Machsupport Forum

Mach Discussion => General Mach Discussion => Topic started by: sully3535 on May 14, 2010, 04:34:24 PM

Title: Machine goes crazy
Post by: sully3535 on May 14, 2010, 04:34:24 PM

I write the g-code with BOBCAD and when I try to run it with MAZCH3 it goes to the start point and dives deep into the material.
Any ideas why?

Title: Re: Machine goes crazy
Post by: Hood on May 14, 2010, 05:17:28 PM

Most likely are the code is calling a Tool length offset or a Work Offset.

Hood

Title: Re: Machine goes crazy
Post by: jeeplogic on May 15, 2010, 07:01:14 PM

BobCAD never really really got the post processor thing down for Mach. I drew a square in bobcad then posted it to mach using there post and it came out as a jacked up triangle that's when I bought sheetcam.
Greg

Title: Re: Machine goes crazy
Post by: khalid on May 16, 2010, 07:39:42 AM

It seems that Code is right but your z-axis DIR pin setting is reversed...Just Set the Direction Pin Active High if its Active Low in Mach3..

Normally in Gcode, the Z-axes goes up first at safeZ and then goes down.. In your case it goes down and making all the code as Mold..

Title: Re: Machine goes crazy
Post by: sully3535 on May 16, 2010, 09:51:18 AM

It runs fine for a few runs and then it goes crazy. I run one piece and then the next same piece dives down. The code looks right.

Title: Re: Machine goes crazy
Post by: Hood on May 17, 2010, 01:59:44 PM

Does the Z Dro show the position the Z is at when it has gone crazy?
Hood

Title: Re: Machine goes crazy
Post by: Arch382 on May 18, 2010, 07:19:23 PM

I just came to this forum because of the same problem. I'm programming my g-code in Onecnc and for the most part is great. Once in a while when a part finishes, it dives into the table and crashes the z axis as if it is homing to another position. I'm ruining expensive little inlay bits. Please someone help!  :o

Title: Re: Machine goes crazy
Post by: sully3535 on May 18, 2010, 07:48:37 PM

I think I figured my problem. Loose wires on control box.

Title: Re: Machine goes crazy
Post by: Hood on May 19, 2010, 10:26:04 AM

Quote from: Arch382 on May 18, 2010, 07:19:23 PM

I just came to this forum because of the same problem. I'm programming my g-code in Onecnc and for the most part is great. Once in a while when a part finishes, it dives into the table and crashes the z axis as if it is homing to another position. I'm ruining expensive little inlay bits. Please someone help!  :o

Does the Z DRO correspond to the actual position when it "dives" into the material?
Hood

Title: Re: Machine goes crazy
Post by: Garyv on May 29, 2010, 09:14:51 AM

I have the same type of problem IF I edit the code or jog around to set up a work piece before cutting,, What I have found is that
I will do a dry run (without the CNC active) in MACH do my editing after watching a new program run ,THEN close the G-code file ,Then
close MACH , And pull up and all will run fine , but if I edit the code or change ANYTHING I will shut everything down and re-start or it will crash.
  I have had this problem from the start and seemed to have got worse after using the smoothstepper . Dont get me wrong I love the smoothstepper
but I make sure to re-start after any type of change to the program.. Oh and also mine will show the DRO going to -.750 without that even being anywhere in the code file..
Just my 2 cents worth..
Gary