pic: Cim with Encoder CUI Inc. AMT 102-V3524

[Twins Inc.]

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[Richard Wallace]

Nicely integrated!

Can you link a data sheet that includes the specific encoder shown in the picture? I did not see it in this AMT10 data sheet.

[Justin Montois]

Very elegant solution. Nice work.

[mman1506]

Nice! Have you tested compatibility with typical FRC gearboxes?

[jwfoss]

Using the CIM mounting configuration is a smart move as this can be applied to a large number of components from VEXpro and AndyMark. Is the plan to market this in the future or would you be willing to provide drawings/cad models?

[Chirag]

Any updates on testing this configuration? I'm really liking how slick this is but I'm very curious as to if the assembly can still be mounted to COTS gearboxes. We might want to pick up some of the FIRST Choice ones and try something similar

[Twins Inc.]

Originally Posted by Chirag

Any updates on testing this configuration? I'm really liking how slick this is but I'm very curious as to if the assembly can still be mounted to COTS gearboxes. We might want to pick up some of the FIRST Choice ones and try something similar

Be careful about doing this, because I believe the encoders on FIRST choice are a little different than the ones that we used here. While the pins here are parallel to the face that you are mounting to the CIM, the FIRST Choice ones are Perpendicular. So it wouldn't work for this application. However the CUI Encoders on FC are still very useful for the end of a shaft, like an idler, so we'll still be getting some.

The only testing we have done with these have been on a simple flywheel. We attached it to our Frisbee flywheel from 2013 with great results.

[asid61]

I'm sorry for necro-ing this, but:
Are there CAD files anywhere? I forgot to bookmark them if they're here.

[Robo Hamsters]

Very Nice.

Any chance you would be willing to share the info on this? We are planning on using the new VexPro Single Reduction Clamping Gearbox (P/N: 217-4156) and we were looking for a way to use an encoder with it.

Thanks

[amesmich]

Nice but would this be considered "Modifying a Motor"?

[asid61]

Originally Posted by amesmich

Nice but would this be considered "Modifying a Motor"?

No. It does not modify anything about the motor, you're just ataching something to it like you would any gearbox.

[Ether]

How much further out along the shaft will the CIM pinion be cantilevered?

[Richard Wallace]

Originally Posted by Ether

How much further out along the shaft will the CIM pinion be cantilevered?

The encoder is 9 mm thick. A CIM pinion (VP) is 19 mm long. The CIM shaft extension is ~31 mm past the pilot boss. So the encoder will fit between pilot and pinion, without pushing the pinion past the end of the shaft. However, it will be about 1/4 to 3/8 inch further from the front motor bearing than teams would typically put it, increasing the bending moment. In applications where bending a CIM shaft is foreseeable (I think a 254 mentor has posted about seeing that), this method of encoder mounting will increase the risk of bending the shaft.

[asid61]

Originally Posted by Richard Wallace

The encoder is 9 mm thick. A CIM pinion (VP) is 19 mm long. The CIM shaft extension is ~31 mm past the pilot boss. So the encoder will fit between pilot and pinion, without pushing the pinion past the end of the shaft. However, it will be about 1/4 to 3/8 inch further from the front motor bearing than teams would typically put it, increasing the bending moment. In applications where bending a CIM shaft is foreseeable (I think a 254 mentor has posted about seeing that), this method of encoder mounting will increase the risk of bending the shaft.

Would it be possible to press a bearing where the cim boss would normally go to negate the canteliever? Like put an 8mm bearing into the place where the cim 0.750" boss would normally go.

[Richard Wallace]

Originally Posted by asid61

Would it be possible to press a bearing where the cim boss would normally go to negate the canteliever? Like put an 8mm bearing into the place where the cim 0.750" boss would normally go.

The pilot boss might be considered part of the CIM's "integral mechanical and electrical system" per 2014 R30. I think the boss provides some of the mechanical support for the CIM's front bearing.