Topics

1

General Mach Discussion / Wrong position

« on: June 06, 2015, 02:43:36 PM »

I have had Mach 3 set up on my Tree journeyman for years. Have done all kinds of crazy things with it with very few issues. Today I was thread milling a small shaft with a thread mill. It is a two pass program with two simple helical interpolations. I ran about a half dozen parts with no problem and was adjusting the feed in Gcode of the interpolations to optimize the cut time.
It made the first interpolation fine but instead of retracting to X-0.5 on the second pass it tried going to X-0.26!$% something at rapid and just snapped the thread mill off?
Once i seen it snap the cutter I hit feed hold and then stopped the program and the Mach 3 on screen DRO was at the crazy -0.26!$%.
Why the heck would it do that? I have never had it do anything like that before.
Would it be a computer hardware issue? Has any one else had this happen?
It concerns me because thread mills are not cheap and certain parts I make and work on are very expensive.

Thanks  

G40 G49 G50 G80
G90.1
( 0.375 DIA 20 PITCH THREAD MILL )
T12M6
M3S1400.000

G00Z0.5
G00X-0.5Y0.000
G00Z-0.90
G01X-0.375F7.000
G02X-0.375Y0.000Z-0.950I0.0J0.0F14.000
G00X-0.5      (<---------------------------------------- This is where it went buggy !!!!! )
G00Z-0.900
G01 X-0.365F5.000
G02X-0.365Y0.000Z-0.950I0.0J0.0F12.000
G00X-0.5
G00Z0.5
M30
M5

2

General Mach Discussion / Cutter Compensation

« on: October 14, 2008, 02:31:40 PM »

Profiling Burning table.
I am still having trouble with cutter compensation.
Some times if I stop a program and restart it it will just make a strait line with a little circle at the end and then stop.
It will do this even if I put a G40 in the head of a program? If I run a G40 in MDI and then reload the G code program. It will run fine.
It seems that the cutter comp in Mach is buggy as hell. Is there any light at the end of the tunnel for cutter comp in Mach or is it dead in the water?     

3

Feature Requests / Mach3 Embedded

« on: September 07, 2008, 01:00:41 PM »

Would be great to be able to build a dedicated hardware platform to run mach and use the PC just to monitor it. 

4

Feature Requests / Quad encoder Inputs for full closed loop operation

« on: September 07, 2008, 12:52:42 PM »

It would be nice if it was possible to close the mach to servo drive loop.

5

Feature Requests / 3D Solid real time Verification

« on: September 07, 2008, 12:44:37 PM »

Something like what is on the new Mazak's or Okuma's.
It would be even better if it was like Vericut and displayed the stock being cut by the tool.
I know this is a bit over the top but we never get anywhere without at least looking there once in a while. 

6

G-Code, CAD, and CAM discussions / cutter comp question

« on: September 04, 2008, 08:25:53 PM »

I have finished retro fitting an old Aronson Oxy fuel table with a PC and Mach3. After fighting with noise from all the solenoids it has on it I have it cutting better than it ever has before. Now that I have it up and running I would like to be able to adjust the cut width using the cutter comp. I figured I could use a “Tool” in the Tool table for each plate thicknesses / nozzle size. I just don’t know what I am doing wrong.
As I understand it G41 would be cutter comp on and left and G42 right and G40 off?
I am aware of making a preparatory linear move to initiate the compensation.
After the G41 or G42 code do I need to specify the tool number as a D value?
I had read in a post that stated that a D followed by the tool number would use the tool offset specified in the corresponding tool table entry. Or a P and the actual tool size #.

Example: using the P and tool size

M06T02
M03
G64
G90G00X114.749Y9.3884
M98P3111
G41P0.0625G01X114.6622Y10.3806
G03X113.8497Y11.0624R0.75
G02I-0.5447J6.2262
G03X113.6225Y10.7915R0.25
G01G40
M98P3491

Example: using the D and tool number

M06T02
M03
G64
G90G00X114.749Y9.3884
M98P3111
G41D02G01X114.6622Y10.3806
G03X113.8497Y11.0624R0.75
G02I-0.5447J6.2262
G03X113.6225Y10.7915R0.25
G01G40
M98P3491

My problem is that some times it will not work.
It will start the cut normally up to the G02 and then make what looks like a very tiny circle and then jump to the next M98 call?
The two subs in the code are “Pierce” and “Off and up”.

What in the world am I doing wrong?      

7

General Mach Discussion / Mach3 pausing during move

« on: June 29, 2008, 01:04:03 PM »

When Mach3 is running it will some times pause for a second. It is more noticeable during a rapid move as it will some times trip the over current protection in my servo drives as they try to come to a dead stop at 200 IPM and then resume acceleration within a split second. I have watched the Mach3 read out while it does this and it seems to stop for a split second then start. So i am pretty sure Mach or the Pc is the culprit. Any ideas?