THORLABS ELL14, Руководство по эксплуатации

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ELL14 Motorized SM1 Optic Rotator Chapter 5: Troubleshooting and FAQ
Rev. B, Feb 2020 Page 13
Chapter 5 Troubleshooting and FAQ
Frequently Asked Questions
Rotator not moving
Check power supply lines ratings (polarity, voltage drop or range, available current) or reduce cable length.
Check module is not in boot loader mode (power cycle the module to exit boot loader). Current consumption must be higher
than 36 mA at 5 V.
Rotator does not complete homing commands
Power cycle the unit.
Perform a frequency search on both motors.
Rotator switching time increased / max load decreased
Check power supply voltage provided on J1 connector, increase voltage within specified limits if voltage drop along cable goes
below 5 V during system operation.
Clean the moving surfaces. To avoid grease contamination, do not touch the moving parts.
Temperature change may affect the rotator performance. Using the software to perform a frequency search will compensate as
needed (required current could reach 1.2 A during frequency search, use an additional 5 V 1 A power supply and a USB
connection).
Integrators should search for optimal frequency on every power up sequence (commands “s1”, “s2” see ELLx protocol
document).
How do I restore the factory (default) settings
Factory settings can be restored during the startup (calibration) test – see Section 4.5.
Motor optimization does not work.
The optimization may fail if the device is damaged, if the load is heavily unbalanced or changed in position during the
optimization, or if the power supply is not stable.
Note
Do not run more than one device optimization at the same time on the same bus and power supply.
The current drawn can overload the power supply. Allow 20 minutes of cool down between consecutive optimizations
on the same device.
If the optimization fails, the device will try to reload the previous settings. If this reload fails, perform a frequency search (see
section 4.3) to reload the settings.
The unit is not responding after power up
During the power up sequence, if the user holds down the JOG, BW and FW lines to ground, the module will go into a boot
loader (firmware update) mode.
Power cycle the unit again without pressing the 3 buttons at the same time to exit from the boot loader mode.