Denford Triac VMC with ATC Conversion / Fix

**JAZZCNC** · 21-06-2015

Did you use the PID tuner.? If not then chances are your EPid fault is because of following error.!

**Chaz** · 21-06-2015

Originally Posted by JAZZCNC

Did you use the PID tuner.? If not then chances are your EPid fault is because of following error.!

Nope, not done that yet.

So the problem seems to be that it tried to home and went past the limits. I cant get it back from that now cos it thinks its hitting them on the way back. Ideally I can move the servos manually by hand to reset but difficult to get to them.

I also need to check the steps. I believe its on 1024 ppr but difficult to confirm this as I need a tool to login on the drive to check. Its a 5mm leadscrew all round from what I can tell. The ratio amount and the quadrature value, how would I know these?

Also, what's the easiest way to reverse the direction of the motors?

**Chaz** · 21-06-2015

OK, X and Y are working, inverse direction but I can do basic G Code. The measurement however is 3 times too much. Have changed the steps / mm value in Mach3 but no difference. Its doing a 60mm square instead of a 20mm.

Something not right with Z when I connected it back up.

**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

**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.