A long long time ago, I posted a message about an SLA250 on which the
laser would power up without a command during idle time. The laser
was not fully powered, but the fans came on, the lights on the side
lit up, as if it were in the cool down cycle.
After a lot of unfruitful part swapping (power supply, controller, and
I/O card) the laser was finally brought under control by installing a
switch in series with the wires connecting the laser to the
For normal operation, the switch is closed. During idle time, the
switch is open. As long as the switch was open, the laser did not
power up on its own.
This morning, after completing a job, the laser had powered off but
switch was still open. I did some file maintenance on the PC followed
with a re-boot, and the laser power came on. This indicates that the
problem still exists, albeit now under control.
I've given up on finding out why the laser behaves this way, but
perhaps if anyone else has this problem they can benefit from my
Hughes Space and Communications
Los Angeles, Calif.
For more information about the rp-ml, see http://ltk.hut.fi/rp-ml/
This archive was generated by hypermail 2.1.2 : Tue Jun 05 2001 - 22:45:34 EEST