Machsupport Forum

G-Code, CAD, and CAM => G-Code, CAD, and CAM discussions => Topic started by: mgilbert754 on July 27, 2012, 05:05:35 PM

Title: G code strategy
Post by: mgilbert754 on July 27, 2012, 05:05:35 PM

Hi guys- can anyone help this newbie?

I have built a 5 axis machine- it is for dispensing 2 chemicals into hundreds of little vials. I use the x-y-z commands to position my dispensing tips to the top of each vial.

Now is the tricky part.

I have 2 pumps controlled by stepper motors for the "A" and "B" axis. I tell them to rotate 6 revolutions to dispense the correct amount of liquid.

Now here is the trouble- I have to keep incrementing the pumps by 6 with every dispense. Does anybody know any way to "resent" the "A" or "B" axis references back to zero each time? That way it will dispense correctly and I don't have to add "6" to each event (it's hundreds of lines long.)

Any help would be greatly appreciated!

Mark

Title: Re: G code strategy
Post by: Overloaded on July 27, 2012, 05:55:29 PM

Use G91 Incremental Mode for the pump motors.
or ...
Could run the pumps in a macro...
 G91 A-B dispense, then back to G90 for the x-y-z moves.
Just a thought,
Russ

Title: Re: G code strategy
Post by: BR549 on July 27, 2012, 07:11:07 PM

YEP just run the dispense function in INC mode.

(;-) TP

Title: Re: G code strategy
Post by: mgilbert754 on July 28, 2012, 03:04:19 PM

AWESOME- this works GREAT! THANK YOU VERY MUCH!!