G90 G1A-10 would rotate ccw all the way back from where it is to -10
All the way meaning more than one rotation?
Regards,
Alex
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2009/10/2 Alex Joni alex.j...@robcon.ro:
G90 G1A-10 would rotate ccw all the way back from where it is to -10
All the way meaning more than one rotation?
I think it rather has to. I am thinking in terms of acting the same
way as a linear axis.
Imagine milling a 2-start, 2-turn worm, you would
On Thu, 1 Oct 2009 15:53:02 -0500, you wrote:
exactly 1 full turn requires using g91
more than one full turn requires using g91
Argghhh... N G
One flavour of Fanuc only (15b)! Why follow a bad design?
Fanuc, as is their habit, changed it. Sensibly later Fanuc controllers
treat rotary
On Thu, 1 Oct 2009 13:56:32 -0500, you wrote:
Gentlemen,
on the Fanuc 15mb control:
exactly 1 full turn requires using g91
more than one full turn requires using g91
Not one of Fanuc's better ideas and since changed :)
Steve Blackmore
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On Thu, 01 Oct 2009 12:32:48 -0400, you wrote:
And what I think I'm seeing is quantization noise in the time domain, the
occasionally very narrow spike probably isn't there on your o-scope. But it
(to me anyway) points to a problem in that the sampling is probably not being
done in the base
2009/10/2 Steve Blackmore st...@pilotltd.net:
On page 6 I changed the sampling rate to base thread.
http://filebin.ca/wacbfm/screenshots.pdf
Aha! I see noisy encoder signals. That seems to be confusing the
velocity calculation (but possibly not the position calculation)
I am also a little
2009/10/2 Andy Pugh a...@andypugh.fsnet.co.uk:
Aha! I see noisy encoder signals.
To see if that is the problem, you could debounce the signals in HAL.
None of the glitches looks to be longer than one sample, so a single
sample debounce should do. The drawback is that you potentially lose
Chris,
Is your PROGRAM_PREFIX setting in the [DISPLAY] section set?
Regards, Jan
On Thu, Oct 1, 2009 at 12:54, Chris Epicier seuch...@yahoo.de wrote:
Hi all
I am in the process of cutting parts, due out soon. Should be doing million
things, other than keepin my cnc busy.
I checked and
On Fri, 2009-10-02 at 12:10 +0100, Andy Pugh wrote:
2009/10/2 Alex Joni alex.j...@robcon.ro:
G90 G1A-10 would rotate ccw all the way back from where it is to -10
All the way meaning more than one rotation?
I think it rather has to. I am thinking in terms of acting the same
way as a
On Fri, Oct 02, 2009 at 12:18:50PM +0100, Steve Blackmore wrote:
One occurrence that is interesting - when the rotation in the same
direction reaches 360.0 (a full circle), it continues to increase. It
does not become zero degrees again.
I think your book is describing the same behavior EMC
Hi guys,
I'm using a cutter cadius compensation with gcode G41 and I follow the Material
Edge Contour simply letting EMC to work and adjusting the trajectory based on
my absolute coordinates. The trajectory I can see is only that of the backplot
calculated (the tool path starting in the center
On Fri, Oct 02, 2009 at 12:37:05PM +0100, Steve Blackmore wrote:
On page 6 I changed the sampling rate to base thread.
http://filebin.ca/wacbfm/screenshots.pdf
Excellent, page 7 shows the problem very clearly. You have really
awful spindle feedback. I'm surprised this works at all.
You
On Fri, 02 Oct 2009 12:37 +0100, Steve Blackmore st...@pilotltd.net
wrote:
I've redone that at 100 rpm, and out of interest looked at the pulses
out for the Z axis, the position interpolation is linear, as shown in
halscope, the pulses out are anything but! Surely they should be linear
On Fri, Oct 02, 2009 at 03:31:51PM +0200, 5150 wrote:
Hi guys,
I'm using a cutter cadius compensation with gcode G41 and I follow the
Material Edge Contour simply letting EMC to work and adjusting the trajectory
based on my absolute coordinates. The trajectory I can see is only that of
the
Gentlemen,
I can think of one scenario that the rotary (0-359.999) configuration will
handle better than the linear (0 thru unlimited) configuration.
On a 180 degree move you would give a command of B180 or B-180 (the same
position). If the sign does not tell the machine which way to turn then
On Thu, Oct 01, 2009 at 03:53:02PM -0500, Chris Radek wrote:
G53 still does the full unwind.
Not anymore - now it uses the sign to determine which way to turn,
and goes to the specified coordinate in that direction while
disregarding g5x and g92 offsets.
Andy Pugh wrote:
2009/10/2 Steve Blackmore st...@pilotltd.net:
On page 6 I changed the sampling rate to base thread.
http://filebin.ca/wacbfm/screenshots.pdf
Aha! I see noisy encoder signals. That seems to be confusing the
velocity calculation (but possibly not the position
Jon Elson wrote:
OK, things look worse, and obvious noise is showing in the A and B
traces when you do this.
I think it shows that the sampling was being done at the faster rate
before.
OOps, I misread what you had changed. Chris said it right. This is
allowing you to see what is actually
Steve Blackmore wrote:
I've redone that at 100 rpm, and out of interest looked at the pulses
out for the Z axis, the position interpolation is linear, as shown in
halscope, the pulses out are anything but! Surely they should be linear
too?
There are several screenshots so I bundled them
Chris Epicier wrote:
Hi all
I am in the process of cutting parts, due out soon. Should be doing million
things, other than keepin my cnc busy.
I checked and rechecked the syntax in bot, master, labels and other files. I
cannot find a mistake there.
Is there a way I can debug this? A way to
On Friday 02 October 2009, Steve Blackmore wrote:
On Thu, 01 Oct 2009 12:32:48 -0400, you wrote:
And what I think I'm seeing is quantization noise in the time domain, the
occasionally very narrow spike probably isn't there on your o-scope. But
it (to me anyway) points to a problem in that the
Stuart
Think about it. The linear will always be predictable. It moves
from the current position to new position. In linear absolute mode -180
is not the same as 180. If I were at between -180 and 180 for a move to
180 it would move CW, a move to -180 it would move CCW . If the
On Fri, 2 Oct 2009 08:25:32 -0500, you wrote:
On Fri, Oct 02, 2009 at 12:18:50PM +0100, Steve Blackmore wrote:
One occurrence that is interesting - when the rotation in the same
direction reaches 360.0 (a full circle), it continues to increase. It
does not become zero degrees again.
I
On Fri, 02 Oct 2009 11:34:45 -0500, you wrote:
. I would think a 1 K Ohm
resistor from +5 V to the A and B would make a big difference. You can
get +5 V from the game port or a
hard drive plug. Yup, also looking closer, I see COORDINATED spikes in
both A and B on a number of
cycles. That
On page 6 I changed the sampling rate to base thread.
good, the first 5 pages are in respect to phase-a b irrelevant.
Looking at page 6 however, AB look really bad, try running them through a
debounce first.
That might increase chances of success.
http://filebin.ca/wacbfm/screenshots.pdf
On Fri, 2 Oct 2009 09:29:05 -0500, you wrote:
Gentlemen,
I can think of one scenario that the rotary (0-359.999) configuration will
handle better than the linear (0 thru unlimited) configuration.
On a 180 degree move you would give a command of B180 or B-180 (the same
position). If the sign
On Friday 02 October 2009, Andy Pugh wrote:
2009/10/2 Steve Blackmore st...@pilotltd.net:
On page 6 I changed the sampling rate to base thread.
http://filebin.ca/wacbfm/screenshots.pdf
Aha! I see noisy encoder signals. That seems to be confusing the
velocity calculation (but possibly not the
On Fri, Oct 02, 2009 at 04:05:54PM +0100, Steve Blackmore wrote:
Ehh?
Ehh?
It's sane for any rotary, particularly those that CAN rotate forever.
OK, matter of opinion. Let me explain and justify my opinion further
down. Simply restating it is silly.
Also as Andy pointed out, you can do
As a spur gear tooth cutter one needs 0-360, but a helical gear cutter
goes above 360, a worm maker may need up to 10 turns, a thread miller
may want a lot more.
For a hobbing machine many hundreds or thousands of turns but
returning to the real homed 0 or arbitary angle in less than one turn
is
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