Dan
Thanks. Yes I did isolate logic and power cablesit looks much neater but
did not seem to make any
difference to the results
- Original Message -
From: Organic Engines [EMAIL PROTECTED]
To: emc-users@lists.sourceforge.net
Subject: Re: [Emc-users] Micro stepper driver MSD542
Hi Aaron,
I've recently been messing about with microstepping drivers trying to
get precise rotation and some speed out of a little lathe head. I found
that microstepping gave me all sorts of problems and that, at 1/8 steps
- the limit of the drive I had, the highest possible speed was much
Hi agian
If anyone can bear to listen to my woes
I am still having problems configuring my stepper machine. As someone
suggested, the problem seems to be with the rapid moves. I
have got one good result with Velocity @ 20mm acceleration @ 10 with micro
stepping set @ 16 with the motors wired
I'm not really experienced with steppers at all, most all of my knowledge is
just from reading, and not actual experience, but if I were faced with your
problem, I would try reducing the microstepping in your drives and see how
well that works for you. to me it seems like yo might be at the limit
Aaron,
Micro stepping works better at slow speeds. In my Gecko 203v drive it morphs
from
10 microsteps to none as the rpm goes up. I'm guessing your just trying to go
to fast
for your hardware. If a G0 move goes bad then your max velocity is set to high.
If
you lose steps or stall the motor
Organic Engines wrote:
Aaron,
One other thought. If your drives are in that plywood box with the
smoked plexiglass cover they could be overheating.
I had a test rig that was on plywood and it would act weird because it
was overheating. All the problems went away when I installed it
Aaron,
If you are using feed override at any percentage, it can sometimes
affect your rapids, it. the rapid speed is also overridden, exceeding
the machine's capabilities.
Run some handwritten g code tests.
g0 x10 f1
g0 x0 f1
g0 x10 f2
g0 x0 f2
I use inches, so adjust your
Aaron,
One other thought. If your drives are in that plywood box with the
smoked plexiglass cover they could be overheating.
I had a test rig that was on plywood and it would act weird because it
was overheating. All the problems went away when I installed it in a
metal box with an
] Micro stepper driver MSD542 / KL-5042 cont.
Date: Wed, 21 May 2008 17:38:54 -0600
They came out fine. I see your using a center pull on the Y, novel
idea. Keep in your
mind that the Y motor sees a substantial load compared to the X as
it it carrying the
weight and drag of both
Hi Aaron,
In your control box, your step and direction have to be kept well away
from all your drive power and motor cables.
Ghost step and direction signals can be INDUCED in your step and
direction lines if the motor or drive power cables run parallel to them.
I would try to run
I think I would like to clear a few miss understandings here. I am not an
engineer and will never be one. I am a furniture maker/designer with a keen
interest in
digital technologies and linux. I have built a 1.5m x 1.5m gantry style router
table with high spec rails, carriages and
Aaron,
Other responders have indicated they needed more infomation.
If you can fill in the blanks and confirm or correct assumptions then
someone has a real chance of providing
concrete help. It won't be me as I'm a servo person. Sorry.
OK, lets gather some more information here:
Stated or
Hi Aaron,
Do you have some pictures of your system on the net for us to look at?
A shot of the Machine and one of the control in particular?
Dan
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(EMC) emc-users@lists.sourceforge.net
Subject: [Emc-users] Micro stepper driver MSD542 / KL-5042 cont
Date: Wed, 21 May 2008 13:26:15 -0700
Aaron,
Other responders have indicated they needed more infomation.
If you can fill in the blanks and confirm or correct assumptions
then someone
Dan
Not sure where i could upload pictures to
Aaron
- Original Message -
From: Organic Engines [EMAIL PROTECTED]
To: emc-users@lists.sourceforge.net
Subject: Re: [Emc-users] Micro stepper driver MSD542 / KL-5042 cont.
Date: Wed, 21 May 2008 16:35:01 -0400
Hi Aaron,
Do you
Controller (EMC) emc-users@lists.sourceforge.net
Subject: [Emc-users] Micro stepper driver MSD542 / KL-5042 cont
Date: Wed, 21 May 2008 13:26:15 -0700
Aaron,
Other responders have indicated they needed more infomation.
If you can fill in the blanks and confirm or correct assumptions
Kenneth Lerman wrote:
One of the problems with a gantry style machine is that unless you are
careful, the gantry will skew with respect to the other axis. Skewing
can cause uneven motion and/or distorted motion. There are a variety of
ways to prevent that.
Ken brings up a good point,
Machine Controller (EMC) emc-users@lists.sourceforge.net
Subject: Re: [Emc-users] Micro stepper driver MSD542 / KL-5042 cont
Date: Wed, 21 May 2008 16:56:59 -0400
It appears from previous posts, that the gantry is about 1.5 meters long
and rides on rails. What is the support/bearing mechanism
When I built my stepper powered plasma cutter I did some basic tests to see if
I was
loosing steps. I mounted a dial indicator and jogged to a known point on the
dial
then did some G0 moves out and about then back to the known point. If I didn't
return to the exact spot or as good as the
I really think we need some pictures and/or details.
Instead of using letters for a test case, could you try using short
lines? First plot a set of parallel lines about 5 cm long and 2 cm
apart, parallel to the X axis and centered on the Y axis. Then do the
same thing parallel to the Y axis
aaron Moore wrote:
I think I would like to clear a few miss understandings here. I am
not an engineer and will never be one. I am a furniture maker/designer
with a keen interest in digital technologies and linux. I have built
a 1.5m x 1.5m gantry style router table with high spec rails,
Thanks for you interest everyone.
I have tried to post images here
http://s297.photobucket.com/albums/mm226/Skinnybottom/
Cheers
Aaron
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Hi Aaron,
Flickr, Photobucket Myspace. Heh.
Dan
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They came out fine. I see your using a center pull on the Y, novel idea. Keep
in your
mind that the Y motor sees a substantial load compared to the X as it it
carrying the
weight and drag of both.
Do you know the timing settings you used in Mach?
John
On 21 May 2008 at 21:43, aaron Moore
Kenneth Lerman wrote:
I really think we need some pictures and/or details.
Instead of using letters for a test case, could you try using short
lines? First plot a set of parallel lines about 5 cm long and 2 cm
apart, parallel to the X axis and centered on the Y axis. Then do the
same
John Kasunich wrote:
It sounds like you are losing position during rapid moves only. The
move between letters is probably a G0 rapid, which goes as fast as EMC
thinks the machine can go, while the moves within the letters are G1
lines or G2/G3 arcs, both at some specified feedrate.
A
Actually am having similar problems with mach but not as pronounced
Aaron
- Original Message -
From: John Thornton [EMAIL PROTECTED]
To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net
Subject: Re: [Emc-users] Micro stepper driver MSD542 / KL-5042 cont.
Date: Wed, 21
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