I must have missed something in my set up of mach 3, The tool for checking signal noise is saying my signal is OK, I went thru the windows settings and turned all the power saving settings to never. the code runs fine for about 1 hour, and then it plunges, it's done it every time at the 0-0 point on the whichever offset is current. Any help would be greatly appreciated
Thank you,
Chris May

Could it be your safe Z setting?

If you attach your xml and some code that it happens with I will see if I can simulate it here and hopefully find the problem.
Hood

Thank you, I'll transfer that from the machine in the workshop tomorrow A.M.
Chris

This is the 3rd. attempt

Chris i have looked at one of your files, and i don't like to see the way it is laid out with no spaces between commands

N100G00G20G17G90G40G49G80 one line of code as you/PP supplied it

N100 G00 G20 G17 G90 G40 G49 G80 how it should look

Phil

It could well be your safe Z setting as I mentioned earlier, looking at your xml you have it set to 2 in machine coords. Your Z travel according to your homing and limits page is 3.63 so in other words your safe Z position is is only 1.63 away from your max Z travel. If you are at a point above that and a safe Z is called then your axis will plunge down to 2 in machine coords.

One other thing to note is you really have the Z axis set wrong in Homing and limits unless of course it is not a convetional machine. Normally the Z Max would be set as zero and the Z Min set as the axis travle but a negative number.

So what I think you should really have is
Z Max Zero
Z Min -3.63
Safe Z could then be something like -0.1


If your machine is not a conventional setup then let me know how it works.

With regards to what Phil has said about the code, it is definitely easier on the eye having the spaces but I dont think Mach cares either way, I could be wrong though
Hood