermann
Re: pic: Window sprocket adaptor
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Originally Posted by Mike Betts
Art,
NINE? You know that you're only allowed 2 windows on a robot... JK... Nice Job... Mike |
18-02-2010 11:44
=Martin=Taylor=
Re: pic: Window sprocket adaptor
You better make sure those motors are always turning at the same speed...
...otherwise its bye-bye Mr. Denso 
18-02-2010 11:44
Mike Betts
Re: pic: Window sprocket adaptor
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Originally Posted by EricLeifermann
Pretty sure you are allowed 4 window motors on the robot, seeing as we received 4 in the kit.
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Thank you for pointing that out to me. We only received 2 last year and I missed the increase.
Regards,
mike
18-02-2010 12:42
psyco_klown
Re: pic: Window sprocket adaptor
http://www.facebook.com/home.php?#!/...8&id=530290273
the motors hold the adapter from moving. We already have taken care of the motors at moving different speeds.
19-02-2010 00:20
jspatz1
Re: pic: Window sprocket adaptor
We would be interested to know if you have any trouble with your Denso motors overheating and cutting out. We had two Densos mated exactly this way for our swerve steering, but had to switch to steering with a CIM because the Densos would overheat and stop. Perhaps on a kicker they do not run enough to be problem. They are window motors so for safety they are designed to cut out when they stall on something and heat up. Not really the ideal motor to build robots with.
19-02-2010 01:01
artdutra04
Re: pic: Window sprocket adaptor
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Originally Posted by jspatz1
We would be interested to know if you have any trouble with your Denso motors overheating and cutting out. We had two Densos mated exactly this way for our swerve steering, but had to switch to steering with a CIM because the Densos would overheat and stop. Perhaps on a kicker they do not run enough to be problem. They are window motors so for safety they are designed to cut out when they stall on something and heat up. Not really the ideal motor to build robots with.
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So using the observed torque, I back tracked and redid the gear ratio to maximize the power output and lower the current draw to a reasonable amount.* I've pinned the reason for the discrepancy down to a few SWAGs at coefficients of friction between different materials not listed in the commonly available engineering tables like Machinery's Handbook. In the future I'll probably perform tests to experimentally ascertain these values instead of guestimating values at 2am...
19-02-2010 02:22
AdamHeard
Re: pic: Window sprocket adaptor
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Originally Posted by =Martin=Taylor=
You better make sure those motors are always turning at the same speed...
...otherwise its bye-bye Mr. Denso |
I even took a pair driven together in my hands and tried to get them to rotate as differently as possible, they definitely handle a good deal of force difference while running together (at least at full speed).
19-02-2010 07:18
Collin Fultz
Re: pic: Window sprocket adaptor
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Originally Posted by jspatz1
We would be interested to know if you have any trouble with your Denso motors overheating and cutting out. We had two Densos mated exactly this way for our swerve steering, but had to switch to steering with a CIM because the Densos would overheat and stop. Perhaps on a kicker they do not run enough to be problem. They are window motors so for safety they are designed to cut out when they stall on something and heat up. Not really the ideal motor to build robots with.
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