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TORQUE REDUCTION IN DRIVE ?
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Posted by: balajigopinath ®

02/25/2004, 01:19:11
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Hi,

  I'm working with a product ,in which the power has to be transmitted through a set of gears. i.e in 3-stages.

It is suppossed to give 21 kgf-cm at the last gear shaft.

The driving motor is giving 0.25 kgf-cm at the input end and the gear ratio maintained is 350.

Therfore I'll be getting 21 kgf-cm at the last gear.

But I'm getting only 8 kgf-cm.

I want to know whether the torque transmitted from a gear to meshing gear will be affected by the pitch circle diameter value of both the gears(i.e smaller/bigger value changes the torque tranmitted between them)  GEAR RATIO BEING KEPT CONSTANT.

By maintaining the  smaller Center to Center  distance between gears will give more torque.

I request earliest suggestion in this regard. Also any other reason for this is
highly appreciated.

Thanks,

Balaji K.







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Re: TORQUE REDUCTION IN DRIVE ?
Re: TORQUE REDUCTION IN DRIVE ? -- balajigopinath Post Reply Top of thread Forum
Posted by: RandyKimball ®
Barney
02/25/2004, 19:14:03
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An input motor is rated at a torque at a voltage. If you aren't providing the correct voltage, you will not be producing the correct rated torque.

If you toss out friction, and other losses, you should get 350 times the torque in a 350 to 1 gear reduction. Something is wrong. You should be "near" .25 kgf-cm X 350 = 87.5 kgf-cm, this is way more than your 8 kgf-cm.
Are you really at 350 to 1? Is your voltage WHILE LOADED at the rated voltage. I suspect your power supply voltage is dropping too low while loaded.

-randy-




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