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Topics - jkountz

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1
General Mach Discussion / Job not visible in Table display
« on: January 10, 2014, 08:51:25 AM »
I tried to find a solution for this but didnt have much luck. Im posting a screen shot of a simple piece of gcode Im using for testing purposes while I get my machine setup. The problem is the job appears way off screen in Table Display. If I go back to Vcarve and set the origin to the bottom left then recalculate the toolpath, save it then bring it up in Mach it appears correct. Now this is easy enough to do on files I create but Ive gotten a few from the internet that the origin was set in another corner or the middle even and I cant get it to appear correctly in Mach.
Is there a way to fix/edit the code/files so they are sit on the Table correctly?

2
General Mach Discussion / Problem with Probe and Home switches
« on: January 08, 2014, 11:48:31 AM »
I am trying to setup a probe and my home switches on a Momus cnc machine Ive just finished building. I connected a wire to pin 15 and another one to 5v on my BOB. right away I start to hear an odd hum and when I touch the two wires together the machine goes crazy, grinding and trying to move. Its really rough sounding. I break the connection and it goes away. Ive tried active high and low and it still does it.
I tried connection a home switch to my X axis and I get a similar thing happening there too. So I did a little investigating into the problem. I found if I just connect a single wire to ANY input signal then I touch that wire to any metal on the machine it does this crazy grinding moving thing. It even does it through me, meaning if I touch the end of the wire the touch the machine with my other hand it does it just not as harsh.
This is driving me nuts, Ive checked all the common things like my gound on the power side of things, I used shielded cable throughout the machine too.
I do have some of my signal wires from the BOB running alongside some of the wire from my power supply to my motor drivers, but I thought since everything is shielded this wouldnt matter. Maybe it does?
Any suggestions??

3
General Mach Discussion / Strange movement behaviour
« on: December 01, 2013, 08:17:53 AM »
Hey all, new to the forum here. Im building a Momus 2.1 CNC router and have had my share of the building woes. The latest of which really has me stumped and its very weird.
I can move my Y axis just fine by itself. I can move my X axis fine by itself. The trouble starts when trying to move them together. If Im manually jogging the machine the Y is fine. The X will move in the positive direction but will not jog in the opposite direction unless I nudge the Y positive just a bit. I know Im not doing very well explaining here but I guess the easiest way to say it is, I cannot get the X to return the other direction unless I FIRST move the Y a bit in the positive. Weird right? I can move the X all day back and forth until I move the Y in the negative, then the X will only move one direction. If I then nudge the Y positive, the X takes off again.
Im suspecting my BOB since I have had some other troubles with it and it is the cheapo one that comes with a 3 axis kit.
My setup is as follows:
DM524 drivers
425 oz/in Nema 23
Mach 3 Trial ver. (Waiting for Mach to send me my License code)
Windows 7 32bit
1.6 Duo core: 2 GB ram



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