White Paper Discuss: Nothing But Dewalts

[jimfortytwo]

Originally Posted by Ryan Foley

Just a note, the CIM assembly involves dropping the first stage of the transmission, so the gear reductions on the CIM assembly are 3:1, 4:1, 12:1. The CIM puts out .79Nm at 40A (which was the amp limit last year) so after the 12:1 gear reduction, the whole assembly puts out about 9.5Nm (assuming I did math right of course!).

Thanks Ryan. I was responding to Max's suggestion that retaining all three reduction stages (not what Joe P recommends) might lead to a gearbox failure. Personally, I think that the XRP can probably handle twice its rated torque-- but thats just a gut feeling.

Although I am aware that the CIM outputs only .79Nm at 40A, it must be remembered that our 40A breakers can actually sustain upwards of 80A for short durations. Using the 40A number, even with all three stages we remain well under rated torque for the transmission. In my calculation I used the stall current to be conservative. I am curious what the real maximum momentary load from a CIM motor is, once you factor in our breakers and our non-ideal voltage source.