Author Topic: Bidirectional offset  (Read 941 times)

Stonemull

  • Hero Member
  • *****
  • Posts: 951
    • View Profile
Bidirectional offset
« on: April 30, 2017, 03:45:35 AM »
Hey Zaks, I was looking at etching some smallish lettering and noticed that if you view bidirectional gcode it has an offset on alternate lines.
Is that deliberate or is there a way to adjust this offset or turn it off ?

Attached a unidirectional and bidirectional version of the same thing.
« Last Edit: April 30, 2017, 03:46:42 AM by Stonemull »
A3 Eleksmaker 2500mW
Solidoodle V2 Pro
Wanhao I3+ touch
Hacked Roland DXY-880
CNC3018 engraver
CNC Plasma (work in progress)

Zax

  • T2Laser
  • Global Moderator
  • Hero Member
  • *****
  • Posts: 7280
    • View Profile
    • T2Laser
Re: Bidirectional offset
« Reply #1 on: April 30, 2017, 04:34:19 AM »
Do you have Photo Mode enabled?

That should not be set, it will be automatically selected by my algorithm when needed. It is designed to eliminate moire patterns in an image caused by scaling. It "pixel shifts" by one unit to break up the patterns and soften the appearance of the image, this is a common visual effect used in TV/Movies to prevent vertical lines.

Obviously for solid text or black/white that would not apply.

Stonemull

  • Hero Member
  • *****
  • Posts: 951
    • View Profile
Re: Bidirectional offset
« Reply #2 on: April 30, 2017, 06:30:48 AM »
Ah, is that what photo mode does, I tried it when I did the doggie etch and probably turned it off when I changed to unidirectional mode. I thought it might have been a setting somewhere just had no clue where, 'bidirectional' does not appear in the manual anyywhere.

I think I need to reread the entire manual, only just found out about the right click on the home button. Sorry for wasting your time.


FYI: I have too many plugpacks and was trying to burn their device name into the side, doesnt work well and stinks.
A3 Eleksmaker 2500mW
Solidoodle V2 Pro
Wanhao I3+ touch
Hacked Roland DXY-880
CNC3018 engraver
CNC Plasma (work in progress)

Zax

  • T2Laser
  • Global Moderator
  • Hero Member
  • *****
  • Posts: 7280
    • View Profile
    • T2Laser
Re: Bidirectional offset
« Reply #3 on: April 30, 2017, 08:28:43 AM »
Actually it is in the manual, but support is never a waste of my time.

Image Options
o   Bi-Directional Scanning (default)
o       Horizontal scan mode follows a serpentine pattern
o       Disabling will scan left to right only

Photo Mode
o       Uses a pixel shifting algorithm (similar to anti-aliasing) to blend the grey levels for a more natural look.
o       Produces a "softer" image (not recommended for clip art)
o       This algorithm will be used if a suitable image is detected and does not normally need to be manually selected