DualValve
Aluminum
- Joined
- Feb 1, 2019
I purchased a Hardinge HC 'Chucker' last week, it did not have any manuals, or wiring schematics.
I searched this site, as well as a Google search for 'Hardinge HC wiring' I found several threads here on PM discussing the HC control box and the many relays and transformers.
My HC has the Hardinge metal information badge on the control-box door. It states that the lathe is 220V, 3phase. And that the control voltage is 120v.
But when I hooked it up to my RPC-sourced 220v 3ph power, i could not get any relays to close.
I checked the voltage at the output of the main transformer and found that the control voltage was 59-60v.
I then searched again, found a photo of the control panel with door open, and i compared the wiring of the transformer.
I also got some help from fellow PM member Frank, who pointed out that the main transformer was wired for 440V power. So, with my transformer wired for 440V, and with a 220v input it did not produce 120v, but 60v for the control circuitry
I moved the jumpers on the transformer to make it use 220v and ended up with the correct 120v control voltage.
The power button now does close the main relay, but I cannot find out why the motor really will not work.
So; i did find the needed photos, and several partial hand drawn schematics. But the images of the original wiring diagram on this site and found via Google, But the wiring diagram is way, way too small a file, and the image too dark and low-contrast. I've tried everything i can think of to improve and read the image of the original wiring diagram.. Photoshop helped but even with many manipulations of the image, I just cannot read and follow the lines.
I'm confident that with a good bright readable .pdf of the wiring diagram, i'll be able to follow the circuitry and figure out why the motor drive relay won't close. i can manually close it, and the motor runs/
So, does anyone have a link to a GOOD image of the HC wiring schematic or diagram?
I'll be glad to buy a good bright reproduction of an original diagram. I'd prefer to have a paper copy anyway.
My Hardinge HC is the later version, Here is an image of my control panel.
Thanks in advance for your help.
DualValve
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