X8 Limiting Axis windup

[Bill Henderson]

I have a swarfing cut making multiple passes.

 

I am using the Generic HAAS 5X which has been modified for axis label output. (thanks Colin)

 

The initial axis rotates between -45 and -90 degrees while the (A) axis turns completely in circles..

 

X-.0176 Y-2.4001 Z1.8735 A-2154.67 B-89.868

X-.0121 Y-2.4009 Z1.8726 A-2156.32 B-89.927

X-.0065 Y-2.4015 Z1.8725 A-2157.97 B-89.969

X-.001 Y-2.4018 Z1.8733 A-2159.619 B-89.987

 

After several passes the A is wound up to 2159 degrees.

 

Is there a way to limit this?

 

I have tried here....

#Set pri_limtyp and sec_limtyp on following conditions

#0 = Less than 180 degrees

#1 = Equal or greater than 180 degrees and less than 360 degrees

#2 = Soft limit at 0-360 degrees with hard limits slightly beyond

     #Set limhi-limlo to hard limits, inthi-intlo to 360 degrees total

     #limhi-limlo are expected equal amount from inthi-intlo

#3 = Greater than 360 degrees

auto_set_lim : 1     #Set the type from the angle limit settings (ignore these)

pri_limtyp$  : 0

sec_limtyp$  : 0

 

#Rotary axis travel limits, always in terms of normal angle output

#Set the absolute angles for axis travel on primary

pri_limlo$   : -9999 <<<<<<<<<<<<<<< HERE

pri_limhi$   : 9999

#Set intermediate angle, in limits, for post to reposition machine

pri_intlo$   : -9999

pri_inthi$   : 9999

 

#Set the absolute angles for axis travel on secondary

sec_limlo$   : -9999 <<<<<<<<<<<<< HERE

sec_limhi$   : 9999

#Set intermediate angle, in limits, for post to reposition machine

sec_intlo$   : -9999

sec_inthi$   : 9999

 

But that posts an error

 

Could it be somewhere in here? vvvvvv

 

#Tolerance settings for wind up

p_tol_ang    : 210   #Primary angle move to exceed for direction change

s_tol_ang    : 210   #Secondary angle move to exceed for direction change

d_tol_ang    : 210   #Dummy angle move to exceed for direction change

 

#pri_limtyp = 1, tolerance to validate tripping limit

#                reset the p_frc_adj_sec flag when back to normal range

#pri_limtyp = 2, angle move >= to trigger reposition on primary and

# angle move >= with rev5 or 180 reposition to validate tripping limit

p_rsoft_tol  : 45

 

#sec_limtyp = 2, Angle move >= for reposition 

s_soft_tol   : 270

 

adj_lim_trp  : 90    #Angle move in p_pri_rot180 to trip reposition

 

#pri_limtyp = 3 and sec_limtyp = 3 control values

p_rsoft_tol3 : 90    #Angle move >= with rev5 or 180 reposition

 

Any input would be greatly appreciated.

 

Thank you.

 

[Guest]

Have you tried -360 and + 360

[Bill Henderson]

ha ha. John that would make TOO much sense.

 

Thanks John. That's it.

 

What was I not thinking?

[Guest]

ha ha. John that would make TOO much sense.

 

Thanks John. That's it.

 

What was I not thinking?

 

Brain farts...they come with age  

[Colin Gilchrist]

NOOOOOOO!

 

Lol. Ok, sorry. Had to get that out.

 

You don't want to limit the Wind Up that way. Depending on how you've got the post setup, that would actually cause the swarf tool path to hit the rotary limit, and then do an "unwind move", where the Z axis retracts, and the A Axis unwinds back to within the travel limits before restarting.

 

You need to use these variables:

pang_output  : 0     #Angle output options, primary
sang_output  : 0     #Angle output options, secondary
                     #0 = Normal angle output
                     #1 = Signed absolute output, 0 - 360
                     #2 = Implied shortest direction absolute output, 0 - 360

Try setting 'pang_output' to '2'. That would let the A axis "wrap" over from +360 to "0", without changing the ability of the Rotary to "wind up" without forcing a retraction...

[Bill Henderson]

Thanks Colin I will try that. I didn't set wind up limits btw. I did however have to set Mi 8 to 4. 

 

It was set to 1 and at the end of the swarf single pass (cutting Y- side of trunnion) it would retract to Z7 reposition X correctly but turn Y to positive Z rapid into trunnion and then make the correct Y- move to position of start of cut.

 

Scared the crap out of the operator.