G95 spindle speed problem on a 2006 GR 510. Trying to do something weird.

Brent Burns · Oct 21, 2019

I'm trying to use G95 Feed Per Rev to keep the spindle aligned with the center of a 30" diameter arc.

Code:

N140 G0 G90 G54 X75. Y28.
N150 G43 H1 Z7.
M19 R90.0
N160 Z5.
N170 G3 X60. Y43. I-15. J0. S1 M3 G95 F94.2478
N180 X45. Y28. I0. J-15.
N190 X60. Y13. I15. J0.
N200 X75. Y28. I0. J15.
N210 G0 Z7.

The machine alarms out with 186 Spindle Not Turning at anything below S10.

S10 alarms out with something like Max Feedrate Exceeded as the actual feed would be 942ipm at that speed.

Sometimes the spindle starts turning slowly, other times it just sits there as it feeds through the first arc section. In MDI with M3 S1 it will turn at 2rpm per the screen.

Is the Vector drive not capable of this?

Hoss710 · Oct 21, 2019

you're feed rate is to high . your telling it to go 94. inches in 1 rev.

thesidetalker · Oct 21, 2019

No, not capable on Haas to use mill spindle as "c-axis"

G95 wont sync the spindle to movement like a rigid tap cycle

It might be possible to "simulate" that with a nice macro and really small moves, however I think you'll run the risk of the spindle eventually turning the long way around to next increment. It wont necessarily continue to orient the same way. (and sometimes spinning multiple times) Plus you can only increment by .1°

Trying to use a drag knife or something?

G00 G90 X0 Y0
(spindle offset) #1= 0
M19 R#1
#2= 15. (radius)
#3=0 (angle)
G00 X#2
WHILE [ #3 LE 360. ] DO1
G01 X [ #2 * COS[ #1+#3 ] ] Y [ #2 * SIN[ #1+#3 ] ] F10. M19 R[#1+#3]
#3= #3 + 0.1
END1

thesidetalker · Oct 21, 2019

Actually I guess you can do 2 decimals with M19 R

Brent Burns · Oct 22, 2019

thesidetalker said:
It might be possible to "simulate" that with a nice macro and really small moves, however I think you'll run the risk of the spindle eventually turning the long way around to next increment. It wont necessarily continue to orient the same way. (and sometimes spinning multiple times) Plus you can only increment by .1°

If I have time today, I'm going to at least test a bunch of small degree changes with M19 and see how it acts.

Your code is elegant. Really hope I get to play with it today. My macro-fu is rusty but I think your example is complete.

thesidetalker said:
Trying to use a drag knife or something?

Yup. A multi bladed knife to produce parallel grooves for a sealing surface.

If this doesn't work, we'll likely end up building some sort of fixturing similar to a co-ax indicator to do this op.

Thank you very much!

Brent Burns · Oct 22, 2019

So I played with M19 with R values in 1deg increments as well as a full circle at 45deg increments. Also confirmed that it would feed directly after M19 without the spindle being on. Spindle was locked at the orientation degree it was given. Spindle orients in the same direction each time. Didn't think to try negative values for R to see if it would reverse.

This is progress.

Will update when I'm able to work with it more.

Brent Burns · Oct 28, 2019

Code:

%
O00775 
G103 P1 
(M19 TEST) 
(CODE FROM PRACTICAL MACHINIST) 
G20 
G00 G17 G40 G49 G80 G90 
T9 M06 
G187 P2 
G00 G90 G54 X90. Y28. 
G43 H09 Z7. 
(SPINDLE OFFSET) #1= 0 
M19 R#1 
Z5. 
#2= 15. (RADIUS) 
#3= 0 (ANGLE) 
(G00 X#2) 
WHILE [ #3 LE 360. ] DO1 
G01 X [ 75. + [ #2 * COS[ #1 + #3 ] ] ] Y [ 28. - [ #2 * SIN[ #1 + #3 ] ] ] F100. 
G01 Z5.1 
M19 R [ #1 + #3 ] 
G01 Z5. 
#3= #3 + 5.0 
END1 
G00 Z7. 
M05 
G91 G28 Z0. 
G28 X0. Y0. 
M30 
%

With a few modifications, I got sidestalker's code running.

As predicted, the spindle started doing full orients. This occurred around 330deg. To account for this; I have it raising up .100 after the X/Y move, doing the orient, and then back down.

G103 P1 was used to make the macro page make sense.

Incremented the angle by 5deg for speed while testing.

Flipped the sign on the Y move to make it move in a clockwise direction. The spindle didn't like negative angle moves and this keeps the spindle aligned with the arc.

I'm confident enough in this to build a knife and test further.

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G95 spindle speed problem on a 2006 GR 510. Trying to do something weird.

Brent Burns

Plastic

Hoss710

Cast Iron

thesidetalker

Stainless

thesidetalker

Stainless

Brent Burns

Plastic

Brent Burns

Plastic

Brent Burns

Plastic