Litf
Litf
(OP)
I have a stepper type motor driving a ball screw that lifts an arm that can weigh up to 100LB. is there a formula that i can figure what kind of power i need like This much weight + something = power. I need this in simple terms. LOL thanks





RE: Litf
If you know how fast the 100# weight is being lifted, you can convert to horsepower.
If you lift it 5.5 feet in one second you are doing 100x5.5=550 ft-lb/sec of work, which is 1 horsepower.
1 HP =745 watts.
then you have the efficiency factor of the ball screw, motor, and the gear train. If you have no quatitative measurement of that, I would use a rectally extracted number of about 60% for an initial estimate. So for every 100 watts of electricity you put in you would expect to get approximately 60 watts (.08 HP) of mechanical work out.
RE: Litf
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RE: Litf
you want to raise 100 lbs 1500 mm (1.5m = 5ft)
which will need 5/5.5 = 0.9hp to complete in 1 sec,
to account for estimated losses use a 2hp motor.
less hp means it'll take longer (than 1 sec).
RE: Litf