Handwheel accuracy

[PhilCote]

Hi,
We installed a handwheel and 2 rotary knobs to control a 3 axis milling machine (see picture). The first knob is used to determine the step of each click of the handwheel (1x, 10x, 100x) and the second one is used to determine wich one of the axis has to move (X,Y,Z,A). The only way I found to control the step of each click is by changing the ACCEL, DECEL and RAPIDSPEED parameters. Here's the code placed in ~@~INPUTIO.FIL for moving the X axis:

IF #63=1 THENIF #64=1 THEN ACCEL 1;10 : DECEL 1;10 :RAPIDSPEED 1000: HANDWHEEL 1;4000;OK2STOP1 '1x

IF #63=1 THENIF #65=1 THEN ACCEL 1;100 : DECEL 1;100 :RAPIDSPEED 5000: HANDWHEEL 1;400;OK2STOP1 '10x

IF #63=1 THENIF #66=1 THEN ACCEL 1;1000 : DECEL 1;1000 :RAPIDSPEED 10000: HANDWHEEL 1;100;OK2STOP1 '100x

IF #63=1 THENIF #67=1 THEN ACCEL 1;1000000 : DECEL 1;1000000 :RAPIDSPEED 120000 :HANDWHEEL 1;400;TACH 'Dyn

And here is my jog button macro:
Code placed in ~@~INPUTIO.FIL is:
IF #34=1 THENIF #62=1 THEN [Jog Buttons X+]

Code placed in ~@~MACRO.FIL is:
[[Jog Buttons X+]]
WAITUNTIL STOP
HANDWHEEL 0
IF#34=1 THEN FEEDRATE 180 :ACCEL 1;120000 : DECEL 1;120000: POSITION 1;9999: WAITUNTIL #34=0
IF#34=0 THEN STOP 1:EXIT

[[Jog Buttons X-]]
WAITUNTIL STOP
HANDWHEEL 0
IF#35=1 THEN FEEDRATE 180 :ACCEL 1;120000 : DECEL 1;120000: POSITION 1;-9999: WAITUNTIL #35=0
IF#35=0 THEN STOP 1:EXIT


I have 3 major problems using these commands:

1- Each click of handle doesn't move the machine of the same step (see graph). So how can I set the handwheel so one click moves the axis of exactly one increment (0.0001", 0.001" and 0.01") depending on the knob position?

2- Each click through the negative direction moves the axis of about twice the distance it moves through the positive direction (see the graph). How can I set the handwheel so each click in any direction moves the axis of the same distance?

3- Using the handwheel seems to desactivates the jog buttons. Any ideas where that could come from?


Thanks a lot in advance!

[camsoft]

PhilCote,

It is solely the 2nd parameter that controls the increment.

The ACCEL and RAPIDSPEED controls the acceleration and speed of the handwheel.

The difference you have entered into the 2nd parameter using 400 and 100 is the cause of the different distances.

Unless you code otherwise, the default system only permits jogging an axis with either the keyboard or handwheel one at a time.

Tech Support
CamSoft Corp.
951-674-8100
support@camsoftcorp.com

[PhilCote]

Thanks for your answer,
However one of my problems remains: when I spin the handwheel CCW (negative), the travel of any axis is still twice the positive travel.

How can I modify my code or how do I have to set the hardware to get the same increment on positive and negative motion?

[Karl_T]

Wierd. Don't see how that's happening.

Just a suggestion. Try low level stuff to break the problem in two. There are Galil card commands to do handwheel directly you might investigate to see if the trouble comes straight from Galil or from Camsoft.

I've never looked at these commands, but I bought a machine with Camsoft where the programmer preferred Galil. Here's a macro that has worked for the last six years:

[[HANDWHEEL]]
LOADING \97
IF\97>2THENEXIT
IF\830=6THENIF#46=1THENIF\220=1THENEXIT
IF\830=7THENIF#46=1THENIF\220=2THENEXIT
IF\830=6THENIF#46=0THENIF\220=3THENEXIT
IF\830=7THENIF#46=0THENIF\220=4THENEXIT
MESSAGE \830
COMMAND GA DX,DX
'TIMER ON;2000
\86=t
IF\830=6THENIF#46=1THENCOMMAND GR 25.41,0:\220=1:MESSAGE HW1:EXIT
IF\830=7THENIF#46=1THENCOMMAND GR 2.541,0:\220=2:MESSAGE HW2:EXIT
IF\86<10THENIF\830=6THENIF#46=0THENCOMMAND GR 0,12.705:\220=3:MESSAGE HW3:EXIT
IF\86<10THENIF\830=7THENIF#46=0THENCOMMAND GR 0,1.2705:\220=4:MESSAGE HW4:EXIT
IF\86>10THENIF\830=6THENIF#46=0THENCOMMAND GR 0,-12.705:\220=3:MESSAGE HW3:EXIT
IF\86>10THENIF\830=7THENIF#46=0THENCOMMAND GR 0,-1.2705:\220=4:MESSAGE HW4:EXIT
[[HANDWHEELOFF]]
COMMAND GR 0,0
\220=0
'TIMER OFF