Messages

2451

General Mach Discussion / Re: THC setting up assistance...

« on: April 13, 2014, 03:06:29 PM »

I was using this to test the g28.1 method of probing...

G28.1 Z3.00 F250 (probe surface)
G92 Z0 (reset DRO)
G00 Z4.00 (move up by limit switch offset)
G92 Z0 (set zero)
G00 Z5.00 (move to some arbitrary point to measure the torch gap with a 5mm spacer)

Seems nice and simple, if i type it in by hand in the manual screen on Mach, it all works perfectly. leaves the Z DRO at 5.0000mm

But if i run it from a .tap file containing just that code (plus M30 at the end) it works but leaves the Z DRO reading a meaningless 11.4799mm every time???

Can this be fixed???

I have tried putting a delay after the DRO reset lines but no change.

2452

General Mach Discussion / Re: THC setting up assistance...

« on: April 13, 2014, 02:02:24 PM »

It has been mentioned to add

While ismoving()
Wend

After each call to set DRO to zero, but how can that be added if the calls come for the sheetcam post, adding a g4 delay does not work, same result.

2453

General Mach Discussion / Re: THC setting up assistance...

« on: April 13, 2014, 09:35:43 AM »

What about the DRO not setting correctly after G28.1?

Anyone

2454

General Mach Discussion / Re: THC setting up assistance...

« on: April 13, 2014, 03:21:49 AM »

What about the DRO not setting correctly after G28.1?

2455

General Mach Discussion / Re: THC setting up assistance...

« on: April 12, 2014, 04:50:14 PM »

Well, there seem to be several manuals

So.....

Hang on a minute, you may have something...

Does mach only allow the signals through when the button is on AND code is running I.e.making a cut??

I had put the THC into test mode which sends out a continuous arc ok signal plus alternating up / down signals.

I presumed this would then activate the z axis when the THC on button is pressed regardless of a cut being made.

If so then this sort of stuff really should be in the manual.

2456

General Mach Discussion / Re: THC setting up assistance...

« on: April 12, 2014, 12:32:09 PM »

Hang on a minute, you may have something...

Does mach only allow the signals through when the button is on AND code is running I.e.making a cut??

I had put the THC into test mode which sends out a continuous arc ok signal plus alternating up / down signals.

I presumed this would then activate the z axis when the THC on button is pressed regardless of a cut being made.

If so then this sort of stuff really should be in the manual.

2457

General Mach Discussion / Re: THC setting up assistance...

« on: April 12, 2014, 12:18:43 PM »

Let's fix this one first, it's the most important...



No there are no buttons, that I know of, the screen is the standard plasma set plus one button that Hood or Stirling added for me some time ago that allows my cheapo pendant to set the work origin point.

The diagnostics screen shows all ok - all three inputs show up as required but there is no connection to z axis regardless of the setting of the THC on/off toggle.

2458

General Mach Discussion / Re: THC setting up assistance...

« on: April 12, 2014, 03:14:16 AM »

No, you are misunderstanding me.

The action on the stepper motor is fine.

What is going on is that If I untick the allow-THC box as it should be when using arc signals etc, the system will not respond even though the diagnostics screen is showing my signals coming in nicely.

With the box ticked, It works but can not be stopped so if I want to run small holes, I have to disconnect the THC physically!

2459

General Mach Discussion / Re: THC setting up assistance...

« on: April 11, 2014, 01:53:25 PM »

Any ideas?

2460

General Mach Discussion / Re: THC setting up assistance...

« on: April 11, 2014, 09:52:27 AM »

Ok, with the massive help of this forum, progress is being made, I have now switched to G28.1 Z setting and rewired my THC for Arc-Ok using the now free probe input pin on my BOB.

However, this is the code I am testing...

G28.1 Z3.00 F250 (probe surface)
G92 Z0 (reset DRO)
G00 Z4.00 (move up by limit switch offset)
G92 Z0 (set zero)
G00 Z5.00 (move to some arbitrary point to measure the torch gap with a 5mm spacer)

Seems nice and simple, if i type it in by hand in the manual screen on Mach, it all works perfectly. leaves the Z DRO at 5.0000mm

But if i run it from a .tap file containing just that code (plus M30 at the end) it works but leaves the Z DRO reading a meaningless 11.4799mm every time???

Can this be fixed???

I have tried putting a delay after the DRO reset lines but no change.


I also have one missing link somewhere - If i untick "allow THC even when not in thc mode" which i guess should be unticked now, I get no action on Z axis even though the diagnostics is showing my THC commands coming in nicely??

Pressing the screen THC button does nothing.