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| d2:laser_controller [2020/05/04 19:03] – Michael Radunsky | d2:laser_controller [2020/09/11 23:19] – Michael Radunsky |
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| <WRAP center round tip 80%> | <WRAP center round tip 80%> |
| If the LED indicator does not turn on when the Laser ON-OFF/Reset switch is flipped up, make sure both interlocks are engaged and that the COARSE CURRENT knob is turned up at least half a turn. If the current is set to 0 mA when you engage the Laser ON switch, the system detects an open circuit (no current flowing) and indicates an error. Due to the "soft start" circuitry employed in the current source, you may safely leave the current at its operating setpoint when engaging and disengaging the Laser ON switch. | If the LED indicator does not turn on when the Laser ON-OFF/Reset switch is flipped up, make sure both interlocks are engaged and that the COARSE CURRENT knob is turned up at least half a turn. If the current is set to 0 mA when you engage the Laser ON switch, the system detects an open circuit (no current flowing) and indicates an error. Due to the "soft start" circuitry employed in the current source, you may safely leave the current at its operating setpoint when engaging and disengaging the Laser ON switch. The soft start limits the ramp time of the current to the set point to >300 ms. |
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| If the LED indicator turns on for ~5 seconds and then turns off, check your laser diode connection to see if it is open (or if the diode is backwards). | If the LED indicator turns on for ~5 seconds and then turns off, check your laser diode connection to see if it is open (or if the diode is backwards). |
| **Laser Temp Output (8-pin connector)** | **Laser Temp Output (8-pin connector)** |
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| An 8-pin Hirose connector (see <tabref TECconnectortable> for identity of connectors) carries the signals for the temperature control of the Laser module. The wiring diagrams are shown in the table below, where 1 (2) refer to stage 1 (2) temperature control, which stabilizes the Laser Housing (Laser Diode). Rth and Rth_Rtn are the two ends of a 10 kΩ [[http://www.analogtechnologies.com/ath10kr8.html|Analog Technologies ATH10KR8 Thermistor]]. | An 8-pin Hirose connector (see <tabref TECconnectortable> for identity of connectors) carries the signals for the temperature control of the Laser module. The wiring diagrams are shown in <tabref TEC_connector_pinout> below, where 1 (2) refer to stage 1 (2) temperature control, which stabilizes the Laser Housing (Laser Diode). Rth and Rth_Rtn are the two ends of a 10 kΩ [[http://www.analogtechnologies.com/ath10kr8.html|Analog Technologies ATH10KR8 Thermistor]]. |
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| <WRAP round center box 230px><tabcaption TEC_connector_pinout| TEC connector pin out> | <WRAP round center box 230px><tabcaption TEC_connector_pinout| TEC connector pin out> |
