Denford Triac VMC with ATC Conversion / Fix

**Chaz** · 21-06-2015

OK, I hadnt saved the steps setting. Sorted now, very close to spot on but still having issues when I connect Z. Without Z, the machine will work fine even though + - are reversed (according to the stickers on the mill). I tried to get Z to PID tune but its not happy and the mill starts to move the other axis without me asking. Odd. Not sure if I am getting some cross talk on the wires, ive checked all the wires a few times.

So, this might not look like much, but i can draw with some gcode.

**i2i** · 21-06-2015

the arrows are showing table movement, and as we all know it's the tool movement we look at.

**Chaz** · 22-06-2015

Originally Posted by i2i

the arrows are showing table movement, and as we all know it's the tool movement we look at.

Ah, yes, that makes sense. I am used to 3D printers and my own previous mill where the head moves, not the table.

**Chaz** · 22-06-2015

Can someone please explain this to me?

Look at the image below, this is the wiring diagram and shows that the 24 PSU (down the bottom) is fed from 110V, correct?

Then here is a photo of the same 24V PSU, take a note of the 'jumper' on the bottom right. What is this set to take as AC input voltage, 220 or 110V?

So, if there is a jumper, its 110V, if not 220V?

**Clive S** · 22-06-2015

The way I read it is if you want to run the tx on 110V then leave the link in. leave the link out if you require it to be run on 240V.
Have you measured the o/p voltage? ..Clive

**Chaz** · 22-06-2015

Originally Posted by Clive S

The way I read it is if you want to run the tx on 110V then leave the link in. leave the link out if you require it to be run on 240V.
Have you measured the o/p voltage? ..Clive

That's my understanding too. There is no jumper, therefore its set to 220V.

I wired it directly last night as I wanted the CS Labs controller to stay powered, even when the 110V drops out for whatever reason. So I connected it to 220V and a bit later, the PSU greeted me with some smoke. I should have measured the voltage prior to connecting up but there is no jumper, I checked this, which means 220V input is OK.

Clearly not .... Maybe both of us have the wrong way of thinking of this link / jumper. Just to confirm, that pic was taken before anything was changed and shows all wiring as it was. There is no jumper / bridge. I checked the unit again this morning before coming to work.

**Chaz** · 22-06-2015

There must be a jumper in there somewhere. Ill triple check tonight. If you look at the manual too, it confirms what we both believe to be correct. I see no jumper ....

**m_c** · 22-06-2015

It's hard to tell due to the clear plastic cover, but I'd say there's a little metal bar going up and over the plastic divider between the terminals.

**JAZZCNC** · 22-06-2015

Originally Posted by Chaz

I tried to get Z to PID tune but its not happy and the mill starts to move the other axis without me asking. Odd. Not sure if I am getting some cross talk on the wires, ive checked all the wires a few times.

Have you tried Reversing the Encoder signal in the Plug-in.? This would cause false movement of Z axis but not sure it would affect others but possible so worth trying.!

**Chaz** · 22-06-2015

Originally Posted by JAZZCNC

Have you tried Reversing the Encoder signal in the Plug-in.? This would cause false movement of Z axis but not sure it would affect others but possible so worth trying.!

Ill try again this week. I need a new 24V PSU first. So both X and Y are reversed, otherwise they do not respond properly. Might be that Z needs to be set to normal, perhaps an assumption that they would all be the same.