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General Mach Discussion / Re: Physical buttons for plasma
« on: January 27, 2016, 10:51:36 AM »
Robert you commented on teh lost steps. The probem with lost steps in Z is that Mach3 does not know it happened and THAT alters where it thinks Z actually is. Normall it makes it think the teh Z is HIGHER than it actually is so when the Torch head goes to cycle and the next cut it drives the torch into the metal.
NOW if teh Z motor had an encoder for position you could fix that via software and correct teh position before it caused a problem.
As to adjusting teh Torch parameters long ago I used small steppers attatached to teh Amp knob and to teh pressure regulator to adjust teh machine settings on the fly. The problem was EACH curve in teh toolpath required a different setting based on the dynamics of the curve. High end machines can calculate that on teh fly Mach3 would not stand a chance there, and did not (;-). It may be possible for Scam to do it in CaM BUT with all teh changes the Gcode would be horrible. AND you still would not get much improvent if any in cut quality.
You idea on speed changes is interesting BUT I don't think you will never get it to work at teh macropump level it s FAR to slow. You MAY be able to do it at teh Plugin level where you have access to a higher sampling rate and process speed.
But in reality what have you gained IF you never cut at Very HIGH SPEED or cut highly warped sheets . Mosst of teh DIY tables I have seen are not rigid enough for high speed cutting. The high accel rates jerks the table around to much causing poor cut edges.
I emailed JIM as to the NEED for a different rs485 board and the first round of the conversation was all Standard HT sales GibberJab and totally talked around the need. (;-) I rephrased the question and tried again .
Worse case senario we hack into teh Motherboard and use a port sniffer to get the protocal then talk directly to it OR yous guys can develope a RTU modual to talk to it.
(;-) TP
NOW if teh Z motor had an encoder for position you could fix that via software and correct teh position before it caused a problem.
As to adjusting teh Torch parameters long ago I used small steppers attatached to teh Amp knob and to teh pressure regulator to adjust teh machine settings on the fly. The problem was EACH curve in teh toolpath required a different setting based on the dynamics of the curve. High end machines can calculate that on teh fly Mach3 would not stand a chance there, and did not (;-). It may be possible for Scam to do it in CaM BUT with all teh changes the Gcode would be horrible. AND you still would not get much improvent if any in cut quality.
You idea on speed changes is interesting BUT I don't think you will never get it to work at teh macropump level it s FAR to slow. You MAY be able to do it at teh Plugin level where you have access to a higher sampling rate and process speed.
But in reality what have you gained IF you never cut at Very HIGH SPEED or cut highly warped sheets . Mosst of teh DIY tables I have seen are not rigid enough for high speed cutting. The high accel rates jerks the table around to much causing poor cut edges.
I emailed JIM as to the NEED for a different rs485 board and the first round of the conversation was all Standard HT sales GibberJab and totally talked around the need. (;-) I rephrased the question and tried again .
Worse case senario we hack into teh Motherboard and use a port sniffer to get the protocal then talk directly to it OR yous guys can develope a RTU modual to talk to it.
(;-) TP
