View Full Version : Drive for a welding rotator

07-20-2011, 08:21 PM

I am new to all this stuff, so please excuse my ignorance.

I want to make a drive for an old wood lathe. I need to rotate at about one revolution every minute or so. It is for welding tubes between centres. I am guessing a stepper motor with a power supply and controller to feed the motor a pulse signal. I just need a knob to vary the speed - nothing complicated.

What is the best way to do this?

07-21-2011, 02:28 AM
Depend on your load, small load you can use stepper. For big load, I use 1-1 1/2" KW AC motor with gear reducer or you can buy ready to use AC motor with adjustable speed (with gear). I use the latest one (cheaper and constant speed and torque can be achieved), max is 7 RPM. I use them at .5 to 1.5 RPM (use timing belt to reduce speed since speed must be constant for welding quality) for welding casing and wellhead. My load max is 1 ton.

07-22-2011, 12:08 AM
Thanks for your reply asuratman. We are welding 1.5" diameter titanium tubes that are up to 700mm long and 0.9mm thick using TIG. So our loads are very small.