New build with recycled parts on a ridiculous budget 120cm*60cm work area

**Chaz** · 19-10-2017

5V comes from USB, 12 - 24V - external PSU. Same BOB was used on my previous Emco lathe.

**Desertboy** · 19-10-2017

Originally Posted by Chaz

5V comes from USB, 12 - 24V - external PSU. Same BOB was used on my previous Emco lathe.

But there's 3 pins bottom right marked PC GND and 2 marked PC 5v I was wondering are these inputs? if so do they replace the usb? I'm going to run a 4 pin molex from the PC power supply so have bother 5v and 12v to tap would be neater than USB and possibly more reliable?

It's nice that the BOB came with not even one piece of paper lol I had to google around to find that image or what looks like my board.

**Chaz** · 19-10-2017

Originally Posted by Desertboy

But there's 3 pins bottom right marked PC GND and 2 marked PC 5v I was wondering are these inputs? if so do they replace the usb? I'm going to run a 4 pin molex from the PC power supply so have bother 5v and 12v to tap would be neater than USB and possibly more reliable?

It's nice that the BOB came with not even one piece of paper lol I had to google around to find that image or what looks like my board.

Perhaps, not sure. Mine used USB power.

**Desertboy** · 19-10-2017

Dumb question but the spindle has 4 pins marked 1, 2, 3 & 4 which is the ground? (I think it's 4)

To check if it's grounded do I just undo the bolts at the top and it comes off?

Should I just solder directly to those pins or is there a connector I crimp on?

**Chaz** · 19-10-2017

Originally Posted by Desertboy

Dumb question but the spindle has 4 pins marked 1, 2, 3 & 4 which is the ground? (I think it's 4)

To check if it's grounded do I just undo the bolts at the top and it comes off?

Should I just solder directly to those pins or is there a connector I crimp on?

Ring it out with multimeter. One of them should respond to the metal casing. If not, measure the resistance between the windings till you are certain you have the 3 phases identified.