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Unread 08-10-2018, 10:56 AM
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pic: 4587 Flat 3 Mini CIM Gearbox (Cheesy Spoof)

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Unread 08-10-2018, 01:56 PM
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Re: pic: 4587 Flat 3 Mini CIM Gearbox (Cheesy Spoof)

For some reason the colors don't seem to be the same? Maybe it's my monitor rendering it poorly...
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Unread 08-10-2018, 02:14 PM
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Re: pic: 4587 Flat 3 Mini CIM Gearbox (Cheesy Spoof)

If you were looking to do an even more exact copy I believe there were some pics of the poofs layout sketches for the gearbox in their build blog.
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Unread 08-10-2018, 02:49 PM
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Re: pic: 4587 Flat 3 Mini CIM Gearbox (Cheesy Spoof)

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Originally Posted by Schmools View Post
If you were looking to do an even more exact copy I believe there were some pics of the poofs layout sketches for the gearbox in their build blog.
I used them. The only thing different really is the lightening pattern I created.
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Unread 08-10-2018, 02:52 PM
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Re: pic: 4587 Flat 3 Mini CIM Gearbox (Cheesy Spoof)

Are you planning on using this somehow, or was it just a little CAD practice?
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Unread 08-10-2018, 03:08 PM
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Re: pic: 4587 Flat 3 Mini CIM Gearbox (Cheesy Spoof)

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Originally Posted by justin.chau View Post
Are you planning on using this somehow, or was it just a little CAD practice?
We will probably end up using it next season meaning I will release the cad here soon.
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Unread 08-10-2018, 03:23 PM
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Re: pic: 4587 Flat 3 Mini CIM Gearbox (Cheesy Spoof)

You really are quite good at this hahaa, have you tried or will you try the elevator?
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Unread 08-10-2018, 03:29 PM
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Re: pic: 4587 Flat 3 Mini CIM Gearbox (Cheesy Spoof)

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Originally Posted by JohnFogarty View Post
You really are quite good at this hahaa, have you tried or will you try the elevator?
Maybe for fun. Idk.
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Unread 08-10-2018, 05:32 PM
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Re: pic: 4587 Flat 3 Mini CIM Gearbox (Cheesy Spoof)

Are you sending the torque to 2 CIMs through one pinion? This may cause issues. Here is a thread where this cropped up.

https://www.chiefdelphi.com/media/photos/45481
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Last edited by Skyehawk : 08-10-2018 at 05:35 PM.
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Unread 08-10-2018, 07:03 PM
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Re: pic: 4587 Flat 3 Mini CIM Gearbox (Cheesy Spoof)

Quote:
Originally Posted by Skyehawk View Post
Are you sending the torque to 2 CIMs through one pinion? This may cause issues. Here is a thread where this cropped up.

https://www.chiefdelphi.com/media/photos/45481
Yes, but there is a bearing supporting the mini cim shaft that should reduce the stress on the shaft, same setup as the poofs 2018 gearbox.
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Unread 08-10-2018, 08:31 PM
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Re: pic: 4587 Flat 3 Mini CIM Gearbox (Cheesy Spoof)

Quote:
Originally Posted by Cash4587 View Post
Yes, but there is a bearing supporting the mini cim shaft that should reduce the stress on the shaft, same setup as the poofs 2018 gearbox.
We have ran an unsupported pinion double engaged for the past 3 seasons, with little issue. We used steel pinions this year and never had to replace them. We replaced the 2 40t gears in the first stages after two regionals and championship.
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Unread 08-11-2018, 08:12 AM
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Re: pic: 4587 Flat 3 Mini CIM Gearbox (Cheesy Spoof)

Good work Cooper.


Do you have a render made at a different angle? I am trying to figure out the small center plate plate with a bearing that appears to be in line with the shaft of the middle motor.


Do the three screws across the top go all the way through the stand-offs into one side of the end caps of each motor?
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Unread 08-11-2018, 03:13 PM
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Re: pic: 4587 Flat 3 Mini CIM Gearbox (Cheesy Spoof)

Was the center pinion an issue of wear or the Mini-CIM shaft bending? I looked around and most people have "gotten away" with no shaft bearing. I know this is a 254 contraption, but any ideas on the concept of the supported shaft?

Edit: I see this was already addressed above... sorry.
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Unread 08-13-2018, 11:41 AM
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Re: pic: 4587 Flat 3 Mini CIM Gearbox (Cheesy Spoof)

You posting the cad for this online?
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Unread 09-24-2018, 03:40 PM
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Re: pic: 4587 Flat 3 Mini CIM Gearbox (Cheesy Spoof)

Funny you made this, I had the same idea:

https://drive.google.com/open?id=1Qa...6cSF5c5aj7SaaW

In it is also a tutorial on Fusion 360 how to CAD a Cheesy-Poof drive base (essentially stock WCD). I can upload the fusion 360 files if anyone wants them. Just let me know.

Also in that folder is a few pictures of the gearbox semi-manufactured. I ran out of money to buy gears, motors, etc (this was a personal project), but Team 341's sponsor Penn State Great Valley was kind enough to let me use their water jet to make it. It was a bit of a trial and error getting the bearing holes the right size given the method of manufacturing, but in the end it worked great. Note that it's a lot smaller than it seems. I have pretty average sized hands.

Last edited by josh341 : 09-24-2018 at 03:52 PM.
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