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Hi there
I need to calculate motor speed and reduction on a drive wheel.
the wheel is 2" diameter and is pulling a wire that is pinched between it and another roller. I'll need 100lbs of pull on the wire. I'll need to pick a dc motor and reducer to get this and we already got it wrong once...
Motor torque minimum = 100lbs x 2" = 200 lbs-in.
With a 3:1 factor of safety you will need 600 lbs-in motor.
Thanks. Will speed be a factor? Ill want to run that at 200 rpm.
[QUOTE=shiloh;13892]Thanks. Will speed be a factor? Ill want to run that at 200 rpm.[/QUOTE]
Yes, you need motor that is torque rated at that rpm or gear it to perform optimally.
[QUOTE=Kelly Bramble;13891]Motor torque minimum = 100lbs x 2" = 200 lbs-in.
With a 3:1 factor of safety you will need 600 lbs-in motor.[/QUOTE]
Kelly,
The wheel is 2" [B]diameter[/B]. Wouldn't the moment arm be 1"? So the calculation is 100 lbs x 1" = 100 lbs-in?
[QUOTE=jboggs;14225]Kelly,
The wheel is 2" [B]diameter[/B]. Wouldn't the moment arm be 1"? So the calculation is 100 lbs x 1" = 100 lbs-in?[/QUOTE]
Yes, you're right.. hope the op caught my mistake