On 20 June 2010 02:56, Tom Easterday tom-...@bgp.nu wrote:
Very interesting. I have been fighting with a following error that I get
for no apparent reason. I thought for a while that my ways were sticking or
something.
If this is a stepper config, without encoders, then the chances of
there
Date: Mon, 12 Oct 2009 09:40:02 -0600
From: s...@highlab.com
To: emc-developers@lists.sourceforge.net
Subject: Re: [Emc-developers] hostmot2 stepping folowing error oddity
Chris Morley wrote:
I'm having a little problem with a hostmot2 stepper setup.
I get following errors that I
On Jun 19, 2010, at 5:48 PM, Chris Morley wrote:
Date: Mon, 12 Oct 2009 09:40:02 -0600
From: s...@highlab.com
To: emc-developers@lists.sourceforge.net
Subject: Re: [Emc-developers] hostmot2 stepping folowing error oddity
Chris Morley wrote:
I'm having a little problem
Very interesting. I have been fighting with a following error that I get for
no apparent reason. I thought for a while that my ways were sticking or
something. For me it happens mostly on my X axis but sometimes on my Z as
well. It is sporadic and when it errors, I have to try turning on
On Sat, 6 Feb 2010, Jeff Epler wrote:
Date: Sat, 6 Feb 2010 18:18:51 -0600
From: Jeff Epler jep...@unpythonic.net
Reply-To: EMC developers emc-developers@lists.sourceforge.net
To: EMC developers emc-developers@lists.sourceforge.net
Subject: Re: [Emc-developers] hostmot2 stepping folowing
@lists.sourceforge.net
Subject: Re: [Emc-developers] hostmot2 stepping folowing error oddity
On Sun, 18 Oct 2009, Sebastian Kuzminsky wrote:
Date: Sun, 18 Oct 2009 20:47:32 -0600
From: Sebastian Kuzminsky s...@highlab.com
Reply-To: EMC developers emc-developers@lists.sourceforge.net
To: EMC
-developers] hostmot2 stepping folowing error oddity
Sebastian Kuzminsky wrote:
So... If the human asks for (for example) 1 microsecond
StepLen+StepSpace, and the driver thinks the stepgen clock runs at
33,000,000 ticks/second, then it's going to ask for 33 ticks. But if
the stepgen clock
Chris Morley wrote:
I switched to the .8 max velocity. It still errors.
It is still magnitudes worse in the negative direction.
I didn't have time to make scope screenshots nor
test very much. I can tomorrow if you would like.
I'm seeing something fishy here too, with ferrors when the
Sebastian Kuzminsky wrote:
So... If the human asks for (for example) 1 microsecond
StepLen+StepSpace, and the driver thinks the stepgen clock runs at
33,000,000 ticks/second, then it's going to ask for 33 ticks. But if
the stepgen clock in reality runs at 30 MHz, then those 33 ticks will
stepping folowing error oddity
Sebastian Kuzminsky wrote:
So... If the human asks for (for example) 1 microsecond
StepLen+StepSpace, and the driver thinks the stepgen clock runs at
33,000,000 ticks/second, then it's going to ask for 33 ticks. But if
the stepgen clock in reality runs at 30 MHz
On Tue, Oct 13, 2009 at 04:21:00AM +, Chris Morley wrote:
No I can jog in negative direction stop before it errors and jog again
(meaning there will be no direction change) and it will error. It is
always worse in the neg. direction.
I think the assumption that there will be no
On Tue, Oct 13, 2009 at 06:48:09AM -0500, Chris Radek wrote:
I think the assumption that there will be no direction change in this
case is not right. I have noticed that the software stepgen will
prefer direction set one way while idle and it will always do that.
I think the Mesa stepgen is a
stepping folowing error oddity
Peter C. Wallace wrote:
On Mon, 12 Oct 2009, Chris Morley wrote:
I'm having a little problem with a hostmot2 stepper setup.
I get following errors that I can't track down a reason for.
Is it possible you simple dont have enough hardware headroom to reach you max
Date: Tue, 13 Oct 2009 08:06:00 -0700
From: p...@mesanet.com
To: emc-developers@lists.sourceforge.net
Subject: Re: [Emc-developers] hostmot2 stepping folowing error oddity
On Tue, 13 Oct 2009, Sebastian Kuzminsky wrote:
Date: Tue, 13 Oct 2009 08:57:34 -0600
From: Sebastian
Peter C. Wallace wrote:
At the lowest (hardware) level, the stepgen will not run faster than
1/(StepLen+StepSpace) regardless of whats programmed in the velocity register.
one level above that the HostMot2 driver will not use a velocity greater than
.maxvel. If ..maxvel is set to 0
Chris Morley wrote:
I'm having a little problem with a hostmot2 stepper setup.
I get following errors that I can't track down a reason for.
Interestingly while watching the following error on halmeter
I can see that the error is way worse in the negative direction
then the positve direction.
Strange! Are you on the master branch? There were some bad hm2 stepgen
ferror problems in early 2.3 releases. The latest official 2.3 release
and the current trunk/master branch have all the fixes.
Yes I am using master. I have last pulled as of yesterday.
from dmesg
hm2 driver
On Mon, 12 Oct 2009, Chris Morley wrote:
Date: Mon, 12 Oct 2009 01:53:06 +
From: Chris Morley chrisinnana...@hotmail.com
Reply-To: EMC developers emc-developers@lists.sourceforge.net
To: EMC DEV emc-developers@lists.sourceforge.net
Subject: [Emc-developers] hostmot2 stepping folowing
Is it possible you simple dont have enough hardware headroom to reach you max
velocity? With 200 usec StepLen and 200 uSec StepSpace, the maximum step rate
the hardware can generate is = ~2500 Hz, I just glanced at the ini file but
doesn't a Scale of 2800 mean 2800 steps per inch? If
On Tue, Oct 13, 2009 at 03:59:05AM +, Chris Morley wrote:
yes 2800 steps per inch.
I don't doubt your math. You would think it should error all the time.
but running in the negative direction is definitely worse then positive.
I bet it has to wait for a direction change, so it starts out
yes 2800 steps per inch.
I don't doubt your math. You would think it should error all the time.
but running in the negative direction is definitely worse then positive.
I bet it has to wait for a direction change, so it starts out
further behind.
No I can jog in negative direction
I wouldn't think that should make a difference.
and why would jogging (at say 25 ipm) be worse then G0 moves at
100 ipm
How is jogging planning different from G0 moves ?
Acceleration is higher. Program G61 to get full acceleration on a
G0 move.
But why would the cruise phase on a
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