Messages

1

General Mach Discussion / Re: Unusual Slave axis problem

« on: September 10, 2015, 12:43:07 AM »

oh and I should mention there is basically no chance it is a mechanical issue with the table. The whole table is built by a real German Machinist and he is an absolute perfectionist. It's been in the works for about a year now he did a REALLY nice job

2

General Mach Discussion / Re: Unusual Slave axis problem

« on: September 10, 2015, 12:38:10 AM »

I don't believe so.. I have actually now had the issue happen while jogging the machine. I thought I found the reason for the issue, previously I was driving the X and A axis from the same output on the PBX. (DIR+ and PUL+ was a shared signal running to both X and A axis stepper motor controllers) However, I have now changed this to it's own independent channel for X and A, figuring the signal from the PBX was to weak to supply both controllers. Unfortunately the same issue showed up shortly after I made the change. All of the cable on the stepper motors are shielded and grounded. The wires are secured to the opposite sides of the cable trays from the torch to maximize distance to reduce the risk of interference. The issue seems to occur frequently as the machine is trans-versing to the cut start point before the torch is ignited. 



on an unrelated note I have noticed when the machine is leading in on a cut it accelerates very suddenly regardless of what I set the acceleration rate this is affecting the quality of circular cuts is there any way to slow this down?



thanks for the help!

3

General Mach Discussion / Unusual Slave axis problem

« on: September 09, 2015, 05:31:40 PM »

I'm having a rather odd problem with mach 3. I have a plasma table running cuts well most of the time however occasionally when I start a cut the slave axis and x axis do not move in unison. its a fairly aggressive switching one motor to the other. this only happens right when I start a cut. I could jog the table back and forth all day and it would never do it. the real interesting part is that I can jog the machine normally immediately after this has happened without resetting anything. It seems to me this problem must be tied into the software somehow. does anyone have any thoughts?

I am using a probotix PBX with probotix steppers and Keling Technologies KL-4030 stepper motor drivers 

thanks!

4

Mach3 and G-Rex / Re: Pause for Arc to stabilize?

« on: July 02, 2015, 11:29:39 AM »

perfect that worked, the name THC ON was misleading haha thanks!

5

Mach3 and G-Rex / Re: Pause for Arc to stabilize?

« on: July 02, 2015, 10:38:25 AM »

Thanks I will give that a try in a minute 

6

Mach3 and G-Rex / Pause for Arc to stabilize?

« on: June 30, 2015, 06:41:44 PM »

Hello, I have built a plasma CNC controller to be used with a Hypertherm THC. the arc and Z axis is completely controlled by the Hypertherm unit.

What I need is an input that will not allow the cut to proceed until the hypertherm THC gives the go ahead. I have the torch on signal working but for some reason no matter what I do the cut resumes before the arc is ready.

Can anyone help me with this issue? I have tried using OEM Trig #1 but the system seems to ignore it even tho I can see if is working on the Diagnostics tab

thanks!