Laser scanner problem (distortion).[VIDEO]

[juampix]

Hey guys, i have a little big problem with my laser, and i have a phenix 45kkps scanner, 1 mirror got broken and i changed only the other one and i think that's the cause of this:


but in the first days the laser worked perfectly, i don't know why now do that, i think the galvo motors are broke, what do you think?

[db3306]

Looks like you have a grounding problem, i had a similar issue a while ago and i noticed that a cable was squashed and touching the case.
Try to measure the resistance between the signal cables and your case.


(this is what a broken galvo sounds like i guess, https://dl.dropbox.com/u/22501533/IMG_4463.MOV )

[juampix]

what ? do you thing a cable without aislation is touching the case?... mmm, i will see, but i think it's the scanner, so, i will be buying a DT30 in a few days, to laserwinkel, but i will see, lets see if i can fix that shitty problem, and it's only problem with 1 motor, the other one works fine

[juampix]

im testing right now(my cat too lol) and started to make the problem again, like 1:30 mins running fine it starts to make those things, i think it's the galvo because i added a mirror a bit different size than the original, i think 1mm difference, i think changing the scanner will fix it? and when i got the other scanner i will take this off and i will make another laser with a laser diode that i have there haha, 50mw green , thanks for the help, but i think changing the scanner will solve the problem quickly

[db3306]

Not saying it is your cable, but could be, or maybe a bad connection somewhere down the line to that driver board.
Your problem looks quite similar to the one i had a while ago, check this video..




Since you changed the mirror, i guess you would need re-tuning that one, can you project an ilda testpattern?

[juampix]

no, my problem is not like that, my problem not is like that video, that looks like interference, my laser start going wrong and not do any line well xD, i will project and ilda test pattern in a few mins wait i have to put the ilda on the laser and those things :P

[juampix]

the ilda pattern run perfect but 1 minute later it starts to do the same than the other things xD, i recorded it, 5 mins and it's on youtube

[juampix]

there's a photo of the test pattern 5 seconds after i cut the video. the video is uploading right now

[db3306]

my bet is that you have to retune the driver since you changed the mirror

[juampix]

wait a minute i'm uploading the video. and you will see that all looks OK but a few minutes later the laser turn like the photo