Hello,
I’m new to motor stepper and I’d like to ask some
questions.
I’ve read the motor record and I’m not sure I
can get what the HOMR, HOMF, JOGR, JOGF means. What are they used for?
I thought HOMR/HOMF has some relation with LLM/HLM
respectively. Is that right? If is, what’s the relation? What about
JOGF/JOGR?
In the motor record documentation, it says ‘these
fields can be set to 1, but setting either field to 0 results in an
error’. What kind of error it may cause? I found that in the IOC
initialization, no values are set to these field, that means the default value
0 is used. And then when the HOMR or HOMF is clicked(motorx_all.adl), such
error occurs:
Filename=”../devOmsCom.cc”
line number=404
Overriding invalid velocity;
slew<=base.
Even if the HOMF and HOMR are set to 1, the same error
occurs. Thus I thought this error is not caused by the settings of HOMF and
HOMR. I thought it was caused by the velocity is too slow even smaller than the
base velocity. But I don’t know how to solve it. The motor and motion
related fields are set as follows in my situation.
MRES=0.18 UREV=360
SREV=2000
VELO=20
S=0.0555556 VBAS=2
The MD125 microstep drive is used and the step rate is 10. I’d
like to know how to solve this problem.
The above error will not affect the running of the motor.
But when the JOGF/JOGR is used, a fatal error occurred.
FATAL: unrecoverable exception
without a task context.
The error displayed on MEDM is:
Channel Access Exception:
Channel Name: Unavailable
Native Type: Unavailable
Native Count: 0
Access: Unavailable
Message: Virtual Circuit
unresponsive
Context: 192.168.2.105:5064
Requested Type: TYPENOTCONN
Requested Count: 0
Source File: ../tcpiiu.cpp
Line Number: 921
The JOGF and JOGR are not set in initialization. The default
value 0 are used. Even changed after initialization, the same error still
occurs.
I will evaluate the performance of the stepper motor. When
doing this, I want to keep the motor moving all the time for several months. Is
there anyone who did the similar thing before? I can’t find any reference
to continuous motion. The files I was given had very little in the way of
documentation. The http://www.aps.anl.gov/xfd/SoftDist/swBCDA/recMotor.html
used to be the developer documentation. But I can’t find it now.
Is there anyone know? Thanks.
Huijuan