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Messages - mhdale

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111
General Mach Discussion / Re: Tool Hieght Confusion
« on: August 30, 2006, 10:52:16 AM »
SOunds like a Really good Idea! I will check them out and let you know if it helps with my issues.
M

112
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

113
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

114
General Mach Discussion / Re: Losing Position
« on: June 02, 2006, 09:17:02 PM »
Brian,
 If you Interrupt a program can you do a verify position without screwing anything up? Is that possibly whay it seems to not want to run the verify?
Mike


115
General Mach Discussion / Re: Losing Position
« on: June 02, 2006, 06:42:38 PM »
Pulse width is set to 4. But would that not show up all the time? What sort of symptoms would having a pulse width to short have on the overall accuracy of the system? This one has me stumped and very nervous about doing large jobs.....
I do appreciate your assistance and insight and anything I mean anything you can think of which might explain why it would lose position over a long job as opposed to same job cutting air with much higher feeds rates and less depth cuts...which I would think would tend to exacerbate the loss of position.. but did not.

Cheers

Mike

.


116
General Mach Discussion / Re: Losing Position
« on: June 02, 2006, 01:10:15 PM »
Brian,
 I am running a Custom Built Stepper system running Pacific Science stepper drives & Motors with Mach 3 running on a P4 2.4G with 512 Ram and nothing else. I did have the screensaver on (Dont know why).
My big concern is that I have been unable to duplicate the problem, I.E. I have run a condensed version of the same program with less depth cuts and at a much faster feedrate to try and see if there was a motor setting or something and I cannot get it to lose position....also I cannot see any part of what it did machine where it might have gotten caught up .. everything looks perfect except that it gradually lost position on the Y axis....
Can you shed any light on the verify position behavior? If I can count on the verify position I can step through the job one section at a time.... painfull but at least I can get it done.
Thanks in advance
Mike

117
MJR
  My company is in Calgary and we use Mach 3 to control our CNC system. Right now is not a great time but june 6th on I may be abloe to give you some advice etc. Drop me an email I would be happy to assist.


miked@bdtfx.com

Mike

118
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

119
General Mach Discussion / Re: MACH3 & Servos
« on: April 13, 2006, 04:06:18 PM »
Thats all I needed to know thank you! I may be retrofitting an older CNC for a friend but I was unsure of the motor system because it is currently servo... and I dont think he wanted the extra cost re-fitting thye system with new motors.

Thanks for thie info!
Mike

120
General Mach Discussion / Re: MACH3 & Servos
« on: April 13, 2006, 01:48:32 PM »
Very cool! Looks like a really good resource, thanks for the Link! I see near the bottom a couple of Servo based systems so I guess that must be a yes? I assume, that it is more a factor of the motor controllers than the motors themselves...is that the way of it? I am not sure how servos systems work as I have only really worked with the Stepper systems.


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