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Topics - mhdale

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21
Hello all, I have had this problem cropping up with my system on and off now for a while. I know there are some settings in my MasterCam which are guilty of some of the problems and I have fixed them or so I think until suddenly there it is again. I wanted to see if anyone else out there had come across this issue. Attached is the GCODE of a peice I was working on, it got to line 3800 and then took off in a big loop right through the workpeice. ??? These "arcs" or circles seem to occur randomly in some of my code and it seems to be related to my POST but it is hard to FIND them as they dont allways show up on the toolpath screen.  I seem unable to comprehend exactly what or why Mach three is following the arc the long way round or why the POST format is interpreted that way as I cant tell the difference between what works and what doesnt....G Code is still a foreign language to me. Anyone ever encounter this ? is there a permanent solution for my POST/MASTERCAM...?

Thanks in advance
Mike

22
General Mach Discussion / Problems with Arcs in the X/Z Plane
« on: November 11, 2006, 05:23:28 PM »
Whenever I have posted a toolpath recently which has arcs in the X/Z plane I run into problems with the MACH3 and how it interperates the toolpath. I am sure it is some simple setting in eithet MASTERCAM or MACH3 but could someone out there pass along a little knowledge in this area? I am machining a 3d relief generated by MasterCam ART and it has some arcs in the x/z plane. I have MASTERCAM set to break arcs at quadrants but what Mach3 seems to do is interperets the original move plus a 360 degree circle which if its a gentle curve ens up with a big arc...some of these try and send the tool through the table and others in a loop the loop. Im Not a G code expert so Im not sure how to "fix" this.
Thanks in advance

Mike

23
Hey guys, I am getting an intermittant Limit Switch Triggered somewhere in my system, Seems to show up randomly when I am cutting. Is there anyway to determine which switch is causing the problem so I can replace it?
The signal is transient so it does not appear on screen long enough for me to tell which it is.

Cheers
Mike

24
General Mach Discussion / G43 Feed really SLow
« on: September 05, 2006, 06:52:14 PM »
What feed does the system use for a G43 Operation? When its performing this move its super slow and changing the feedrate on the screen does not affect it...
Mike

25
General Mach Discussion / Feedrate really slow when running a line with G43
« on: September 05, 2006, 06:51:52 PM »
What feed does the system use for a G43 Operation? When its performing this move its super slow and changing the feedrate on the screen does not affect it...
Mike

26
General Mach Discussion / Making an Input do Something
« on: September 03, 2006, 01:49:50 PM »
Hello All, I have been trying to get a couple of external inputs to work with my Mach 3 .. with little or no luck. The first is a feedhold button, I have it connected on a second paralell port using one of the CNC4PC new multifunction boards (Nice board BTW) I can see the input working on my diagnostics screen but I cannot get it to do anything. I have tried setting it to hotkey 32 (SPACEBAR) which is the PAUSE button on my screen but it does nothing..... I also have a STOP Button which I want to implement.. again same results... However there seems to be something not quite right with the stop button because I want it to activate the "STOP" button on the screen which is set as hotkey 2131 (ALT S) but when I try and set the Hotkey in my MACH3 inputs screen ALT-S comes up with 2163 not 2131... I have read through the manuals and the Wiki... and am more confused than ever...Any one have a simple step by step on making an external input Trigger an action...either an internal mach 3 function or an external macro?  It all sounded so easy... *grin*

Thanks in advance
Mike

27
General Mach Discussion / Tool Hieght Confusion
« on: August 29, 2006, 03:24:20 PM »
I am having trouble with my CNC, I am very confused by its behavior and I am at a loss to explain it. I have recently installed a new Spindle, I have run a simple bed-resurface(Cleans up or Sacrifical Bed)  of my machine and it seems to have worked correctly. Now the trick with this Spindle is it's a tool changing spindle and the whole offsets etc are confusing to my poor overloaded brain. I was sure I had it figured out but I have a simple operation which just trims some stop rails to the x & y Axis. I Set my tool Height, verified it twice and then ran the program, It ended up taking .15 deep cut out of the new bed, It thinks it is at Z0 but its not.... So I set it again, and I obviously got something really wrong because this time it just plunged right on in and buried the head....
   I tried using the Verify Button under the Manual screen but it does something funky as well so I cant verify what the machine really thinks the Z is at. Is there anything you can think of which could narrow this down.... I double and triple check the z height and the tool offset but they all seem right....
I am frankly baffled. If someone has some simple steps to help me narrow this down anything would be appreciated...

Confused and bewildered
Mike

28
Hello All. I have written a spindle warmup routine to baby my new spindle and I am having trouble making it work The code I have written is as follows
S6000 M03
G00 G90 X4. Y4. Z-2. F20.
X3. Y3. Z-1.5 F5 G4 P1500.
S12000 M03
X1. Y1. Z-1. F10. G4 P600.
S18000 M03
X1. Y1. Z0. F10. G4 P600.
S24000 M03
X2. Y2. Z-1.5 F10. G4 P900.
X0. Y0. Z0. F10.
M05
M02

Its supposed to start the spindle at 6000 rpm move to a spot wait 25 Minutes the move to a diff spot goto 12000 RPM wait 10 minutes etc.... What I Get is it starts moves to the 1st spot waits about 15 Seconds then moves to second spot and ran for about 55 minutes and hasnt done anything else..... and I did check to see what the dwell is set to in the config (its not milli seconds) Im preety green with g code perhaps I did a obvious blunder... anyone have any suggestions?

Mike

29
General Mach Discussion / Losing Position
« on: June 01, 2006, 04:28:46 PM »
Hello Everyone I have an issue I am trying to fix. I have a system which appears to be working well but during a large job it lost position on the Y axis by .2108 Inches. WHich by My Stardards is Waaaaay Out there. I have been trying to trouble shoot where exactly it lost position and what may have caused it. To date I havent noticed any other jobs losing position by that much so I am baffled why it would do so now. I am running some tests trying to re-create the problem so I know If got it.... I dont feel like risking another $500 chunk of aluminium to cross my fingers. But It seems that sometimes My Verify Does not function like it normally does. Worse case I want to be able to verify I am not out of position by pausing and verifying my position.but sometimes... not allways when I hit Verify it travels up to top of Z and then just goes back down and I dont get any Relavent feedback.... I havent noticed a pattern as to why or when this occurs so I am really at a loss... Anyone out there with any suggestions?

Mike

30
General Mach Discussion / MACH3 & Servos
« on: April 13, 2006, 10:37:24 AM »
Still relatively new to this whole Mach3 thing, but is Mach3 suitable for controlling Servo motors?

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