Scribe Setup How to


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  1. #1
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    Default Scribe Setup How to

    Ok guys I finally got time to finish the scribe on the plasma table and get it working perfectly. The plasma table to took a backseat for a few months after I was laid off May 30 from my engineering job then was moved across the country to NC for my new job that I started July 9. I'll let you guess where I got a job at. On to the fun.

    Parts list.
    Chicago pneumatic scribe CP-9361
    THK HSR20 rail

    AVS-5312-120A 4-way (2 position) Use this one for a double acting cylinder
    AVS-3312-120A 3-way (2 position) For supplying air to the scribe
    SBC-14N Silencer cones. (Brass looking things)
    MS14-14N - MALE STRAIGHT 5/PK FOR 1/4iN OD PUR/NYLON & 1/4in MNPT

    #10-32 port to 1/4 OD tubing - used on the 7/16 cylinder
    ME14-10N - MALE ELBOW 5/PK FOR 1/4in OD PUR/NYLON
    ME14-10N - MALE STRAIGHT 5/PK FOR 1/4in OD PUR/NYLON

    PU14BLU100 Blue tubing
    PU14RED100 Red tubing

    A07060DN 7/16 Bore double acting cylinder 6in stroke
    Scribe regulator AR-323 - REGULATOR, 1/4 IN NPT, 130 PSI, GAUGE, BRACKET
    Air cylinder regulator AR-322 - REGULATOR, 1/4 IN. NPT, 60 PSI, GAUGE, BRACKET
    Plus a random spring from Home Depot since my air valves will only activate above 10 PSI so I needed way to up the pressure without putting to much pressure on the scribe.

    Regulator and valve setup.




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  2. #2
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    Scribe regulator is run around 125 PSI and cylinder pressure will vary depending on your setup and spring, mine is at 20 PSI due to the spring and little bit of friction from the linear rail.

    Baseline Sheetcam Post for MP1000 - THC- Scriber post
    --************************************************
    --*** Set these values up to suit your machine ***
    --************************************************

    --this is the distance between each torch reference in MILLIMETRES
    refDistance = 250

    --this is the reference feed rate in mm/min
    refFeed = 500

    --Put your switch offset value here in MILLIMETRES
    switchOffset = 1.5

    --Scriber X,Y,Z offsets in MILLIMETRES. Do not use inches here even if you want inch code
    --Use the special code 'nil' on the Z axis to disable it.
    --In that case no Z values will be output at all while scribing.
    --e.g scriberZ = nil
    scriberX = 0 Value you will change later on
    scriberY = 0 Value you will change later on
    scriberZ = nil This is how it should appear.

    --scriber axis. Leave this as nil if the scriber is fixed to the same axis as the torch
    --scriberAxis = "A"
    scriberAxis = nil

    --If this value is set to true then use G28 (home) for the Z reference
    --Set it to false for G31 probe
    refHome = true

    --The cutter will slow down for corners and turn off THC below this radius
    slowRadius = 10

    --Minimum slow down speed.
    --This is a scale factor. For instance 0.5 = 50% of the current feed rate
    slowPercent = 0.4

    --THC on and off codes. Use nil if you don't want THC control e.g:
    -- thcOnCode = nil
    -- thcOffCode = nil

    --here is another example that use M667 and M666
    --thcOnCode = " M667"
    --thcOffCode = " M666"

    thcOnCode = nil
    thcOffCode = nil

    --************************************************
    --*** End of settings ***
    --************************************************

    Now lets make a alignment post to see how much offset we need in the post.

    Measure you tip to the plasma table. Mine came out to around .375. I perfer to make the center of the target at (0,0) for ease of calculating offset. Remember the plate marker tool must have a tool number 100 or higher. Mine starts at 102 then goes up to according to the speed of movement.



    Post the code and lets load it on Mach3. Find a empty spot on your plate with some spare room around it. I perfer to use a heavy plate so nothing moves when engraving.


    Run the program. You notice the circle is away from your torch tip when your done. This is the offset that needs to be programmed into the Sheetcam Post.


    To figure out the offset of the scribe the quickest and easiest we are going to use the DRO on Mach3. Center the tip of the Plasma torch over the circle.


    Now we have the offset in Mach3 that we need to program into sheetcam.




  3. #3
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    Record the Values from Mach3 onto a piece of paper. Before we can enter the offsets into sheetcam we need to convert to mm so off to google to convert if you dont feel like calculating the value. P.S. 1in = 25.4 mm

    Google search: "2.2262in to mm" Lazy man method.

    Code editting time

    --************************************************
    --*** Set these values up to suit your machine ***
    --************************************************

    --this is the distance between each torch reference in MILLIMETRES
    refDistance = 250

    --this is the reference feed rate in mm/min
    refFeed = 500

    --Put your switch offset value here in MILLIMETRES
    switchOffset = 2.8575

    --Scriber X,Y,Z offsets in MILLIMETRES. Do not use inches here even if you want inch code
    --Use the special code 'nil' on the Z axis to disable it.
    --In that case no Z values will be output at all while scribing.
    --e.g scriberZ = nil
    scriberX = -110.99 Values I got for my table.
    scriberY = 35.2425 Values I got for my table.
    scriberZ = nil

    --scriber axis. Leave this as nil if the scriber is fixed to the same axis as the torch
    --scriberAxis = "A"
    scriberAxis = nil

    --If this value is set to true then use G28 (home) for the Z reference
    --Set it to false for G31 probe
    refHome = true

    --The cutter will slow down for corners and turn off THC below this radius
    slowRadius = 10

    --Minimum slow down speed.
    --This is a scale factor. For instance 0.5 = 50% of the current feed rate
    slowPercent = 0.4

    --THC on and off codes. Use nil if you don't want THC control e.g:
    -- thcOnCode = nil
    -- thcOffCode = nil

    --here is another example that use M667 and M666
    --thcOnCode = " M667"
    --thcOffCode = " M666"

    thcOnCode = nil
    thcOffCode = nil

    --************************************************
    --*** End of settings ***
    --************************************************

    When entering the values into the post, a postive value on mach3 will be a negative value for the sheetcam post and so on. Run one more test target but now your torch will shift over while the scribe is marking then center back over the target when the scribe is done. Now go have fun with your new scribe. I know I did.





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    Thanks you for sharing this info mate it was really helpful
    Lewis



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