Machine goes crazy

[sully3535]

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?

[Hood]

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

Hood

[jeeplogic]

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

[khalid]

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..

[sully3535]

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.

[Hood]

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

[Arch382]

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! 

[sully3535]

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

[Hood]

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! 

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

[Garyv]

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