Model label: GalvoScanAssby
Assembly instructions
Overview:
Y1 - Mirror with 30 degree stroke. This is the first mirror in the path of the laser. This moves in the same direction as the resonant scanner.
Y2 - Mirror with 40 degree stroke. This is the second mirror in the path of the laser.
X - This is the third, smaller galvo mirror.
Build alignment jig. Glue pentaprism on alignment rig
1) Slide in 30 deg stroke (written on back) and 40 deg stroke (written on back) and 3rd galvo into mounting block. Push galvos all the way into mount.
2) Attach first mirror to galvo. Remove the shafts the galvos come on for shipping. Push mirror all the way along shaft.
3) Couple a test laser beam into the pentaprism, level and parallel to whole pattern on table horizontally. Use target card with target in position of pentaprism. Adjust position of whole apparatus such that the back reflection goes along the same vertical plane.
4) Hook up Y1 first, on power up make sure no faults - LED turns green. Note that X cable / Y cables have different endings. Make sure to put mirrors on before turning galvos on.
5) Set Y 1 output voltage to 1.5V - which is approximately 6 V on the input.
6) Rotate angle of Y 1 mirror such that the reflected beam is coming of at an 8° angle.
7) Did fine adjustment of voltage offset to hit 8°, see voltage is 1.511 V
8) Mount the other Y 2 mirror, adjust position so beam perpendicular coming out -4.8mV
9) adjust X angle so comes out level, 0.6 mV
Recommended torques for galvo mirrors and galvos
14 mm x mirror .05” screw socket, 2 inch-pounds torque
20 mm x mirror 1/16” screw socket, 3.8 inch-pounds torque
y mirrors 140 inch-pounds torque
x mirror 110 inch-pounds torque