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Author Topic: Autozero and Coordinate issues are loading G-Code  (Read 6468 times)

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Autozero and Coordinate issues are loading G-Code
« on: November 05, 2014, 09:46:21 AM »
I have a Chinese X6-1500gt USB and using Mach3 and I am having issues with the autozero function.

When I start my machine I use the zero the machine with a touch plate. I have it set up that it wll go to my zero plate, touch, then retract. It zeros well and it is accurate. I can hit go to home and it will go right about the work piece as desired. I can move it all around the work piece manually with jog and can zero it whereever I want up to this point.  I can zero all axis with no issues yet.

The issue arrises when I load a code to mill. When I do this all the axis of my machine go to different coordinates. These coordinates change from piece to piece that I load into mach3. All axis will no longer be zeroes to the corret location. Then after I load the piece and try to use the zero tool again to get it back to where I want it. 

It will do one of two things.
1. It will either plunge down in a feed rate much faster than it is supposed to use. It will disregard the touch plate signal when the tool touches it and keep going. Only stopping when I hit the E-Stop or turn off power to the stepper motors.
 
Or
2.  the other thing it will do is just not move down at all in the Z axis if I hit zero tool again. It wont let me jog the z axis either. But if I touch the probe to the z plate it will zero the piece and start retracting the z axis like it is supposed to.

I almost have to uninstall mach3 and install it again for it to start working correctly again. Turning off the program and restarting it does nothing to resolve the issues I am facing. Am I doing something wrong here? I am using vectric vcarce and aspire to make my parts that I am going to cut out. Mach3 is my program that I upload my gcode in to cut the parts. I am just confused on to why the machine will work great without issues when I first load up mach3. But after I load my gcode the script or the zero tool will not work correctly. Any ideas?

All I can really thing of is that in Aspire and Vectric that my default units are in inches and in mach3 my default unit is inches. However, I have cut out other pieces before I haven't had issues. However, these were piecs where I did not try to use the zero function as the pieces didn't require any tool changes. However my pieces are getting more complex and I am wanting to use large clearance tools and need to zero it correctly to produce a part that looks good.

Any help would be appreciated.

Offline Vogavt

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Re: Autozero and Coordinate issues are loading G-Code
« Reply #1 on: November 05, 2014, 11:12:21 AM »
Are you in G54 mode when you start or does Vectric Post Processor change it to G55, G56, etc.?

IF not, I'd say you're looking at a reinstallation of Mach3. Might be the quickest way to get out of trouble.

You could spend a lot of time troubleshooting at a later time but only if it happens again.

Are you using the latest version?
« Last Edit: November 05, 2014, 11:16:14 AM by Vogavt »
Re: Autozero and Coordinate issues are loading G-Code
« Reply #2 on: November 05, 2014, 12:07:23 PM »
This is one of the g codes I had been using.

Code: [Select]
( Magnet Holes )
( File created: Sunday, November 02, 2014 - 03:18 PM)
( for Mach2/3 from Vectric )
( Material Size)
( X= 4.000, Y= 6.000, Z= 0.756)
()
(Toolpaths used in this file:)
(Pocket 2)
(Tools used in this file: )
(1 = Ball Nose {0.125 inch})
N100G00G20G17G90G40G49G80
N110G70G91.1
N120T1M06
N130 (Ball Nose {0.125 inch})
N140G00G43Z0.8000H1
N150S12000M03
N160(Toolpath:- Pocket 2)
N170()
N180G94
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Does this tell you what you asked.
« Last Edit: November 05, 2014, 01:08:00 PM by Ya-Nvr-No »
Re: Autozero and Coordinate issues are loading G-Code
« Reply #3 on: November 06, 2014, 02:47:16 PM »
Anyone have any ideas?

Offline Vogavt

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Re: Autozero and Coordinate issues are loading G-Code
« Reply #4 on: November 06, 2014, 07:03:27 PM »
Okay, a few more questions.

What material are you cutting?

If this is metal and as you stated you're in inches, then plunging into the material at a feed rate of 20 seems a bit fast to me. Guess it depends on your horsepower.

Have you been successful in the past?

If so, what has changed with your machine?

Other than missing the G54 parameter in the posted code, I think you're possibly looking at a reinstall.

But, it seems your macros for the probing have gotten hosed up. Can you reinstall the macros? You might try that before doing a fresh installation of Mach3.

From looking at the code produced by Vectric it looks straight forward.

Offline ger21

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Re: Autozero and Coordinate issues are loading G-Code
« Reply #5 on: November 06, 2014, 07:22:16 PM »
Post the auto zero macro that you're using.
Gerry

2010 Screenset
http://www.thecncwoodworker.com/2010.html

JointCAM Dovetail and Box Joint software
http://www.g-forcecnc.com/jointcam.html
Re: Autozero and Coordinate issues are loading G-Code
« Reply #6 on: November 06, 2014, 10:04:37 PM »
This is the zero macro that I am using. But remember. The zero script works fine when the gcode is not loaded. I can use this script zero everything correctly. Move it to another point over and over and it will work. But as soon as I load gcode the coordinates all change. Then when I click the auto zero tool button it will mess up and not work. It will do the two things I described in my first post,

[ZeroCode]
Rem Probe Down by PEU (Based On Erniebro Work)
FeedCurrent = GetOemDRO(818)  'Get the current settings
ZCurrent = GetOemDro(802)
Code "G4 P1"   'Pause 1 second to give time to position probe plate
Code "F100"   'slow feed rate to 100 MM/MIN
GageH = GetUserDRO(1152)
ZNew = ZCurrent - 20  'probe down 20 mm
Code "G31 Z" &ZNew
While IsMoving()
Wend
Call SetDro (2,GageH)
FinalMove = GageH * 1
Code  "G0 Z" &FinalMove
Code  "G0 Z" &25
Code "F" &FeedCurrent    'restore starting feed rate   
[/ZeroCode]
To awnser all the questions

What material are you cutting?  - I am cutting wood for not. General small signs and knick knacks. State outlines.

Have you been successful in the past?  - I have been successful. But before what I was making didn't require tool changes that needed to be exact. For example. I would V-Carve some lettering, then use an end mill to cut out an outline. Now I am to the point where I need one end mill to clear out sections then a small ball nose or end mill to do some details and if I don't zero it exactly you will be able to tell in the final cut.

If so, what has changed with your machine?   - Back to what I said earlier. More advanced pieces.



Thanks for the feedback. Any more ideas?

Offline ger21

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Re: Autozero and Coordinate issues are loading G-Code
« Reply #7 on: November 06, 2014, 10:14:36 PM »
What are your Native Units set to?

Your auto zero script is set up to work in metric, but your G-code puts Mach3 in Inch mode.
Gerry

2010 Screenset
http://www.thecncwoodworker.com/2010.html

JointCAM Dovetail and Box Joint software
http://www.g-forcecnc.com/jointcam.html
Re: Autozero and Coordinate issues are loading G-Code
« Reply #8 on: November 07, 2014, 06:42:53 AM »
My vectric files are in inches. I will try in metric. But I have cut in the past and it works great. Would it really cause they much of an issie

Offline ger21

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Re: Autozero and Coordinate issues are loading G-Code
« Reply #9 on: November 07, 2014, 07:45:24 AM »
Yes, as you've seen.

When you start Mach3, it's in Metric mode.
As soon as you load g-code, Mach3 is in inch mode. All the values in your auto zero macro are in metric, so it no longer works correctly.


If you're going to be working in inches, then you should have Mach3 configured in inches.
Gerry

2010 Screenset
http://www.thecncwoodworker.com/2010.html

JointCAM Dovetail and Box Joint software
http://www.g-forcecnc.com/jointcam.html