Messages

11

General Mach Discussion / Re: When my CNC router is moving with the G Code it is jerking with each line!!!!

« on: July 23, 2011, 01:24:22 PM »

Try this action, may help...
Diselect the option Config->Toolpath->Tool Position

I have seen jerking movement because of this in the past.
John

12

General Mach Discussion / Re: Backup on Path for Plasma and Waterjet

« on: June 14, 2011, 04:12:31 AM »

Sounds very strange to me, while i never faced such problems.
I have found some solutions and i would like to share.

You can create 2 macros. One for starting the plasma arc and one for switching it off.
You put them in your code for starting and stoping the plasma arc.
It's not necessary to place them manualy inside the code. (You can touch the post processor of your nesting software).
The first macro also reads the "piercing time" from a DRO and waits until this time ends. Then starts the motion.
Also you create a button which executes this macro.

The program starts normally and can switch ON and OFF the plasma arc at the start and the end of a shape.
Now you have come to a point where you have lost the cutting. Press pause. Hit "run reverse". Hit pause again to stop reverse.
Press the button which executes the first macro. The plasma arc starts at this point exactly where you have stoped.
You don't have to go the start of the line, or start the plasma arc while moving.

So, finaly, yes, Mach3 can "backup on path".
The only "problem" i can see is that the pause button is not immediately executed, while Mach buffers the motion commands.

Hope that helps...
John

13

General Mach Discussion / Re: Backup on Path for Plasma and Waterjet

« on: June 13, 2011, 01:40:03 PM »

If you don't use "kerf compensation", then you are able to go back in the path (fully back untill the start of the program).
To do that you should include at the start of your code: G40 (cancel kerf compensation).
The procedure looks like:
1. You hit "pause" button (wait until the machine is stoped - also "plasma start" command will be deactivated)
2. Hit "reverse run" (the machine goes back on the path)
3. Hit "pause" button again to stop reverse running.
4. To start the plasma arc again at this position, you can create a button that will activate "start plasma" command,
    will wait until the plate is pierced and will start forward running.

Hope that helps...
John