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Messages - BluePinnacle

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31
I'd just write it by hand, but then I write everything by hand.

32
General Mach Discussion / Re: Have I been had?
« on: May 24, 2018, 10:23:39 AM »
In fairness to Microsoft i think we're the only ones still using it, unless anyone else knows better.

33
General Mach Discussion / Re: Have I been had?
« on: May 22, 2018, 11:31:45 AM »
the official line is you should go for Mach4. I would support this purely on the grounds of future-proofing as Mach4 is altogether a more sophisticated and capable product (As far as I've seen). It's almost a complete rewrite with very little of Mach3 carried over. So yeah. mach4  ;)

34
General Mach Discussion / Re: Understanding Mach3 pulses
« on: May 22, 2018, 07:43:19 AM »
 ;)

35
General Mach Discussion / Re: Understanding Mach3 pulses
« on: May 22, 2018, 05:57:58 AM »
A word of warning, after fifteen years or so I wouldn't say that I had arrived yet  ;D

36
Dave - Assuming there's just one wire to trigger the torch arc/air then yes - kind of - but the OP reckons it will fire properly if it is triggered manually which is ... odd.
I wonder if not enough current is getting through that part of the circuit to trigger it fully?
I'm short on guesses, it's harder to get into the details of it without a schematic of some kind. Is one available?

37
Bad contacts in the relay? Try swapping it out for a new one.
If it will fire manually by triggering it downstream of the relay then suspect the relay. Do you have one contact for air, one contact for plasma or is it all on one pair of contacts?

38
General Mach Discussion / Re: X and Y Alignment
« on: May 09, 2018, 09:55:15 AM »
I stayed in Akaroa a few years ago, it's a lovely area.
Back on topic: I don't think I've ever used MDI. I'm making a new screen set and I may leave that page out altogether.

39
General Mach Discussion / Re: Strange hole problem
« on: May 09, 2018, 08:49:21 AM »
Strange. I haven't got a plasma unit but both toolpaths display just fine in my Mill profile.

One thing that I have seen happen is that mach3 can behave badly with full circles - Try redefining the G03 movement in line 190 as two seperate 180 degree arcs in order to force the thing to do a complete circle.

40
General Mach Discussion / Re: Setting up limit switches, Mach3
« on: May 09, 2018, 08:24:17 AM »
^ Great reply from Joe as usual. It looks like your actual limit switch inputs are currently disabled so you'll need to activate that and run something into that pin.
Inductive proximity sensors are usual for home switches, and sealed NC microswitches are usual for limits. My machine is set up like this with the homes almost at the maximum + direction of each axis - The limits are at the absolute maxima.
I've used a series loop for all six limit switches so that all the switches trigger one pin. It makes very little difference operationally speaking and uses less wire.
Noise can be a problem on home and limit circuits so it's worth letting a nominal current through the loop (say 50mA) by fitting a decent pulldown resistor to the pin and 0V. This ensures that when the pin is held high by the power supply to the switch loop there is little enough loop resistance that any noise trying to pull the pin voltage down will make no difference, and when the limits are triggered the pin falls to 0V promptly and can't float up or be driven high by spurious signals. It's a common strategy in antenna controllers where long wiring systems may be subject to electrical interference, noise, microwave pulses and other mischief. How you implement this on the home switches will really depend on the sensor you use but it's just as important.

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