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Messages - mdash

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General Mach Discussion / Toggle Outputs with No Interuption to Motion
« on: December 04, 2008, 04:02:33 PM »
Is it possible to turn on/off an output (from the g-code via an m-macro) and not interupt the constant velocity?

I'm cutting circles in plasma, and to get a perfect cut I need to be able to switch off the torch a few mm before the end of the cut.
The CAM software can calculate this just fine, and break the circle into arcs and place an M code at the appropriate point.
However this causes a slight pause as the cnc decelerates, executes the M-code (to turn off the torch), and then re-accelerates to finish the cut.

M1000  ;Turn off output
G1X12 ;Finish cut

If this is executed without the M1000 there is no delay (no decl & accel).

Any ideas on how to achieve this?

LazyCam (Beta) / Offsetting using Plasma post with G41/G42
« on: December 20, 2007, 02:41:26 PM »
I have a dxf that if I bring in and use the mill mode, posts fine.
It outputs the G41 and G42 offsets with the tool chosen.

However, if I try to get it to do this using the plasma mode, I get no G41 or G42s.

It is possible to specify a kerf in the Plasma mode?

General Mach Discussion / Set Machine Coordinates in VB or G-code
« on: July 18, 2007, 03:08:34 PM »
Is it possible to set the machine coordinates to a desired value (without homing the axis)?

I have tried SetOEMDRO(1024,some_value) but the Machine Coord DRO is read only.

I have also played with #5161, G10, G52, G92.  These all only affect the Workoffset.

If it is not possible I will just have to settle for using G52 to compensate.

I have a machine that has 8 axis. 
I can use two LPT cards - which gives me enough I/O for 8 axis, but Mach only has 6 axis at a time.
I want to be able to switch the port or pin number given axis during a job, thus changing the physical axis being controlled.
Is this possible? (or do I need to do it at the electronics level)?

JetCam screen designer / JetCAM
« on: September 28, 2006, 11:19:12 PM »
I am having trouble wiht JetCAM.  The screen looks great in JetCAM, but when I open it in Mach3, then all the buttons are doubled!  They show up side by side to each other.  Any ideas?

General Mach Discussion / Event Driven Serial Control
« on: September 28, 2006, 10:30:39 PM »
I would like to use Mach to control a serial io card I made.  However I can find very little about how to use the event driven serial control.  I did find a few posts about using fifo.  Is there somewhere that I can find more details?

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