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Messages - stirling

671
I know of NO external motion card that supports THC. AFAIK it's parallel port only.

672
Fix what?

673
VB and the development of wizards / Re: ismoving() error message
« on: July 21, 2013, 05:12:22 AM »
I would hazard a guess that the "call" for M4 may be the problem. It's a no no to call a macro from a macro.

Ian

674
General Mach Discussion / Re: velocity /accel
« on: July 21, 2013, 04:49:35 AM »
jwhit - please don't double post - it just wastes everyone's time.

Thread locked.

675
Mach's full THC capability only exists in the parallel port driver.

Ian

676
VB and the development of wizards / Re: VB execution Speed
« on: July 21, 2013, 04:29:16 AM »
how can i stop the machine in the middle of the movement?
let's say that i gave this command from script Code "G0 X500 " and now i want to stop the machine because the probe hit the object

You can't. That's why the gcode fairy gave us G31.

Doing the code in G CODE allows Mach3 to USE the look ahead buffer to an advantage.
Interesting comment Terry. I fail to see how the planner can lookahead over a G31 when by definition it has no idea in advance where it's going to stop?

Ian

677
VB and the development of wizards / Re: VB execution Speed
« on: July 20, 2013, 04:32:25 AM »
By it's very nature a probing routine is a series of very short moves and direction changes and therefore will always be "slow" - that's the nature of mechanical digitizing. Trust me - the script engine is running waaaaaaaaaaaay faster than your machine ever can - it (the script) will be spending most of it's time doing nothing whilst it waits for the machine to catch up.

OK - you (might) say - but if I CUT a shape made up of lots of small lines it cuts faster - why? - that's because Mach is a "planner" i.e. it has the ability to "lookahead" but it can't "plan" (dynamic) digitizing moves because each move has to be calculated on the fly based on the result of the previous probe result. That said, even a "non-dynamic" regular bed of nails probe can not be planned either for obvious reasons.

Ian

678
General Mach Discussion / Re: spindle load feedback to mach3
« on: July 19, 2013, 12:01:09 PM »
I will certainly be doing this when/if Brian ever gets his finger out his arse
What!!! - You mean he's typing one handed?  FM - that's gotta slow things down alright ;D

Ian

679
General Mach Discussion / Re: spindle load feedback to mach3
« on: July 19, 2013, 11:14:19 AM »
The .. is a programmer (spit!) thing for range.

The idea was just to bias (add to) your input (-10V..+10V) to make it 0V..20V (still the same range (20V) but all +ve). Then just divide it by whatever to give you your ADC input range. So let's say for example your ADC is 10 bit with an input range of 10V. You just divide by two and then feed it into your ADC then map the ADC output in software (Brain/macro whatever). So an ADC value of 0 would map to your original -10V, 512 to ~0V and 1023 to +10V.

Me - I love this weather - 7 freaking years since last summer!  ;D

Ian

680
General Mach Discussion / Re: spindle load feedback to mach3
« on: July 19, 2013, 10:36:58 AM »
If I had a clue what you were talking about I may agree ;D
Hood
It's the heat you know - I spec you're still up to your oxters in snow up there right?  ;D