Homebrew PCBs

12 years ago I tested a HP IIIp, and found 0.005" skew error across a 7X10 test pattern done on an 8.5 X 11 transparency. I also tested a 4, and 5 laser jet and found it to be greated than 0.050" skew error.  As far as ink jet, I ran an old HP550, and it was somewhere around 0.050" skew as well. I have no idea of the printers of today, but accuracy is not a concern of the printer people, as it really doesn't matter. Even for single sided, its not an issue, but for small vias,the error's require great attention to detail especially page orinetation, to try and make them line up on a large pcb

Thanks
Ron
  ----- Original Message ----- 
  From: Dave Mucha 
  To: Homebrew_PCBs@yahoogroups.com 
  Sent: Monday, July 14, 2003 11:13 PM
  Subject: [Homebrew_PCBs] Re: Help with etching - accuracy


  Interesting idea.

  but what is the overall accuracy ?

  it would seem that a PCB could be off more than just a few thou over 
  the lenght of a 10 inch board and still be very accuracte for 
  locating chips and stuff.

  Has anyone done realworld tests ?

  I would assume that inkjet and laser and copiers would not be perfect 
  as the US treasury has dictated that such machine cannot be exact 1:1 
  ratios. goes to preventing the average Joe from making their own $$$$

  DAve




  --- In Homebrew_PCBs@yahoogroups.com, "TT Scale Model Railroads" 
  <ttsmr@y...> wrote:
  > I need to have a few 8x10 inch pcbs etched.
  > 
  > These are not for electronic applications but a calibration test 
  > tool.  They will have a rectangle out lined with measurment marks 
  on 
  > all 4 sides.
  > 
  > I have the art work but need to find someone who can etch them for 
  me.
  > 
  > Would anyone be available to make several etchings for me and at 
  what 
  > cost?
  > 
  > Please feel free to email me at:
  > 
  > ttsmr@y...
  > 
  > Thanks,
  > 
  > DOn


        Yahoo! Groups Sponsor 
              ADVERTISEMENT
             
       
       

  Be sure to visit the group home and check for new Bookmarks and files:
  http://groups.yahoo.com/group/Homebrew_PCBs

  To unsubscribe from this group, send an email to:
  Homebrew_PCBs-unsubscribe@yahoogroups.com



  Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. 


[Non-text portions of this message have been removed]