I had inland motors on a Kearney and Trekker mill, Most problems I had with
that machine was the encoders. The ones built in we're quite small and fit
in the motor housing with a small set of gears driving them.I took one
apart once the glass disk was damaged, damaged before I started taking it
On Mon, 11 May 2015, Rick Lair wrote:
Date: Mon, 11 May 2015 10:53:40 -0400
From: Rick Lair r...@superiorroll.com
Reply-To: Enhanced Machine Controller (EMC)
emc-users@lists.sourceforge.net
To: Emc Users emc-users@lists.sourceforge.net
Subject: [Emc-users] Servo Motor Question
On 11 May 2015 at 15:53, Rick Lair r...@superiorroll.com wrote:
Any thoughts/ pointers as to what may be causing this?
It sounds like the PID tuning might be off. Is this
LinuxCNC-controlled or is it a standalone PID?
--
atp
If you can't fix it, you don't own it.
Its Linuxcnc controlled, and has been running fine for over a year, the
operators started noticing a poor finish on the parts just as of recent.
The material is hardened D2 Tool steel, and we are using ceramic and
diamond inserts, so machine issues, even very small and non noticeable
on a
On 5/11/2015 11:02 AM, Peter C. Wallace wrote:
Non linear resolver output points to an overloaded input For a 7I49, I
would check that the maximum resolver output voltage is less than 1V
RMS (you need to rotate the shaft to find the peak on one or measure
both sine and cosine and
] Servo Motor Question
On 5/11/2015 11:02 AM, Peter C. Wallace wrote:
Non linear resolver output points to an overloaded input For a 7I49, I
would check that the maximum resolver output voltage is less than 1V
RMS (you need to rotate the shaft to find the peak on one or measure
both sine
A little off topic, but I figured this would be the best place to ask,
On one of our turning centers using Linuxcnc, the operator was
complaining of a poor finish on the bores of the parts we were making.
After a lengthy investigation, I saw that while the Z axis was in motion
at low speeds (
On 11 May 2015 at 17:05, Rick Lair r...@superiorroll.com wrote:
I thought that the deadband value would only effect the positioning when
the axis was idle, not while in motion?
No, it is the position error required before there is any output from the PID.
Out of interest, how big was the tiny
On 5/11/2015 9:51 AM, Karlsson Wang wrote:
Mechanical problem?
I'd start with the easiest, take the motor, resolver, encoder apart and
clean everything then put it back together. That's also a good time to
look for damaged mechanical parts.
A fault that has been steadily getting worse or
On 11 May 2015 at 17:45, Rick Lair r...@superiorroll.com wrote:
I had 0.1 in the entry.
That is indeed quite small. I think it turns out to be actual inches
unless there is an unusual scaling somewhere.
--
atp
If you can't fix it, you don't own it.
http://www.ifixit.com/Manifesto
I had 0.1 in the entry.
On 5/11/2015 12:43 PM, andy pugh wrote:
On 11 May 2015 at 17:05, Rick Lair r...@superiorroll.com wrote:
I thought that the deadband value would only effect the positioning when
the axis was idle, not while in motion?
No, it is the position error required before
I messed with everything, I even started changing the individual cards
on the servo drive, and didn't notice any favorable changes, some even
brought out other gremlins,
I had a very minute value in the DEADBAND entry in my INI, I zeroed
that, and it went away, go figure.
I thought that the
I have had to tweak the deadband value to get rid of loop instability
due to worn ball screws.
Noise and mechanical slop would cause the loop to hunt badly without
some deadband. Sounds like you had a similar problem.
Dave
On 5/11/2015 12:45 PM, Rick Lair wrote:
I had 0.1 in the entry.
Mechanical problem?
On Mon, 11 May 2015 11:10:52 -0400
Rick Lair r...@superiorroll.com wrote:
Its Linuxcnc controlled, and has been running fine for over a year, the
operators started noticing a poor finish on the parts just as of recent.
The material is hardened D2 Tool steel, and we are
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