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Messages - Bodini

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51
General Mach Discussion / Re: Z axis moves down after program ends
« on: December 14, 2013, 01:12:10 PM »
Show us the Goode for the problem arcs.

52
General Mach Discussion / Re: Z axis moves down after program ends
« on: December 14, 2013, 09:58:52 AM »
My Z axis moves very freely. When I reach the end of the G code program the motors shutoff and the z axis will move down which will lose my z "0".

Do you mean that the steppers/servos turn themselves off when it gets to M30?

That would lead me to think that you have this option selected:  Mach3> [pulldown menu] Config > General Config > Pgm End or M30 or Rewind > E-Stop the system.

If you have that box ticked, un-tick it.

53
G-Code, CAD, and CAM discussions / Re: M0 and M2 command
« on: December 07, 2013, 01:15:38 PM »
What is the M2 on N60 for?  I had to delete it just to get Mach to load the gcode.

so that the machine will stop after making that peck.  I pull out the part and then measure to see that everything is in the right location ( centered) put the part back in adjust my DRO's and hit cycle start for the program to continue.    I didn't have to delete that. 

Well if it works for you, then so be it, but.... as far as I've read:

M0 = stop with no questions asked.
M1 = stop if the Optional Stop LED is activated
M2 = END the program
M30 = END the program and REWIND

M2 or M30 are intended for the last line of the gcode.

54
G-Code, CAD, and CAM discussions / Re: M0 and M2 command
« on: December 06, 2013, 01:16:48 PM »
What is the M2 on N60 for?  I had to delete it just to get Mach to load the gcode.

55
M98 (SubName.tap)   to call an outside sub.

Ah ha!  I remember that now but I never had much luck with it loading the outside file.  I ended up just using subs inside the gcode, which is a thing I still use daily.

Addendum: Thats why i said I'd 'limit it to a few lines of code' in previous post.  (Previous failed experience) ;-)

56
Gocde Programs with outside subs work just fine in mach 3

Interesting! How do you call an outside sub?

57
VB and the development of wizards /
« on: December 04, 2013, 03:43:31 PM »
How much gcode are you talking about? You could call gcode from a macro, but id only use that for a couple of lines.

58
VB and the development of wizards /
« on: December 04, 2013, 03:15:54 PM »
I dont think so. Like u said, sub routine is about as close as u can get.

59
General Mach Discussion / Re: Closed loop control using encoders?
« on: December 04, 2013, 01:09:28 PM »
I have closed loop (encoder feedback) on 3 of 3 machines and feel uncomfortable without it.  I use it as an alarm to tell me something is wrong with the machine.  When closed loop is telling me that things aren't right, I investigate and resolve the issue.  Encoder feedback runs through a plug-in and ESTOPs when the difference between commanded position and encoder position exceeds the tolerance.

60
Show"N"Tell ( Your Machines) / Re: Zero gravity Z
« on: December 02, 2013, 05:22:59 PM »
Lifespan is qouted at about 100,000 full strokes.  Mounting position should be shaft end down so seal gets oil. One of mine is up and one is down, and my arrangement puts some side load on the shaft. So I expect the life of one of them to be quite short. So we'll see, but a replace once a year or so wouldn't be too awful.

I used to build pneumatic packaging machinery using cylinders like you used.  I did away with lubricators because they made more mess than they did good. However I always shot a bit of air lube oil in both ports on the cylinders before attaching the lines.  You can get 3 to 5 million stokes on those cylinders. We easily put 5 million strokes on in a year.
I did put a squirt of oil in there when it was new, as I had read that somewhere (was it you? :-) ).  Yes, I can see a lubricator making a mess all over the work under it as I have the cylinder mounted.  I just looked and that cylinder was $39.97 from McMaster (http://www.mcmaster.com/#6498K861) so like you said, replacing it wouldn't be a big deal.  5 million strokes a year;  I use mine quite a bit, but will never see that in a lifetime!  Thx for the input.

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