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lasershark 2.1 no galvo movement

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jpilarski:
Could I have bricked it somehow. How can I test if it's outputting values to the galvos.

Macpod:
It certainly sounds like the analog interface of the LaserShark has been damaged. This is based on  your statements that the program continues to run until you stop it and the fact the showcard still can drive the galvos.

Do you have a multimeter? First thing I would do is verify that the analog power is working (this is the black box on the board. If you look under the board you will see there is a set of two pins and a set of three pins.
Test 1: Probe the series of two pins and report the voltage. It should be about 5v.

Test 2: Probe the center of the three pins in series (gnd) and one of the adjacent external pins. Repeat for the other pin These should read -12 and 12v.

 

jpilarski:
I tried to run the test and I got close to 5 volts sometimes. Sometimes I got a reading and other times nothing. I couldn't get the 12 volt to show much at all. I was testing from middle pin (ground) to left pin and then to right pin with the same settings on my voltmeter. I couldn't get it to show up as 12 ever. Hope I had it set correctly.

Macpod:
The first two set of pins should read 5V all the time (or something close). What you are measuring here is the 5v from your computer. If this value is too low (4.5v and below) then the analog power supply will stop functioning properly.

How do you have the LaserShark connected to your computer? Is it connected directly or through a hub? If a hub, is the hub powered? (The hub should be powered)


Try plugging the LaserShark directly into your computer (preferrably a port in the back) and test again. If it is still not operating properly, try probing the pins again. If the readings vary significantly you can try pressing a little harder. Over time an oxidation layer can form atop pads

jpilarski:
Ok the first 2 pins are reading 5 volts or 4.97 and it is consistent. I will try it on a different computer tomorrow. I am only getting a very small amount of voltage on the other 3 pins. I can feel the mirror vibrate on the circlemaker program but it is so weak and hardly moving. When the laser is projecting it just shows up as a point. When I run the showcard it plays the graphics as expected.

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