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Messages - baldysm

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General Mach Discussion / A axis 'stuck' in angular mode
« on: April 21, 2008, 03:03:49 PM »
I am having struggles with my Mach3 controller running a Sherline mill with a rotary table.

My .xml file got corrupted and I went back to a back up file. Everything seems to be working ok except for the A axis.

I'm stuck in angular mode with the A axis. I almost always use linear mode on the A axis, and scale things at the design stage so that a Y in the design is equal to 1 revolution in A on the machine. I just change the Y's in the output file to A's and I'm good to go.

I have the A axis unchecked in "axis is angular"  in general config, so it should be linear. I can't find anything else that seems to apply.

Current XML is attached.

Any suggestions welcome.


General Mach Discussion / Re: Z and A axis problems
« on: April 09, 2008, 05:11:50 PM »
I did some more playing. The problem is in the XML someplace. I am uploading a backup of the XML, and that seems to be working fine.

There are 16 differences between the 2 files. Some of them obviously are unrelated to the problem, and some mean nothing to me.

Now, when I make a A movement, it moves in angular movements. In general config, I have A is angular unchecked.

For the part that I gotta get out tomorrow, angular is fine (even better actually). How do I get A back to linear movement?

I'm getting closer. :)

General Mach Discussion / Re: Z and A axis problems
« on: April 09, 2008, 11:43:19 AM »
XML is attached.

I don't think it has to do with constant velocity. I thought so too initially. I am using a new CAM program (Rhino) that automatically puts in a G61. I switched back and forth between 61 and 64, took it entirely out of the program with no change. The last time I run I used the attached XML, and exact stop is selected, and there is no G61/64 in the program. I was having problems with this before, so the CAM program is not the source.

I am having another issue that may be related. I can manually jog around, go into MDI mode, and enter g0 x0y0, and I should get back to my X0Y0. Sometimes I do, and sometimes I don't. It sometimes stops at (AFAIK an arbitrary) position on the way back to 0. The display doesn't say 0 (it displays an accurate position other than 0) and entering G0X0Y0 in MDI doesn't do anything. I flip back and forth between program run and MDI modes, maybe jog a bit, and go back into MDI and then it will go to X0Y0. Hasn't been a huge problem, just a bit frustrating. I don't know if this problem started concurrently with the gouging problem or not.


General Mach Discussion / Z and A axis problems
« on: April 08, 2008, 01:51:05 PM »
I am having a problem with Mach3, version 2.0.060. Attached is the gcode of the file I am running. Runs with no errors or anything.

The code creates a simple diamond with a line in it, around a shaft.

What happens is that is as A is turning into position, Z is descending. It should get into X,A position over a diamond point, and then plunge down to Z-.005. What is happening is that A is not in the right position yet before Z starts to plunge down. It is so bad sometimes that Z is at -.005 and X has started to move before A gets to where it needs to be, so there is a big gouge approaching the diamond.

I attached a photo of the problem. The diamonds on the left are correct, and the diamonds on the right show the problem.

The problem seems to get worse as the program goes on. The last few diamonds in the program are the worst, although the code is the same. Nowhere in the gcode is there any line with A and Z on the same line, but there are times that both are moving concurrently.

Any suggestions/ideas? I have used this machine/controller with no problems before, just recently it started having these problems.  I didn't make any config changes (that I recall anyway).


General Mach Discussion / Z not working well
« on: April 01, 2008, 10:17:18 AM »
I'm having a problem with a Z axis not working right. 100% a software/program issue. I'm using version R2.0.060

Below is 1 example of a program that I'm having a problem with. I have not tried every program, but I think it's occuring with all my programs.

The problem is that the last move in the program is Z1.5, but movement stops at Z.8573, consistently. Thats where the software stops and the display says .8573.

Any ideas?

G00 G49 G40.1 G17 G80 G50 G90
M6 T1
M03 S0
G01Z0.000 F0
X0.055Y0.037Z-0.001 F2

(movement code deleted)

M5 M9

General Mach Discussion / Re: 4 axis problems
« on: August 01, 2007, 06:59:08 PM »
Thanks for the response William.

Figured it out. Brain fart on my part. For some reason, the steps per rev was 1/100 of what it should have been. So it was actually moving, just didn't look like it.

Think it's all fixed.

General Mach Discussion / 4 axis problems
« on: August 01, 2007, 05:37:07 PM »
I'm having a problem with a 4th axis on my mill.

In the past, I would set everything up, and switch the cabling around on my Y and A axis and everything would work great. That worked since steps and ratios worked out were the same.

I upgraded to a precision lead screw on the Y axis, which has a different pitch on the threads.

The problem is that I can't move the A axis in a program. I can go into jog mode, and use the insert/delete keys and the A axis spins just like it is supposed to. So I know it's not a wiring problem or something, it's a configuration problem someplace. In jog mode, the displayed position of the A axis changes as well.

I went into my G-code program, did a find/replace and changed all the Y's to A's. Program runs, just the rotary table never moves.

Any ideas what could be wrong?

General Mach Discussion / Re: multi lead threading
« on: April 13, 2007, 06:12:15 PM »
I'm not real experienced with chasers, but I don't see how their use would give me multiple leads.

Thanks Graham, I'll use that.

General Mach Discussion / multi lead threading
« on: April 13, 2007, 12:13:29 PM »
I tried going through the wizard in Mach 3 lathe, and could not find an option for multiple leads.

What is the best/easiest way to program 2,3, or 4 lead threads?

Can I use the wizard and give it a different starting Z? If I'm doing a 2 lead thread that gauges at 36 TPI, but is cut with 18 TPI, would I start 1 lead at Z0, and the next at Z .0277 for example, and just cut/paste the parts of the program I need together?

There is also a G-code that will make 1 threading cut, but seems really tedious, especially with 3-4 lead threads. I forget the exact G-code, but is that my only option for multi-lead threads?

Any ideas?

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