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Thread: G0602 10x22 LATHE 3 STEP CNC CONVERSION

  1. #25
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    Thanks Mark!

    That uservo board looks interesting.

    I have been away for a few days. Should be back on the project tomorrow.

    CR.

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    Just some thoughts:

    Not everyone has a mill. I'm going to try to make at least the Stage ONE conversion using only the lathe and a drill press. So the next parts I make will be the ones that have to be turned before the manual controls are disassembled. Not that it would be very hard at any part of Stage one to revert to manual control.

    Before doing even THOSE parts though, my ways are crying out for a swarf cover.

    CR.

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    Default WAY COVER

    Now I can use the lathe for some manual turning, drilling and threading.



    Will have to temporarily bag up, or remove, the electronics though.

    CR.

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    Default MAKING STANDOFFS ON THE LATHE

    I used the mitre saw to cut some blanks. Could as easily have been a hacksaw:


    They actually came out close enough in length that they could have been used as-is. But that would not be very workmanlike:


    The cut edge is just a little rough:


    Best to face them up and they were cut a little long to allow for this. Here are all of the standoffs. Both sides are faced, centerdrilled, chamfered and ready for drilling/tapping from each side:


    The new way cover is excellent at catching swarf. Click on this video to watch:


    CR.

    Last edited by Crevice Reamer; 06-15-2010 at 06:17 PM.
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    The standoffs are finished. Here's one of them with its through-bolt:


    I used the mitre saw to rough cut the stepper frontplates:




    CR.

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    Good stuff. I like that you are taking this stepped approach to the conversion even though it gets you to your ultimate goal a bit more slowly. I think this thread will be a valuable resource for a long time.

    bob



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    Default Z STEPPER MOUNT FRONTPLATE

    Quote Originally Posted by rowbare View Post
    Good stuff. I like that you are taking this stepped approach to the conversion even though it gets you to your ultimate goal a bit more slowly. I think this thread will be a valuable resource for a long time.
    bob
    Thanks Bob! Yep, that's the idea. I hope so. Here's some more:


    The stepper frontplates and mechanical drive parts (Even the long bolts) will transfer to stage 2 & 3. Alas, the standoffs will not.

    Made this motor template from some scrap plastic, which had previously been used as a paint guide, but waste not want not. Just:

    1) Drill a 1/4 inch hole in the center of plastic.
    2) Fit motor shaft through.
    3) Scribe bolt holes and outside of motor mount frame.
    4) Drill and Cut:



    Apply template and mark through with scribe:


    This template will be used for Stage 2 also.

    Ok, we're theoretically doing Stage One without a CNC mill. (Or boring head) Just the lathe and a drill press--so how do we bore the needed 1 1/8 inch hole through 1/4 inch 6061 aluminum?
    >
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    Why with a 1 1/8 inch spade bit of course. They also come in stubby size if you don't have much height, and that is actually the better buy--More rigid:


    First time it cuts like butter, second time almost as easy. Third time a little harder. Towards the end of this video, I increased the speed from 500 to 1200 RPM. Gotta love a variable speed drill press. Click on this video to watch:


    A spade bit always leaves a little circle. The smoke you see at the end is that little cut-out disk turning friction-heat against the wood spoil base under it.



    CAUTION: DON'T TRY THIS WITH A HAND DRILL. MAKE SURE WORK IS SECURED FIRMLY IN A VISE. WEAR EYE PROTECTION!

    CR.

    Last edited by Crevice Reamer; 06-15-2010 at 06:23 PM.
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    Default Z MOTOR MOUNT

    Drilled and tapped some 10-24 holes into motor mount:


    Motor mounted up with standoffs. Through-bolts are 10x24x2 inch with lock washers under screw heads:


    CR.

    Last edited by Crevice Reamer; 06-16-2010 at 02:30 PM. Reason: Bolt size
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    Here's the completed Stage One Z stepper mount with mounting holes drilled for 1/4-20 screws:


    CR.

    Last edited by Crevice Reamer; 06-16-2010 at 07:48 PM.
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    Just got a call from UPS... Maybe mine will be in tomorrow... Will be a while before I can start to CNC it, but this is helpful information.



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    Congratulations Magnum! You have bought a terrific lathe. Hope it arrives all in one piece. I reckon you can use the uncrate & teardown info first:

    http://crevicereamer.com/Page_86.html

    CR.

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    Default PREPARING TO INSTALL THE Z STEPPER MOUNT

    This label will have to be removed:


    Someday, a One Touch Oiler pump will live here.

    There are two metal screws and also adhesive. Either remove the screws or chop off their heads flush. The label is peeled off carefully and installed to left side of base. The heat treatment referenced is only the ways. The label area is not hardened and is easy to drill.

    First, the mount is clamped lightly to the lathe:


    The motor shaft is inserted into the connector but is not tightened down. The mount is moved around until square to the lathe base, (Use a small square underneath) and connector is concentric to the large hole--then the clamp to the base is tightened.

    Make sure the connector is straight and not flexed.

    Make sure the mount is not high enough to prevent removal of the tailstock.

    Now a transfer punch is used to mark the hole locations:


    CR.

    Last edited by Crevice Reamer; 06-17-2010 at 09:38 AM.
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