connecting PCI-6035E and SCB-68 and control a laser to turn on/off

[dnchari]

I have connected SCB-68 to a 15pin cable and connected to a laser. From computer I have connected PCI-6035E board to SCB-68 to control a Laser to turn on and off from a LabVIEW program. I have connected PIN#, 6,7, 14 from SCB-68 to 15pin connecter cable, and I connected PCI-6035E board to SCB-68. My program is not turning on the laser.

[AnalogKid2DigitalMan]

We need more information regarding the laser- can you attach the manual for it? What conditions need to be set for it to lase? Based off the pin numbers provided, it looks like you have connected PFI5, DGND, and +5V to the laser assumming a 1:1 wiring scheme.

Also post your vi.

-AK2DM

[dnchari]

In SCB-68, I have connected pin#22 DAC0OUT to turn on Laser, i.e. pin#6 of 15-pin connector

[AnalogKid2DigitalMan]

I've connected pin 9 of my SCB-68 to pin 1 on my laser. Doesn't tell you too much, does it? 🙂

-AK2DM

[dnchari]

Thank you for the reply, I am using DAC0OUT and AOGND only two pins from SCB-68.

[dnchari]

Here is the laser manual

[AnalogKid2DigitalMan]

dnchari:

Thanks for the manual. Youll need to set up the jumpers for external modulation and laser enable as shown in section II of the manual.

On you 15 pin connector you will need to wire pin 4 to pin 5. This will enable the laser. Later, once you can verify modulation, maybe we can use the DAQ card to control the on/off.

You made mention of DACOUT0 and AOGND, these look like the signals you need to connect- DACOUT0 wired to pin 8 (EXT MOD) and AOGND to pin 7 (GND).

NOTE: Looks like 0V into the laser is no power, 1.350V into it is full power, so do not exceed 1.350V when commanding the analog output voltage.

Hopefully this should get you started. Wear the proper wavelength laser safety goggles.

-AK2DM

[dnchari]

The jumpers are all already set, coz I have taken the laser from another setup which is already there. I have connected pin4and pin5 together and connected DAC0 OUT to pin 8(EXT MOD) and AOGND to pin 7(GND), but the laser is not turning on.

I have checked the same VI that I am using with another setup(different SCB board), its working fine.

Thanks for your help

[AnalogKid2DigitalMan · Accepted solution]

Try:

1. Checking for tight cable connections of the cable at both the DAQ card and the SCB-68.

2. If I remember correctly, there are switches inside the SCB-86 box that set up the configuration based on your DAQ card and your requirements. Make sure those are set correctly.

3. If you have a meter, verify that your DAQ card is outputting the proper voltage at the SCB-68 terminals.

4. Post the vi you are using.

-AK2DM

[dnchari]

I could figure out the problem, the pins mentioned in Laser manual is not matching, the manual is for new lasers. This laser is lil bit old. I checked voltages for each pins and figured out the right ones. They are actually pin# 13(Orange in 15-pin cable)(GND) and 15(Green in 15-pin cable)(DAC0 OUT).

Thanks a lot for taking the time to help me out.