Messages

1

General Mach Discussion / Re: Help! Mach 3 glue dispenser !!

« on: July 23, 2017, 06:16:36 AM »

Great! I'll follow that up.. Thanks for your reply!

2

General Mach Discussion / Help! Mach 3 glue dispenser !!

« on: July 22, 2017, 06:45:35 PM »

Hi All,

I am new to the forum and I have a question about an unusual application which I hope someone can help me with.

I have a CNC glue dispenser set up so that it dispenses adhesive following a vector with Mach3. The dispenser is activated using M3/M5 and it dispenses glue after the Z plunge and stops dispensing as the Z axis rises.
The problem is that there is a small dwell before X,Y move:

N290G1M3Z-0.100F480.0   <----- Here
N300G1M3Y64.994F6000.0
N310G1X55.873
N320G1Y2.436
N330G1X1.411
N340G00M5Z3.000

As you see, the post processor is set to give M3 at first 'begin FIRST_FEED_MOVE', but by the time the X,Y axis start moving, there is fraction of second delay which means the glue starts to pool before the X,Y axis have started to move.

So, I thought to provide the glue pump activation relay with a signal ONLY if X OR Y are moving AND M3 is active but where to get that signal from? i.e I would need a pin "high" indicating X or Y move and 'low' at any other time so that I could logically AND this to M3 (which outputs at pin 17).

Any ideas appreciated :-)