Quote:
Originally Posted by eddie12390
It wasn't really my decision. The impression that I have gotten from why that decision was made is that we had already made a shooter with CIMs going into the CIMple box and the person building it didn't want to take the CIMple box off of the bot. I had actually suggested removing the CIMple box from the equation but it was basically said that we didn't have time for "that type of change".
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"There's never enough time to do it right, but always enough time to do it over." Guess what, you have a week to do it over, because 5 weeks wasn't long enough to do it right.
The CIM-U-LATOR runs a 2.7:1 reduction; the 775 turns at 19500 rpm with no load. This gives 7222 rpm going into the CIMple box (about 2K more RPM than a CIM). The CIMple box has a 4.67:1 ratio; this means that the output is spinning at about 1500 rpm. Torque-wise, however, you went from 166.4 oz-in stall torque (motor only) up to almost 2100 oz-in (motor through two gearboxes). That's a bit more than you should ever need for a lightly-loaded shooter! (Your total reduction is about 12.61:1; that's a wee bit on the high side for something that needs to spin fast.)
Pull the CIMple box out, and your speed goes up by about a factor of 5, your stall torque goes down by the same factor, give-or-take a bit for loading and speed. That should give a much longer range, while still allowing you to load and fire easily without jamming up.
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Past teams:
2003-2007: FRC0330 BeachBots
2008: FRC1135 Shmoebotics
2012: FRC4046 Schroedinger's Dragons
"Rockets are tricky..."--Elon Musk
