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Thread: G0602 10x22 LATHE 3 STEP CNC CONVERSION

  1. #37
    Registered Crevice Reamer's Avatar
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    Time to drill some number 7 holes, while keeping them straight:


    Here are some nice straight holes. All but one are straight through, and that one exception is about one inch deep. The hole pattern is calculated both to be in the most meat and to allow the frontplate to be used later for stage two:


    My $10 HF SAE tap set has certainly earned its keep. It shows no sign yet of anything wearing out. (Ditto for the $10 Metric set) Here it is tapping some 1/4-20 holes:


    Again, the idea is to be careful and keep the tap straight. Next to clean everything up with a paper towel and some rubbing alcohol--or WD-40:



    CR.

    Attached Thumbnails Attached Thumbnails G0602 10x22 LATHE 3 STEP CNC CONVERSION-100_4775_edited-jpg   G0602 10x22 LATHE 3 STEP CNC CONVERSION-100_4776_edited-jpg   G0602 10x22 LATHE 3 STEP CNC CONVERSION-100_4777_edited-jpg   G0602 10x22 LATHE 3 STEP CNC CONVERSION-100_4809_edited-jpg  

    Last edited by Crevice Reamer; 06-18-2010 at 07:39 PM. Reason: Add pics
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  2. #38
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    Default MOUNTING THE Z STEPPER FRONTPLATE TO LATHE

    Let's bolt her up with some 1/4-20 x 3/4 inch socket head screws:










    CR.

    Attached Thumbnails Attached Thumbnails G0602 10x22 LATHE 3 STEP CNC CONVERSION-100_4797_edited-jpg   G0602 10x22 LATHE 3 STEP CNC CONVERSION-100_4798_edited-jpg   G0602 10x22 LATHE 3 STEP CNC CONVERSION-100_4799_edited-jpg  
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    Making good progress there CR.

    How are you planning to do the motor cabling and connectors? On Z I have mine ugly and temporary (since 2004 .

    On X I used one of those little cast aluminium electrical housings, attached with two M3 screws into the Motor end housing. Worked really well, I have simple terminal strip connecting the motor wires to the cable, which exits down a conduit. Keeps all the swarf out well.

    Regards,
    Mark


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    Quote Originally Posted by RotarySMP View Post
    Making good progress there CR.

    How are you planning to do the motor cabling and connectors?
    Thanks Mark.

    Z motor temporary wiring is run through a conduit under the lathe. (Well, beside it actually) Cable wires are twist spliced and taped for now. In final form, the wires will be soldered and heat-shrinked. I am using terminal strips extensively.

    CR.

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    I intend for this mount to be only temporary, and so have left it in a raw state. It occurs to me though, that some of you might want a more attractive end result--Even for Stage One. If there is enough interest, I will finish this Stage one Z mount out and post pics.

    Would anybody like to see that?

    CR.

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    I wanted to use the existing Lathe Estop position for the G540 electronics also,



    but it is a Single Pole Single Throw Normally Closed switch. There are no contacts to connect the G540 Estop through. This would require a Double Pole Single Throw switch, but DPST NC switches are expensive and hard-to-find. Sure, I could use a relay, but that introduces a level of complexity and possible failure. IMO, an Estop needs to be simple and failsafe.

    Fortunately, the normal $10 Estop switch that Keling sells has removable NC and NO contact modules:


    It would be nice to be able to just buy an extra NC module, but I couldn't find any. Probably only for sale by the thousands anyway.

    By combining the two Keling switches that I already have, a DPST switch can be made:

    1) Carefully pry up the retaining clips and wiggle/slide off the green NO module:




    2) Now do the same to the donor switch, only removing the red NC module.

    3) Slightly trim the short dovetail on the red module so it will fit together with the other red one. Here illustrated on a green module:


    4) Now slide the donor red module into the slots of the newly configured switch and snap them together:


    Voila! a successful module transplant and a DPST Estop switch for cheap. Sponge please nurse:


    5) Unplug the lathe, unscrew the front panel and turn the existing Estop knob counterclockwise until it clicks free. Remove existing Estop switch:



    6) Extend it to the left, loosen terminal screws and slide off wiring (They are slotted terminals):


    7) Install wiring onto new DPST Estop switch. It doesn't matter which wire goes where, as long as both wires are on just one module. I used the side closest to start switch:


    8) Unscrew knob from new switch. (counterclockwise)

    9) Unscrew chrome nut.

    10) Install new switch thru hole from inside.

    11) Attach chrome nut.

    12) Screw mushroom knob back onto switch.

    That's it boys and girls. There is now a red module just waiting for the Estop wire from G540 and then to PSU ground:



    Waste not want not: The perfectly good old lathe Estop switch will now serve on another project--taking the place of the donor Keling switch.

    And I now have a DPST NO Estop switch good for something if I can ever think of a use for it.

    CR.

    Last edited by Crevice Reamer; 06-20-2010 at 11:34 AM.
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    I would love to see pics of the finished z mount. Would be cool to see you CNC something on the sx3 gold plating never hurt anyone! i kid. but the more pics you post the merrier



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    Quote Originally Posted by Teyber12 View Post
    I would love to see pics of the finished z mount.
    OK. Here you go:







    A little paint can go a long way. Next a motor cover.

    CR.

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    Who can guess how I made this motor cover?



    CR.

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    Quote Originally Posted by Crevice Reamer View Post
    Who can guess how I made this motor cover?


    CR.
    Looks like some sort of leather seat covering stretched over it.

    Last edited by Magnum164; 06-21-2010 at 10:02 PM. Reason: removed picture from reply


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    Quote Originally Posted by Magnum164 View Post
    Looks like some sort of leather seat covering stretched over it.
    Good guess, but nope, that's not how. No leather, no cloth.

    Guess again.

    CR.

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    Quote Originally Posted by Crevice Reamer View Post
    Good guess, but nope, that's not how. No leather, no cloth.

    Guess again.

    CR.
    Haha.. Very large heat shrink

    But final guess is it must be vinyl covering.....

    Last edited by Magnum164; 06-21-2010 at 10:51 PM.


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