Ray Henry wrote:
It could also be me reading it wrong. I had an issue trying to home
using a shared limit pin. The one axis I was homing was fine but all
the others would fault. No way around it after the ignore limit code
was made single axis.
If the limit switches are shared, then the
Hi Chris
I guess I missed it also. Saw the later post where there was a suggested work
around since this is a Mesa card setup. It would be possible to add a normally
closed real relay contact between the limit prox and the drive's directional
inhibit input that, when pulled by the homing
On Tue, Jun 12, 2007 at 05:51:37PM +0100, Richard Arthur wrote:
I have a problem with f-error being larger than normal when homing.
...
Am I correct in thinking the larger than nomal f-error is caused by the
servo amp being disabled by the the limit switch during the homing sequence?
Yes
Ray,
I don't think it's a matter of development thinking.
If he hits teh limit switch and that physically disables his drives then
it's not soemtihng you can overcome by software,
or maybe am I reading it all wrong?
Regards,
Alex
Wah. We really need to get some sort of order in our
It could also be me reading it wrong. I had an issue trying to home
using a shared limit pin. The one axis I was homing was fine but all
the others would fault. No way around it after the ignore limit code
was made single axis.
Long ago we found that motion stuttered during homing. Some sort
Wah. We really need to get some sort of order in our development
thinking here. Sure professional machines use three switches at one end
of travel and two at the other but that does not obviate the need for
lesser systems for us little light machine guys.
The fact that some folk would like to
On Wed, Jun 13, 2007 at 08:48:43AM -0500, Ray Henry wrote:
It could also be me reading it wrong. I had an issue trying to home
using a shared limit pin. The one axis I was homing was fine but all
the others would fault. No way around it after the ignore limit code
was made single axis.
- Original Message -
From: Chris Radek [EMAIL PROTECTED]
To: Enhanced Machine Controller (EMC)
emc-users@lists.sourceforge.net
Sent: Wednesday, June 13, 2007 8:07 AM
Subject: Re: [Emc-users] Homing and f-error
You have to arrange not to do that. A separate home switch seems like
I have a problem with f-error being larger than normal when homing.
I ran this program :
%
G00 G40 G49 G80
G90 G54 G20 G61
G00 X0.2
G01 X0.1 F6.
X0.2
X0.1
X0.2
X0.1
X0.2
M02
%
and took a screenshot of HAL Oscilloscope to demonstrate normal f-error:
http://imagebin.org/8953
This next screenshot
