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Author Topic: Weird rotary axis issue???????????????  (Read 8529 times)

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Offline Tarak

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Re: Weird rotary axis issue???????????????
« Reply #30 on: April 30, 2016, 11:03:44 PM »
Thanks dude1 and rcaffin for your help.
I changed the step frequency in the smooth stepper settings as per the recommended:
X axis: 128 kHz
Z axis: 32 Khz
A axis 64 Khz

I then went into the motor tuning settings and set to the max velocity and then set my acceleration, they seem smoother and a bit faster, so I'll happy with that.
I also tested my original program again using v040 (I know I shouldn't bother, and just try to figure out the feed hold issue for v062, I'm just curious).
BTW, with v062, if I'm running a basic program I press feed hold, it displays PAUSE then pauses a second or two later, the small delay is fine, but with a more involved program (coincidence maybe???) I press the space bar and nothing, it doesn't even display pause, no matter how many times I press it, I would love to figure out this pausing issue, it would solve all of my problems......I'm pretty sure my wife would disagree though! :P

Oh I also forgot to ask, if I change the kernal speed to 25 kHz, will I need to re-tune the motors?

This below program works...
;Annular plunge grinding example with finishing cycle
#1=48
#2=47.5
#3=6
#4=2
#5=24
#6=0
#7=4
#8=-1874919423
#9=0
#10=0.1
#11=0.025
#12=12000
#13=3500
#14=0.475
#15=5
#21=10
#23=0
#24=0
#25=1
#28=3
#16=1.5
#17=0.5
#18=[[#6/[#5+#3]]*#3]
#20=3
#22=-1.1520495086364e-006
#26=[360/#7]
#27=[#22*#4]
#29=5
G90 G21 G57
G18
M208
G90 G0 Z0.
G4 P2
G0 X[#2+#11+#17+#21]
A0
M98 P1 L#20
G90 G0 Z0.
A0.
G0 X[#2+#11+#21+0.3]
M98 P4 L#29
G90 G0 X[#2+#11+#17+#21]
M208
Z0. A0
G0 X[#1+#21]
G4 P1
M18
M16
M30
O1
G91 G0 X[#21-[#21*2]]
M98 P2 L#15
G91 G1 A720 F#12
G1 X[#17+#21] F300 ;IF I USE G0, IT WOULD JOLT X AXIS OUT AND TRIP THE SERVO
G0 X[[#18-[#18*2]]*#4] Z[[#3*#4]-[[#3*#4]*2]] A[[#22-[#22*2]]*#4]
M99
O2
G91 G1 X[#10-[#10*2]] A360 F#12
M98 P3 L1
M99
O3
M99
O4
G91 G0 X[#21-[#21*2]]
M98 P5 L1
G0 X#21;THIS LINE SHOULD ALSO TRIP OUT THE SERVO, BUT DOESN'T????
G0 X[#18-[#18*2]] Z[[#3*#25]-[[#3*#25]*2]] A[#22-[#22*2]]
M99
O5
G91 G1 X[[#11-[#11*2]]-.3] A360 F#13
M98 P6 L#28
G91 G1 X[#9+0.3] A#26 F#13
G91 G0 X#11
M99
O6
G91 G1 A360. F#13
M99
« Last Edit: April 30, 2016, 11:06:13 PM by Tarak »
Re: Weird rotary axis issue???????????????
« Reply #31 on: April 30, 2016, 11:40:25 PM »
If you change the kernal speed you are advised to revisit the motor tuning.
Cheers
Roger

Offline dude1

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Re: Weird rotary axis issue???????????????
« Reply #32 on: May 01, 2016, 12:48:58 AM »
+1 to rodger if it works better at 25 it's a over flow, one suggestion was to use a delay before the contuse A move so everything is at that point in time
Re: Weird rotary axis issue???????????????
« Reply #33 on: May 01, 2016, 02:16:31 AM »
And Warp9 recommend 25 kHz with the ESS anyhow. No need for anything faster.

Cheers
Roger (without the 'd')

Offline dude1

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Re: Weird rotary axis issue???????????????
« Reply #34 on: May 01, 2016, 02:58:39 AM »
auto correct sux's
Re: Weird rotary axis issue???????????????
« Reply #35 on: May 01, 2016, 03:19:28 AM »
Snerk  :)
Re: Weird rotary axis issue???????????????
« Reply #36 on: May 06, 2016, 05:50:03 PM »
If youa re still having the issue with the X movement error after an A axis move.  I have experienced an issue a few years ago while trying to do 3D rotary machining.  My A axis was tuned alot faster then my other 3.  This caused the X axis to stall and or freak out as soon as the A axis stopped its rotation and the X axis was asked to move.

Re: Weird rotary axis issue???????????????
« Reply #37 on: May 06, 2016, 06:04:19 PM »
Oh really?
Details, please, including Mach version number.

Sigh - not another bug??? But if it is, then it might be possible to find a 'fix'.

Cheers
Roger
Re: Weird rotary axis issue???????????????
« Reply #38 on: May 06, 2016, 06:12:52 PM »
This was years ago.  I do not recall the version number.  I had a sherline rotary which had 800 steps per.  I had the motor tuning ALOT faster then the others.  There was no need to have it tuned that fast as it was only stepping a very small amount.  my best uneducated guess was the amount of resources it took to process the velocity of the A, When X moved it freaked.  Sounds alot like the OP`s description.

Offline dude1

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Re: Weird rotary axis issue???????????????
« Reply #39 on: May 06, 2016, 06:17:35 PM »
you need to have the speeds between A and the other Axis set so they move at the same speed, this means the A Axis has to go faster than X, Y or Z, but when in practice if you set the A axis at the same speed the A will be slower you just need to bring up the speed of the A axis so it looks correct on my machine it's 1250 mm/min for X, Y and Z and A is 2200 mm/min and it runs very well it was a lot of slow cutting to get it correct it's just play to it looks good.

but if you get the A axis going to fast it will make thing go wrong fast there is a fine line between bonkers and all good