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Messages - wlarry

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General Mach Discussion / X axis driving down without command
« on: November 24, 2008, 10:12:18 AM »
I am running a plasma setup with THC-300.  Had the system working perfectly for several months then problems.  When the torch moves to the first cut, it senses the plate surface, and begins the cut. As the unit is cutting, the z axis is driving down.  If the THC is ON, it tries to counter the effect but by the second or third cut, the z has gone 6" and bottomed out. It does this regardless if the THC being on of off.  It appears as though the z axis is loosing track of its zero position. I can zero it at the start of a cut and by the time it had made 2-3 cuts, the z reading is out as far a 1.5".

Any thoughts ?

Thanks for the help Hood.  I did a re-install of MACH and everything seems to be behaving.  Can't explain what went on.

Thanks everybody for your help.

General Mach Discussion / Re: thc300 install
« on: August 27, 2008, 09:01:07 AM »
Make sure you go to views and choose which screenset you would like Mach to use(thc-300xx).  I encountered the same thing.  After installing the THC-300 screenset and you re-start, everything is blank.

General Mach Discussion / Stepper Motor Loosing steps - I think
« on: August 24, 2008, 02:11:47 PM »
My setup is a plasma gantry, A axis slaved to Y. Leadshine microsteppers, PMDX-122 breakout board.  My A axis is missing steps, and sometimes stalling but only in one direction.  Initially the problem developed when a program was finished and the gantry was heading for home.  The A axis would quit (just for a couple of steps)for a better word and the gantry would see/saw its way back to home.  Now the problem is happening during the program as well. No whining from the motor, just makes a clunk like a gear skipping on the rack and then resumes. I disconnected drive belt from drive and ran motor by itself - same issue. Misses steps only in one direction.  Travel speed is 250 in/min, accel 12 so I don't think I'm exceeding the motors capacity. Same motors on my X and Y axis with same settings - no problems. This has developed it seems over time.  I have been cutting parts for about three weeks now. Checked my connections, all seem OK.  Anybody have any thoughts.

As usual, fixing one issue caused another.  My A axis of my gantry is intermittantly loosing steps and only when travelling in one direction.  Initially had a lot of PC problems optimizing to get mach happy. So I upgraded to a Dell Optiplex 260.  I installed mach (latest version - tested) and the THC300 bitmaps and files.  When I open the THC300 set, the screens are missing buttons.  The program screen is missing the e-stop reset button, reference home keys and other screens are missing keys as well.  Tried to reinstall a couple of times - no change. Made sure thc bitmaps were coppied into bitmap directory - no  luck  Worked ok on the last system ? Anybody have any thoughts ?

G-Code, CAD, and CAM discussions / Defining two objects as one
« on: August 17, 2008, 06:56:12 PM »
Hopefully somebody can help me out.  I am trying to create a sign (plasma cut) of a horse, with text.  In corel X4, I can create the text sitting on a line and "weld" them together.  Sheetcam will recognize the text and line.  When I try to add the other object, sheetcam doesn't see it.  Does anybody have a step by step "idiots guide" to creating simple signs with pics and text ?

General Mach Discussion / Re: Where is rapit move speed set ?
« on: August 14, 2008, 11:13:35 AM »
Thanks guys.

General Mach Discussion / Where is rapit move speed set ?
« on: August 13, 2008, 09:14:01 PM »
When my gantry does a rapid move, where is that speed setting coming from ?  I'm using sheetcam, I can set the cutting speed there.  There must be a default setting for rapid move speed - where ?

Thx ???

General Mach Discussion / Re: Where to find Mach configuration file.
« on: August 01, 2008, 10:34:37 AM »
Thanks very much - very helpfull as usual.

General Mach Discussion / Where to find Mach configuration file.
« on: August 01, 2008, 10:08:31 AM »
I had a power failure the other day during an electrical storm.  When I fired my PC back up and started MACH, the cofiguration was all wrong.  Had to recal motors, redesignate inputs outputs etc.  Once I have everything back to where it should be, is there a file or files that I can put on disk to load incase this happens again  ???



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