Difference between revisions of "Flameman/pcb-laser-exposer"

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For more interesting projects done by Flameman and Legacy, be sure to check out his [[Flameman#master_index|project index]]
 
  
 
= pcb laser exposer =
 
 
 
== project idea ==
 
 
* [http://www.das-labor.org/wiki/LaserExposer avr idea]
 
* [http://www.youtube.com/watch?v=fi4P-Bwc6g8&feature=player_embedded video]
 
 
=== polygon mirror ===
 
 
Its assembly is mounted vertically on the flatbed scanners sled. The flatbed scanner sled is the Vertical axis, and the polygon mirror defelcting the laser in the scanner is the horizonbtal axis. Each Horizontal line is scanned about 150 times before the sled moves on to the next vertical position. The laser is scanned by the mirror continuasly at 55 Revolutions of the mirror per second, or 333 Hz scanrate, as the mirror is hexagon shaped. The exposure pattern is produced by turning the laser on and of synced to the rotation of the mirror.
 
 
 
=== Optics & Optical Issues ===
 
 
The original laser in a laserprinter is infrared, and that wavelength doesn't work for exposing pcbs which need 405nm at least.
 
 
You'd removed the infrared laser, and make a nice alluminium laser mount milling down the mirror assembly to fit it. As the lenses in the polygon mirror assembly had the wrong optical properties for my application, csudr different wavelength and different focussing distance, you'd removed them all.
 
 
The optical system should consists only of the laser, its focussing lens, and the polygon mirror.
 
 
There is one problem with this: as the beam length varies with the angle of the deflected laser beam, the focus of the laser lens would also have to be adjusted for each beam length. As this isn't done, the laser gets blurry at the ends and the middle of the scanline. But this is not a problem in practice, as the image gets sharp enough.
 
 
== how does laser beam work ==
 
 
[[File:pcb-laser-exposer-idea.gif]]
 
 
== beam idea from Panasonic KX P4410 ==
 
 
[[File:pcb-laser-exposer-beam.jpg]]
 
 
 
=== where to buy (proof list) ===
 
 
laser @ 405nm ??
 
 
* Lilly-Electronics on ebay
 
* [http://www.o-like.com/index.php?main_page=product_info&cPath=8&products_id=92&zenid=3f04n3smvhgneu3ckvmhuihsv7 o-like]
 
 
== Canon LBP1210 ==
 
 
=== laser ===
 
 
=== mirror motor ===
 
 
<pre>
 
 
 
            M63154AFP
 
    3-phase Brushless driver
 
          ______________
 
      VCC |1    \__/  36| nc   
 
      RS  |2          35| Limit
 
      FLT |3          34| Vref
 
      B1  |4          33| Vctl
 
      PS  |5        * 32| /Acc  <-----
 
phase.U  |6        * 31| /Dec  <-----
 
pahse.V  |7          30| RCP
 
      Gnd |8          29| Gnd
 
      Gnd |9          28| Gnd
 
      Gnd |10          27| Gnd
 
      Gnd |11          26| Gnd
 
phase.W  |12          25| SGnd
 
      HU+ |13          24| OSCV
 
      HU- |14          23| OSCC
 
      HV+ |15          22| FG- <----- it may be interesting
 
      HV- |16          21| FG+ <----- it may be interesting
 
      HW+ |17          20| Amp.out
 
      HW- |18          19| FGout
 
          |______________|
 
 
 
 
                output current
 
ACC  DEC        VCTL(CPout)      Function
 
------------------------------------------------
 
H(5V) H(5V)        0uA            Hold
 
H(5V) L(0V)      -200uA            Deceleration
 
L(0V) H(5V)      +200uA            Acceleration
 
L(0V) L(0V)        0uA            Hold
 
 
 
 
Cable  Pin    Symbol      Function
 
---------------------------------------------------------------------
 
        1    Vcc          Power supply
 
        2    RS          Current sense
 
        3    FLT          Connect to application of filter
 
        4    B1          Short brake switch
 
        5    PS          Power save signal input
 
        6    U            Motor phase U output
 
        7    V            Motor phase V output
 
      8..11  Gnd          Power Gnd
 
        12    W            Motor phase W output
 
        13    Hu+          Hall sensor signal input (U phase +)
 
        14    Hu-          Hall sensor signal input (U phase -)
 
        15    Hv+          Hall sensor signal input (V phase +)
 
        16    Hv-          Hall sensor signal input (V phase -)
 
        17    Hw+          Hall sensor signal input (W phase +)
 
        18    Hw-          Hall sensor signal input (W phase
 
        19    FGout        FG comparator output
 
        20    Amp.out      FG amp. output
 
        21    FG+          FG signal input (+)
 
        22    FG-          FG signal input (-)
 
        23    OSCC OFF    Timer setup -1
 
        24    OSCV OFF    Timer setup -2
 
        25    SGnd        Gnd
 
      26..29  Gnd          Power Gnd
 
        30    RCP          Charge pump output current setup term.
 
        31    DEC          Deceleration signal input
 
        32    ACC          Acceleration signal input
 
        33    VCTL        Motor speed control voltage input
 
        34    VREF        Reference voltage input
 
        35    LIMIT        Current limit set up terminal
 
        36    N.C.        N.C
 
 
 
 
 
cable    M63154AFP
 
|1 |-  4,5, 8,9,10,11  (gnd)
 
|2 |-  31              (/dec, deceleration input)
 
|3 |-  32              (/acc, acceleration input)
 
|4 |-  1,2              (Vcc)
 
</pre>
 

Latest revision as of 03:24, 10 July 2020