Collimator and slide control
Last updated: Thu, 27 February 2003
moller@jlab.org
One can remotely control the position of 2 elements using stepping motors:
- Collimator at the dipole enterance consists of 2 lead
(or some other heavy material) bricks in each arm. The distance
between the bricks is adjustable in a range of about 2-40mm.
The collimators in both arms are moved at the same time,
leaving a horizontal slit.
- Slide is a movable platform positioned between the dipole
and the detector box. It is used to test detectors. The detectors can
be attached to this platform.
Both the collimator and the slide can be moved remotely using stepping
motors controller "VELMEX-NF90". Full list of controller commands is
here (PDF file)
Collimator
On a "dumb terminal" (or a port-server)
- telnet hatsv12 2002 - connect to the controller
- type username "adaq" and password for "adaq"
- E - enable (use CAPITAL!!)
- C - clear the program in memory (the acceleration settings will not be changed and motor speeds will default to the last set speed)
- A1M2 <Return> - set up the acceleration value to 2 (2000step/sec**2) for motor #1
- S1M20 <Return> - set up the speed value to 20steps/sec for motor #1
- I1MXXX <Return> - set the number of steps (XXX) to move for motor #1(+ for opening, - for closing).
There are 10000 steps for the full range 2-40mm.
- R - start moving (Result: ^ - finished, O^ - reached an end-switch).
- V - show status (Result: R -ready for command, B - busy).
- K - kill operation (Result: ^ -interrupted programm and killed any motion)
- Q - quit
Slide
On a "dumb terminal" (or a port-server)
- telnet hatsv12 2003 - connect to the controller
- type username "adaq" and password for "adaq"
- E - enable (use CAPITAL!!)
- C - clear the program in memory (the acceleration settings will not be changed and motor speeds will default to the last set speed)
- A1M5 <Return> - set up the acceleration value to 5 (5000steps/sec**2) for motor #1
- S1M1000 <Return> - set up the speed value to 1000steps/sec(default value) for motor #1
- I1MXXX <Return> - set the number of steps (XXX) to move (+ away from the motor, - toward the motor, the motor is normally at the left side looking downstream).
There are 633.3 steps/mm.
- R - start moving (Result: ^ - finished, O^ - reached an end-switch).
- V - show status (Result: R -ready for command, B - busy).
- K - kill operation (Result: ^ -interrupted programm and killed any motion)
- Q - quit
Rebooting port server
On a "dumb terminal" (or a port-server)
- telnet hatsv12 - connect to the port server as root
- type username "root" and password for "root" ("dbps" default)
- boot action=reset
- wait few seconds while port server is rebooting.