Newbie Hello! 1994 Shoptask XMTC - modded

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Thread: Hello! 1994 Shoptask XMTC - modded

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    Default Hello! 1994 Shoptask XMTC - modded

    Hello all! I've had my 1994 Shoptask 17-20 XMTC (the white one) for many years. I've upgraded a bit (Gecko540, Mach3, VFD motors, etc) and used it primarily as a CNC lathe with TECO L510 VFD and .75HP motor.
    More recently I decided to get the mill working and I have spindle related questions.

    On the mill side, I installed an identical TECO L510 VFD and a .75HP motor @ 1780RPM. This puts the spindle at about 2800rpm on my handheld tach.

    I'm used to milling aluminum at +5000rpm on a different machine (Tormach 1100PCNC) and am curious if the Shoptask spindle is safe to run above the 3000rpm mark. These are essentially tapered trailer bearings, so I'm not sure what they would be rated for.
    If I'm limited to 2800rpm, do you normally just adjust F&S with 2800rpm limit or are there any tricks for milling AL at slower RPM? More or less flutes? AL specific tooling?

    I'll post some photos if there's interest. I don't think it's too much more modded than the next guy's though.

    Thanks.
    -Rich

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    Default Re: Hello! 1994 Shoptask XMTC - modded

    The bearings on your machine are Timken numbers 7008X and 7007X tapered rollers. They are available in a variety of precision , heat and RPM ratings. I'm sure there is one that will suit your needs. Here is a link to the Timken engineering catalog

    https://www.timken.com/wp-content/up...ng-Catalog.pdf



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    Default Re: Hello! 1994 Shoptask XMTC - modded

    rich...what motors did you end up going with nema 34?
    i purchased a cnc version of your machine...but the zed axis motor shaft was broken so im going to throw on a nema34...ill still use the molex connectors..
    mine came with the TMG Digital-CNC controller box.
    1993 technology...

    do you have any shots of your setup..
    any cool things you have made with it?

    i was also thinking of upgrading the lather and mill motor to dc...
    with speed control instead of a vfd.

    is the vfd you bought working well>
    do you have the lather and mill working off the same vfd?


    sorry for all the questions

    hmmm


    merry xmas



    Quote Originally Posted by SupraRich View Post
    Hello all! I've had my 1994 Shoptask 17-20 XMTC (the white one) for many years. I've upgraded a bit (Gecko540, Mach3, VFD motors, etc) and used it primarily as a CNC lathe with TECO L510 VFD and .75HP motor.
    More recently I decided to get the mill working and I have spindle related questions.

    On the mill side, I installed an identical TECO L510 VFD and a .75HP motor @ 1780RPM. This puts the spindle at about 2800rpm on my handheld tach.

    I'm used to milling aluminum at +5000rpm on a different machine (Tormach 1100PCNC) and am curious if the Shoptask spindle is safe to run above the 3000rpm mark. These are essentially tapered trailer bearings, so I'm not sure what they would be rated for.
    If I'm limited to 2800rpm, do you normally just adjust F&S with 2800rpm limit or are there any tricks for milling AL at slower RPM? More or less flutes? AL specific tooling?

    I'll post some photos if there's interest. I don't think it's too much more modded than the next guy's though.

    Thanks.
    -Rich




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Hello! 1994 Shoptask XMTC - modded

Hello! 1994 Shoptask XMTC - modded

Hello! 1994 Shoptask XMTC - modded