TinyG hookup for touch off plate?

Home Forums TinyG TinyG Support TinyG hookup for touch off plate?

Tagged: 

Viewing 6 posts - 1 through 6 (of 6 total)
  • Author
    Posts
  • #7185
    mristau
    Member

    Can someone point me to instructions on how to connect a touch off plate to TinyG? Thanks!

    #7189
    cmcgrath5035
    Moderator

    I am not familiar with what a “touch off plate” is.
    Can you provide a brief description or URL to such?

    #7190
    mristau
    Member
    #7191
    cmcgrath5035
    Moderator

    Ah so, of course.

    Have you read thru any of the G38 command discussions, particularly on Chilipeppr, where an auto-leveler has been implemented?

    Try a Google search on “auto leveling tinyG G38”, lots of hits.

    It seems that the basic method used is to redefine an Z limit switch to be NO, connect a wire to the mill bit and a wire to the workpiece; works fine for a circuit board target, not so much when milling wood or plastic.

    Seems that might work OK when milling metal in general.
    You could just hit the Z limit, shutting down tinyG, then restart tinyG and Z will be a a new zero point.
    Chilipeppr is much more sophisticated – probing an area and compensating for probe variations by in-line modification of GCode.

    That help?

    • This reply was modified 9 years, 11 months ago by cmcgrath5035.
    #7193
    mristau
    Member

    Thanks for your notes. Looks most helpful!

    #7324
    mristau
    Member

    For this process to work, switch settings are changed to NO. Makes sense as does connecting a sensor/switch to Zmin terminal of TinyG.
    However, are other settings for z axis changed as well?
    …like:
    $ztn=-95.000 (travel minimum)
    $ztm=0.000 (travel maximum)
    $zsn=0 (z switch min, 0=off,1=homing,2=limit,3=limit+homing)
    $zsx=1 (z switch max, 0=off,1=homing,2=limit,3=limit+homing)

    (I’m just using CoolTerm to send commands and text files to TinyG.)

Viewing 6 posts - 1 through 6 (of 6 total)
  • You must be logged in to reply to this topic.