Motor in-lb torque converting to actual weight?
Motor in-lb torque converting to actual weight?
(OP)
I'm trying to figure out what size stepping motor I will need to push a piston at 500 Lbs of pressure. The motors I was looking at tell me a in-lb torque rating, but I need to be able to figure a good size to start with. I will be gearing this down as well.
But if a motor is rated at say 260 in-lbs. torque, and is geared 1 to 1 what pressure would that be able to push? I think I will be able to figure the gearing once I know this. Thanks for you help....
But if a motor is rated at say 260 in-lbs. torque, and is geared 1 to 1 what pressure would that be able to push? I think I will be able to figure the gearing once I know this. Thanks for you help....





RE: Motor in-lb torque converting to actual weight?
TygerDawg
RE: Motor in-lb torque converting to actual weight?
260 in-lb is the torque required to pull 260 lb on a 1" raduis. So if you had a 2" OD pulley you could pull 260 lb. With a 4" OD pulley, 2" radius, you could pull 130 lb.
The size motor you will need will also depend on how fast you want to move. One horsepower equation is:
(speed in feet per min.) x (force in lbs.) / 33,000
(60 fpm ) x (260 lb) / 33,000 = .47 hp
Of course we live in a world with friction so the gearing or mechanism you use to convert the motion of motor to the desired motion will use up some of your power. As a rule of thumb an acme screw will use up about 50% of you power.
If you give some more details it would help.
Barry1961
RE: Motor in-lb torque converting to actual weight?