Easyscriber engrave attachment for Hypertherm torch's

How to control a servo motor?

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How to control a servo motor?

Post by Scratch » Sat Sep 23, 2017 5:26 pm

Because of a problem I'm having in another thread, I want to build my own THC basically. Or more simply put, I want to control a servo motor separately.

I want to disconnect the Z axis servo motor from my CNC table setup, and somehow control it completely separately.

That's basically what I'm doing now since I don't have ATHC. I just sit on a chair with a welding helmet on and watch the spark cutting, bringing the head up and down by eye. I'm completely used to it by now and I don't use it enough to upgrade to a new system.

So how can I manually control this servo motor to go up and down? It has the power cable coming out of it, which is easy to get to, and it has a RJ45 connector going into it at the encoder. Here's a pic:

What do I need to do to make that happen?
I think I'm the oldest 10 year old boy on the forum...

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Re: How to control a servo motor?

Post by acourtjester » Sun Sep 24, 2017 9:39 am

Google the manufacturing Company and model of the servo for wiring diagram or other info.
DIY 4X4 Plasma/Router Table
CandCNC DTHC-IV & Feather Touch
Hypertherm PM65 Machine Torch
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Miller Mig welder
13" metal lathe
Small Mill
Everlast PM 256 tig

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Re: How to control a servo motor?

Post by rbmgf7 » Sat Oct 14, 2017 9:50 pm

Not sure we're understanding you. You say you bring the head up and down while watching the cut. Are you doing this with a controller or physically doing it with your hands? If you're doing it with a controller, aren't you already manually moving it up and down?

Regardless, all motors (stepper, servo, etc) are driven by a driver and controlled by a controller. Depending on the configuration, the driver turns the motor a specific amount of degrees based on the step signal/pulse from the controller.

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