Re: [CAD_CAM_EDM_DRO] Re: Newbie questions???????

Be very careful when using the mach3 single block feature. There is a known bug. What I have found is that if you single step through a program and then return to continuous mode that something get messed up in mach3 and then it runs the rest of the program at usually the rapid traverse speed. I have lost a few cutters using the single block mode then switching back to continuous. Yesterday running a single block command then using the run from here feature caused my servo operated knee to rapidly to some unknown position before I could kit the estop. The was no Z axis movement called for in the G code file. I replicated this twice so I would say stay away from the single block mode. Art and Brian are aware of the first problem and I'll post a bug report on the yahoo group later today.

Dan Mauch
economical 3D scanner software and kits
low cost stepper and servo motors.
cases for Gecko drives
kits and assembled 3-4 axis drives
www.camtronics-cnc.com
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----- Original Message -----
From: Will
To: CAD_CAM_EDM_DRO@yahoogroups.com
Sent: Saturday, January 05, 2008 12:27 PM
Subject: [CAD_CAM_EDM_DRO] Re: Newbie questions???????


To tell the operator the hole depth use parenthesis to make a comment.
Comments will show up in the status bar on Mach 3. For ease of
programming I would just run the program on single stop. On a
prototrak feed moves (G1) are done continuously while rapid (G0) moves
are made in a single block fashion. In mach3 you can make a M code to
switch between the two styles.

Ex.
TXM6 (.156 Drill)
M100(Switch to single block)
G0 X1. y2. (Drill to Z-.1)
X2. (Z-.1)
X3. (z-.5)
M101 (Turn off single block)
.....

>A sample of the code that I would consider is:
>
> G81 X1.0 Y2.0 Z-.1 R.1
> M0
> X2.0
> M0
> X3.0
> M0
> G80
>
> The Z value is required for the cycle, and will give the operator a
> visual display of the programmed depth, even though no Z axis is
> available. The program stops at each M0, permitting the hole to be
> drilled. Cycle start positions to the next hole.





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