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Messages - BR549

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6581
General Mach Discussion / Re: Macro deactivate thc up and thc down
« on: July 05, 2010, 08:36:51 PM »
That type of operation would have to be done through a plugin to mach.

6582
General Mach Discussion / Re: Upgrade , is CV better?
« on: July 05, 2010, 07:05:04 PM »
(;-) Good Idea

6583
General Mach Discussion / Re: Macro deactivate thc up and thc down
« on: July 05, 2010, 07:01:12 PM »
Sorry I don't quite get what you mean by

" when thc does not disable the delay in drilling" All the THC does is move the z up or down based on tip voltage compared to set voltage

6584
General Mach Discussion / Re: Dual function for MPG?
« on: July 05, 2010, 06:57:27 PM »
There IS a video in the video section(;-)

6585
General Mach Discussion / Re: Upgrade , is CV better?
« on: July 05, 2010, 06:42:48 PM »
I think the newer installs allow you to build a complete new profile so you do not have to move anything. Or did I miss something(;-)

6586
Rene, you can use any ABC axis as the slave. BUT you can only use A as interpolated moves with XY.

SO I would stick with A as your needle control. That way you can control the stitch length with extreme precision AND be able to make coordinated XYZ moves to the next stitch point and that saves time in the cycle. when the XY arrives at the next stitch point the Needle will already be in position to stitch without delay.

You may have to set the MACH kernal freq as fast as your computer will allow. Then set the A stepper motor to 200 steps per 1 rev of the motor. Next go to the axis tunning and set the accel up to as fast as the stepper can move without loosing steps. Next set the vel to the same number to start with.

Now go to the mdi screen and type in an A move say G0 A180  to see how fast it can move 1/2 turn.  Next go to the setting screens Top LH side and set the Aaxis value for A axis radius correction to .001 that should make the axis move in feedrate sync with the XY OR is that 999 heck just try both to see which is faster.




6587
General Mach Discussion / Re: Dual function for MPG?
« on: July 05, 2010, 06:21:10 PM »
In a brain I think I would input the MPG count and use a divisor(depending on the counts per of the MPG) on the number to make the ouput have more resolution and make the FRO react slower to MPG input.

Then route that number out to the FROdro "IF" a condition was met say an input is active as you require. That way you can turn it on and off when needed. You could also use an LED and turn it off from the Keyboard or Hotkey.

6588
Frog I am sure you know CNC rule#1 so we won't go there.

I do not know of any mach error code to trap VB syntax errors on start, OTHER THAN making sure you debug it fully before you run it.

There IS an error trap for VB during run time but it will not run until the VB loads correctly first. On trapping internal errors you can direct it to message you then do whatever you want it to do  STOP,Estop Hold, etc etc

On Error        

6589
General Mach Discussion / Re: Usefull macro for oxy fuel
« on: July 05, 2010, 03:25:12 PM »
OXY/Fuel works just like plasma. You just have to have valves to turn on the OXY/Fuel and a valve for the cutting oxy flow and a relay for the ignitor.

THen move to position lower to preheat height dwell for preheat then turn on cut OXYflow and cut. At cut end turn off the CutOXY/flow raise torch move to next cut and repeat.

6590
Rene the total lines of gcode have little to do with it. Mach can be "extremely" fast in Gcode output. Usually MUCH faster than the machine can actually move.

The problem is when you mix VB(extremely slow) with gcode in areas of MOTION control.

SO IF you want speed then you need to consider a GCODE ONLY approach to the machine

When using the A axis  there are things to consider to get fast responce. ONE is that the axis is setup as Degrees per min. SO you need to setup the axis to be as fast as possible with a large enough motor to avoid lost steps. Next you have to run the accel values very high and the Top velocity only as fast as the accell values will allow.  Accel is more important than top speed as you will rarely be at top speed. But you will always be accelerating/decelerating.

The A should be able to run JUST as fast as the other axis but remember it is not moving far 1 rev at best so to get better accel values it may be necessary to gear the stepper down to have more available torque to get the mass moving.

Next you have to tell mach what the diameter of the A axis control point is so it can SYNC the feedrate to both the XY and A and still get fast movement. Otherwise Mach will only move as fast as the slowest axis normally A


AS to resetting A to zero? it is not needed.

Look at the Gcode I posted above your stop start points are just deg points in the A axis.  From the needle up position A0.000 the code can do XYA moves to get to the stitch position. Then from that point you do a stitch move to the next A position (needle clear of fabric) then from that point you can do another ZXA move to take A back to the zero point(shortest route) that keeps the stepper moter moving in the same direction of rotation for the sewing head. THen from the needleup point A0.000 the cycle starts again.

Never does the A need to be reset to zero.

Mach can do these moves very very quickly IF you have the proper equipment

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