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Messages - BluePinnacle

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81
General Mach Discussion / Re: parallel port help
« on: May 06, 2012, 08:18:35 AM »
Nice to have, not essential. You can pick up the safety pulse on pin 1 using an earpiece for example. And a 20 year old scope in good condition would be fine.

Do you have the port address set up properly?

If the chipset really won't play then an add- on parallel card may be the answer . We find the Moschip based cards work very well for our purposes.

82
General Mach Discussion / Re: parallel port help
« on: May 02, 2012, 05:33:00 PM »
You will see it better on an oscilloscope if you have one, can you get a clean on/off output at the spindle's assigned pin?

83
General Mach Discussion / Re: help please
« on: April 26, 2012, 07:53:58 AM »
check your wiring and switches for cracks, damp and coolant, any conductivity will show up as a triggered switch and drag the pin voltage down.

84
General Mach Discussion / Re: touch probe drawings
« on: June 26, 2011, 07:44:56 PM »
http://www.machsupport.com/docs/SW_Digitising_Probe.pdf

Looks like it should work.

I'm designing my own with an overtravel switch which will kill movement by triggering the limit circuit.

Probing and overtravel need two conductors each in the cable, I would suggest using a six-pin connector at the machine and fitting a dummy connector to it when not in use. The dummy connector has all three pairs shorted (1 to 2,  3 to 4 and 5 to 6) to enable normal operations. pair 5-6 enables the spindle and the probe's cable has these permanently open to prevent the spindle running when the probe is attached. This is my strategy. If and when I get the thing developed fully I'll share the results here.

85
awesome thread necro btw. Going on six years.  :-\

86
Mine was working a couple of days ago.

87
General Mach Discussion / Re: Spindle speed fedback?
« on: June 20, 2011, 10:07:38 AM »
Shame :(

Hope you're feeling better by the way.

88
General Mach Discussion / Re: Spindle speed fedback?
« on: June 19, 2011, 08:19:01 PM »
This looks like the beginnings of turning the spindle into effectively a big servo. Doing this with my mill spindle would enable rigid tapping ... I like that idea. Distant dream, or not?

89
Could be that, I detuned the motors a little and made a point of pumping the oiler and exercising the slides first thing and it hasn't happened recently. The toolpath showed the correct position along with the DROs. The other embuggerance is an occasional runaway of the X and Y axes - the DROs update slowly, about once every two seconds, and simply show rapidly rising (or falling) values carrying the tool along an uncommanded 45 degree path as fast as it will go. The toolpath shows it going, but makes no effort to stop it. Nedless to say, not good. I solved this once by leaving G41 on between subroutine executions instead of cancelling and reapplying it each time, but it's come back in a different program. Do I need to cancel G41 before using G0 or is this something else? It's a horrendous error and not one I want to repeat.

I don't think it's a HDD failure as the computer is nearly new and fairly decent in other respects. There have been no bothers such as slow booting or hanging.

90
I've had a persistent, if intermittent problem with Mach3: My Z axis tends to get carried away and plunge too far (or not retract fully). The results are as dire as you'd expect - Ruined work, lost time and broken tools. I've got a hole in the top of my vice with an expensive 8mm cutter snapped of in it from the last episode. This isn't something I can reproduce as it only happens infrequently. Any clues on this? I'm getting a bit paranoid about it since I've got some big milling jobs to get through shortly and I don't want them going wrong.

The other point that may be related is that Mach occasionally seems to skip instructions or stop short of a finishing point. This is usually when approaching the end o a cut with a G41 offset on - instead of continuing to the end of a a cut it stops significantly short before lifting the spindle. The only way i can correct this is by programming the same line twice.

Again, any clues on this? This BS is giving me ulcers just thinking about it  ???

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