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Unread 19-01-2016, 22:45
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Re: Heat/Friction of 775 + Versaplanetary

Something is certainly wrong.

The 775pro we wired up a few days ago would pull less than 1 amp at 12 volts (<12W) unloaded. With a lightly greased 3:1 versaplanetary and a small shooter wheel, current draw was around 14 amps at 12 volts (~168W).

Wheel speed was 5340 RPM and motor speed 16020 RPM. After a few minutes of launching boulders, motor case got to maybe 38 C (~100 F) and outside of gearbox got to around 41 C (~106 F). Warm, but to be expected with the high speeds involved.

Tomorrow I could get better data on RPM and power consumption of motor + gearbox without the wheel, which wastes quite a lot of power moving air.