Page 2 of 3 FirstFirst 123 LastLast
Results 11 to 20 of 26

Thread: ....S

  1. #11
    Join Date
    Jan 2007
    Location
    Florida
    Posts
    4,382

    Default

    Well Sh*t Took me all day to build that mount.. Oh well, theres always a few more days somewhere...

    -edit- or I may have to do something bizarre.. its happened b4...

  2. #12
    Join Date
    Feb 2007
    Location
    Herts, UK
    Posts
    1,254

    Default

    The other thing Steve-o is those GS's don't need heatsinking, you can use much easier-to-work-with materials to make a mount.

  3. #13
    Join Date
    Jan 2007
    Location
    Florida
    Posts
    4,382

    Default

    That's good to know--I should have asked y'all first

  4. #14
    Join Date
    Jan 2007
    Location
    Florida
    Posts
    4,382

    Default

    Ok, since ive loosened the 'grub-screws', how do I tell their original position-- I suppose Ive really fucked 'em up now -- hopefully not--
    -meh-- I'm an idiot.. sometimes..

  5. #15
    Join Date
    Jan 2007
    Location
    Florida
    Posts
    4,382

    Default

    Thanks for the advice, you-all so far, but I need a little more pleez ..
    I locked the shaft down with the set screw as instructed, installed a mount to the little shaft and;
    I hooked one of the galvos to 10VDC just to get an Idea of the deflection angle and (1) It got very hot very quickly
    and
    (2) when I reversed polarity the angle was significantly less than the other polarity. I thought these were suppose to run + 18 VAC out of the amplifiers.
    (which I dont have yet; but they are on their way)
    Thanx,
    Steve

  6. #16
    Join Date
    Jan 2007
    Location
    Florida
    Posts
    4,382

    Default

    MixedGas just sent me a PM on how to re-align them so nevermind..
    Still wondering why they get hot.. Is 10V too high?

  7. #17
    mixedgas's Avatar
    mixedgas is offline Creaky Old Award Winning Bastard Technologist
    Infinitus Excellentia Ion Laser Dominatus
    Join Date
    May 2007
    Location
    A lab with some dripping water on the floor.
    Posts
    9,890

    Default

    open loop amplifer schematic
    pay attention to those resistors at the output end, they create a signal which is used for damping, ie the difference signal between the inductive load and the resistive load is the damping feedback signal.


    www.gs-scanners.com/pdfs/manuals/A102_AX200.pdf

    G124 DATA SHEET

    http://www.gs-scanners.com/pdfs/data..._736-49506.pdf

    Steve

  8. #18
    Join Date
    Oct 2006
    Location
    Central Florida
    Posts
    7,067

    Exclamation

    Quote Originally Posted by Displaser View Post
    Steve,

    I don't think there's a choice here - you'll need a pair of mirror mounts for the 124's, homebrew or otherwise. If you're looking for a source, LSDI in Orlando may still have these for sale (nice folks & great support!).

    www.lsdi.com

    Greg
    Steve, call these people. I just got off the phone with a very nice lady who seems to have all kinds of knowledge about these. They made a custom amp for them 10 years or so ago that will drive these to almost g120 speeds she said. She doesn't know what they have "left" but they may have something you can use. I plan on stopping by there at some point soon. They're only 10 or 15 minutes from my work.

    O, I think it is +5/-5v that makes em move, the 18+/- is for the amps... I think.

  9. #19
    Join Date
    Feb 2007
    Location
    Herts, UK
    Posts
    1,254

    Default

    Quote Originally Posted by steve-o View Post
    (1) It got very hot very quickly
    Ouch! they will do if you apply 10v DC...
    Think of them as a speaker. If you apply DC to a speaker it will overheat and burn out sooner or later. Best to connect them up to an amplified/adjustable low frequency sine wave signal if you want to test them.


    Quote Originally Posted by steve-o View Post
    (2) when I reversed polarity the angle was significantly less than the other polarity
    Sounds like the torsion bar wasn't centred before locking the grub screw up, not a biggie.

  10. #20
    Join Date
    Jan 2007
    Location
    Florida
    Posts
    4,382

    Default

    There. Done and done. (I hope) Push on mirror mounts, a piece of aluminum..
    Thank Y'all for getting me on the right track
    I post scanning pix soon.

    Special thanks to Steve R (MixedGas) for the galvos, amps-(coming soon) and all the info.
    Attached Thumbnails Attached Thumbnails gs mount.JPG  

    Last edited by steve-o; 11-19-2007 at 12:41.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •