i do have very slow acceleration. i also found that i could just
move higher than necessary and missed the edge of the hole. it is
without absolute stop that it made the "grinding" noise. it was
not extreme just noticeable and made me think something mechanical
was wrong. i put the G61 and 64 just around the z moves and it
works just fine now, no grinding and no clipped hole edges. i am
not too concerned if this is a bad way of doing it as long as it
works and it is of such limited scope (three little places in the
code) that i doubt there will be complications.
On 4/4/2021 6:32 PM, Andy Wander wrote:
If the
trajectory planner is combining moves that are commanded on
separate lines, that is, making both moves at the same time,
then something is very wrong.
?
It sounds like
Brian suspects that your acceleration is very low, and
therefore the CV mode could cause this to appear to happen.
While it is still on the way up in Z, it begins the next X
or Y move.
?
A quick way to
get rid of the problem would be to command Z to move to a
higher position before you tell the machine to move in X or
Y. That way the roundoff would be in the air rather than in
the part.
?
The grinding
noise you refer to may simply be the way your machine sounds
in exact stop mode. It¡¯s a pretty brutal way of doing
things.
?
?
i sued the G61 and G64 and it does the job? of course
i meant used not sued. definitely was combining moves
and Brian seems to agree that the trajectory planner will do
that and that the absolute stop is the way to fix it and it
did.
On 4/4/2021 6:14 PM, Andy Wander wrote:
If your Mach4
is combining moves on different lines, then it is not
working correctly. There¡¯s no way that a controller should
ever combine 2 separate moves.
?
I haven¡¯t had
that problem, but lately I am having the problem that if I
move my axes during a toolchange, mach4 doesn¡¯t realize
it, and all move from then on are relative to the place I
moved the axes to.
?
?
i sued the G61 and G64 and it does the job. I guess mach3
trajectory planner was different? never had that particular
issue then.
the xbox plugin is great once it is activated :)
i tried to figure out how to best use the various joysticks
and buttons to get what i want and could not figure it out.
maybe there are modifier keys that can be used along with
joysticks but i couldn't figure it out.
ideally i want slow and fast x y and z jogging and some
sort of crude a control just fixed increments would be good
enough. i only use the A in setup so it is not a big deal
but x y and z are
?so what is a reasonable way to configure the xbox to
achieve that basic control?
i'll try that. so there is a trajectory planner in mach4?
i was going to look but forgot to see if there was an
option to not combine separate moves. now that i know how
to get around this i am fine but it was a surprise to see
the cutter clip the corner of a pocket as it climbs out. i
had a z move separate and an x and y i think this is only
a problem with other axis following a z that was intended
to clear obstacles.
how do i get the latest xbox plugin and what is it called
and file dates?
On 4/4/2021 4:02 PM, Steve Stallings
wrote:
Could
you consider putting a G61 (exact stop) ahead of the
G1 F83 Z .2 move and a G64 (exact stop cancel) after
it? This prevents the trajectory planner from blending
the next move with the critical retract move in Z.
?
?
?
From: [email protected] [mailto:[email protected]]
On Behalf Of spencer@...
Sent: Sunday, April 04, 2021 4:42 PM
To: [email protected]
Subject: Re: [MachCNC] odd behavior ESS?
I have been learning a lot about mach4 and am getting
quite comfortable with it. I do not need to add anything
other than my little parts counter and an external
switch.
I would like to get xbox controller working but i just
can't seem to on the router computer, only the house
computer.
here is the odd behavior. i think this is an ESS issue.
in mach3 i has having strange behavior at exactly the
same spot. with mach4 i didn't until suddenly it also
did the same thing. if i don't have the line in bold
shown below (using a short dwell) the z and followiong x
and y moves get combined
G1 F51 Z -1.15
G1 F31 X 1.73
G1 F83 Z .2
G4? P100 (dwell to prevent combined move)
without this line the G1 F83 Z .2 and the next G1 get
combined into one move clipping off
the corner of the part? with the 100 ms dwell it moves
to the z location and then to the X and Y
i checked this over and over and am not imagining it?
also previously this is the exact spot where phantom
moves (and usually corrections that cancelled the
phantom move) happened and have happened twice now with
mach4 so it must be an ESS bug or maybe something odd
about my gcode that i don't understand
G52 X0 Y0 Z0 (cancel all offsets)
(SECOND WARP HOLE)
G52 X-.555 Y .875 Z -1.67
(G1 F61? Z .3 just in case)
G1 F93? X2.1003 Y0.5649
and a larger part of the context here
?
M9 (mist off to release clamp)
G1 F10000 A 90
M7 (mist on to set clamp)
M3 S1000
(DO DSLOT FINISH)
G1 F65? Z 0 (might be able to move a little less to
finish cut might help ejection)
G52 z - 1.67
G0 X 2.1541 Y 2.7725
G1 F93? X 2.1541 Y 2.7725 (was Y 2.71)
G1 F75? Z 0.0
G1 F83 Z -.35
G1 F31 X 1.73
G1 F31 Z -.7
G1 F32 X 2.1541 (this one needs to be slower)
G1 F51 Z -1.15
G1 F31 X 1.73
G1 F83 Z .2
G4? P100 (dwell to prevent combined move)
without this line the G1 F83 Z .2 and the next G1 get
combined into one move clipping off
the corner of the part? with the 100 ms dwell it moves
to the z location and then to the X and Y
i checked this over and over and am not imagining it?
also previously this is the exact spot where phantom
moves (and usually corrections that cancelled the
phantom move) happened and have happened twice now with
mach4 so it must be an ESS bug or maybe something odd
about my gcode that i don't understand
G52 X0 Y0 Z0 (cancel all offsets)
(SECOND WARP HOLE)
G52 X-.555 Y .875 Z -1.67
(G1 F61? Z .3 just in case)
G1 F93? X2.1003 Y0.5649
G1 F51 Z -.14
G2 F93.0 X2.0828 Y0.5696 I0.0 J0.035
G2 Y0.6302 I0.0175 J0.0303
G2 X2.1353 Y0.5999 I0.0175 J-0.0303
G2 X2.1003 Y0.5649 I-0.035 J0.0
G1 F93.0 Y0.5149
G2 F93.0 X2.0578 Y0.5263 I0.0 J0.085
G2 Y0.6735 I0.0425 J0.0736
G2 X2.1853 Y0.5999 I0.0425 J-0.0736
G2 X2.1003 Y0.5149 I-0.085 J0.0
G1 F83 Z .1? (retract)
G52 X0 Y0 Z0 (cancel all offsets)
--
Best regards, Spencer Chase
67550 Bell Springs Rd.
Garberville, CA 95542 Postal service only.
Laytonville, CA 95454 UPS only.
Spencer@...
(425) 791-0309
--
Best regards, Spencer Chase
67550 Bell Springs Rd.
Garberville, CA 95542 Postal service only.
Laytonville, CA 95454 UPS only.
Spencer@...
(425) 791-0309
--
Best regards, Spencer Chase
67550 Bell Springs Rd.
Garberville, CA 95542 Postal service only.
Laytonville, CA 95454 UPS only.
Spencer@...
(425) 791-0309
--
Best regards, Spencer Chase
67550 Bell Springs Rd.
Garberville, CA 95542 Postal service only.
Laytonville, CA 95454 UPS only.
Spencer@...
(425) 791-0309
--
Best regards, Spencer Chase
67550 Bell Springs Rd.
Garberville, CA 95542 Postal service only.
Laytonville, CA 95454 UPS only.
Spencer@...
(425) 791-0309
