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  1. #37
    Registered wireb's Avatar
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    Some electronics notes...

    High speed optos HCPL2631 (dual channel)
    used for the following signals:
    Step, direction, Home X, Y, Z, A, and probe input.

    Low speed optos LTV713V (I already have a tube of them sitting around)
    used for the following
    Shutdown (X,Y,Z,A), FLT (XYZ, A), RST, EPO (in/out), A interlock, Limit min(X,Y,Z,A), Limit max(X,Y,Z,A), Vac control, buzzer/indicator, Z collision, Z temp

    Others ?? (going to take what ever lines are left over on the 3 pll ports and buffer them as well for future use)

    Need to go dig up the Pll port spec and see what massaging I need to do to interface between the optos and the 3.3V ports.



  2. #38
    Registered wireb's Avatar
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    Well have the interface card design 95% done. Pinout is listed here
    Junkbox CNC driver harness (google doc)

    and logic diagram attached below. Still have not closed on the power supply (on card 5V reg down from 12V for the machine or use one of my combo supplies). Going to build up the interface first and see what the actual current draw is on the machine side 12V and 5V rails.

    Well off to check what I have in stock and put in a digikey order for the rest.

    Attached Thumbnails Attached Thumbnails junkbox 18x7x7-junkbox_interface-jpg  


  3. #39
    Registered wireb's Avatar
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    Hmm looks like CNCzone converts images... Here is a zip file with the original PNG file. If you open it in a photo viewer you can zoom in and the values and flags are readable.

    Attached Files Attached Files


  4. #40
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    Default that's coming along...

    Hey Wireb- where did you get the touchscreen kit? ebay? how does one select these? e.g., what are the important metrics to review?

    thanks
    David



  5. #41
    Registered wireb's Avatar
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    That particular touchscreen came as a complete unit (LCD screen and digitizer in one unit manufactured by 3M). I happened to get this one as part of a lot of misc surplus parts I bought at a auction (Raw card line in the cities closed down also got a lifetime supply of SS nuts and bolts

    Under Ubuntu it was detected and worked out of the box as is.. Except, the axis were inverted and it did not cover the entire screen. After running the calibration utility to get the correct calibration constants and adding them to the X boot script it all works as expected. (took longer to find the commands and where to put them than it did to calibrate and update the scripts.)

    If your buying a touch enabled monitor just make sure it's usb and supports linux (some are serial / proprietary and may or may not work on linux without a lot of work if at all). If your going to convert a existing monitor you need to make sure the touch screen film is the correct size for your screen OR it allows to be cut down to the correct size (some can be cut most cannot)



  6. #42
    Registered wireb's Avatar
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    Made some more progress on the drivers. Got 1 of 3 layers all wired up and working on the second. Plus got the enclosure cut and ready to to.

    Attached Thumbnails Attached Thumbnails junkbox 18x7x7-img_1198-jpg   junkbox 18x7x7-img_1196-jpg   junkbox 18x7x7-img_1194-jpg   junkbox 18x7x7-img_1193-jpg  

    junkbox 18x7x7-img_1192-jpg  


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