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Thread: Shoptask 2000 modified

  1. #13
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    Default Re: Shoptask 2000 modified

    Shoptask 2000 modified-20151212_173528-jpgSorry Worm and to others interested. I work 12hr shifts and have had ot days. And its summertime haha gotta put the toys to use before winter comes. Anyway.


    So lets do this overtime like when I have an extra hour couple times a week.
    Here is the original Shoptask 2000 machine.Shoptask 2000 modified-17-20-gold-bench-250x250-jpg
    I got tired of chasing the backlash and deviations and always wanted to build this thing to best it could be. So over 3 yrs I waited for deals on ebay and other sources to collect all the parts I needed.

    Step 1 Tear it all apart and fill the base cast with a mixture that EWAG uses in hp cnc grinders. Seems to be crushed granite with an epoxy.
    Shoptask 2000 modified-20150829_123306-jpg then to the surface grinder at work. The original table took a shuffle on the grinder as well. finished both to .0001

    Sorry I dont have all of the detailed pics to this build but am digging up a few.
    The rails that are on the bed are THK KX series 35mm width.
    The rails on the table are THK SR25
    The carriage plate is 7000 aluminum 1.25" thick ground as well or more like polishing it.

    Here is another pic thinking about mounting plates for the screws and motors.
    Shoptask 2000 modified-20150922_175024-jpg
    The Z column I made from 4130 plate welded then surface ground. Base is 1.25 thick and column is .75 thick Then filled with the epoxy mixture. The rails are THK HSR 55mm width.
    All 3 ballscrews are Kuhn hybrid precision from switz I think there a little above styeinmeyer in quality. They are all 25mm diam. 5mm pitch
    I used INA angular contact bearings for all supports. The bolt on type to make it easier to float in align screws.
    The Headstock for the mill is the lathe headstock from the original machine setup on a grinder at work to make the base perfect with the bearing bore.
    Then used the lathe spindle accompanied by 4 hp angular bearings.
    Shoptask 2000 modified-20151212_173528-jpg
    At this point I got bored so started building the control cabinet.
    Shoptask 2000 modified-20161022_224609-jpgShoptask 2000 modified-20161022_224609-jpg
    I will try to make another post tomorrow night. Thank you for the patience.



  2. #14
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    Default Re: Shoptask 2000 modified

    For those wondering how much the cost and why. The mechinacal parts rails, screws, motor mounts, couplings,bearings, metals misc hardware total cost was
    $1300 must be patient and the parts you need will pop up. may need to cut modify.
    The cnc control box and motors was $3100 wasnt much to save here unless you piece used stuff together ugh not for me when it comes to the heart of the machine.
    original machine cost used $750
    Total $5150
    There is nothing out there that will do what this thing does for size and cost. It responds very fast, smooth, and accurate. travel is z16.5 y16.5 x 11.5 rapids of 400in/m
    Worm I'll get another post up tomorrow night



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    Default Re: Shoptask 2000 modified



    repeatabilty test



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    Default Re: Shoptask 2000 modified


    New spindle pulleys 6k



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    Default Re: Shoptask 2000 modified

    Got my probe mounted now to start with the programming
    Shoptask 2000 modified-20170831_121226-jpg



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    Default Re: Shoptask 2000 modified

    Holy Crap! I just realized you updated this thread! The work is outstanding, I imagine the fit & finish is just as good. I understand the cost of all the components but you refer to the sum total. Since you collected everything over two or three years it didn’t really matter. I assume you didn’t anodize the aluminum or tool black or equiv. To tread the bare metal surfaces? The epoxy & granite might be more like corian, either case epoxy with sand, alumnium, or granite/marble dust is very common & as strong as a rock.

    What are the axis motors, they sound like they’re pulling a lot of current?? I assume you’re running mach3?

    The one thing I really miss is being able to run the CNC manually, it becomes really a hassle without hand wheels just to surface something or make a simple cut.

    Wormwood



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    Default Re: Shoptask 2000 modified

    Quote Originally Posted by wormwood View Post
    The one thing I really miss is being able to run the CNC manually, it becomes really a hassle without hand wheels just to surface something or make a simple cut.

    Wormwood
    A handheld pendant or hell even the keys of a keyboard make that trivial. You don't need the hand wheels.



  8. #20
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    Quote Originally Posted by wormwood View Post
    Holy Crap! I just realized you updated this thread! The work is outstanding, I imagine the fit & finish is just as good. I understand the cost of all the components but you refer to the sum total. Since you collected everything over two or three years it didn’t really matter. I assume you didn’t anodize the aluminum or tool black or equiv. To tread the bare metal surfaces? The epoxy & granite might be more like corian, either case epoxy with sand, alumnium, or granite/marble dust is very common & as strong as a rock.

    What are the axis motors, they sound like they’re pulling a lot of current?? I assume you’re running mach3?

    The one thing I really miss is being able to run the CNC manually, it becomes really a hassle without hand wheels just to surface something or make a simple cut.

    Wormwood
    The axis motors don't make to much noise. They are ac servo. the sound is mostly the screws. And yes eventually a pendant for now the keys work fine. When I install the motor cover for x I'll remove the motor and record for you. Thanks for the compliments. Yes bare aluminum. Yes mach3. And manually machining is way easier on a cnc than handwheels on screws is my opinion.



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    Default Re: Shoptask 2000 modified

    Very nice work!



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    I can’t imagine not having at least one manual mill. We run them with powerfeeds so in most cases it’s much quicker to make parts than to bother with CNC. CNC is great for repetitive production but for a weekend warrior it’s probably overkill. I have some parts I make that are too much a hassle for CNC due to all the positional and tooling changes it’s just as easy to sit there and run the powerfeed levers and make two parts at a time. Unless you can walk away and do another project it really isn’t helping you. Perhaps an ATC would improve some aspects but having to change fixtures 4x an hour doesn’t give you much time to step away anyways. Definitely recommend having a manual version of anything you have for CNC. Presuming you have the available space and funding isn’t an issue.

    The one thing I really miss is being able to run the CNC manually, it becomes really a hassle without hand wheels just to surface something or make a simple cut.

    Wormwood[/QUOTE]



  11. #23
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    How has that servo worked for you driving the spindle? I have a 1.8kw just for the z axis screw using a 40mm 2 pitch screw in the one particular mill. Have had thoughts about going to a servo but my vector drive and 3hp 3ph motor has been fantastic 0-8000 rpm and can crawl at hand rotational speeds so tapping isn’t an issue. Not sure I see the benefit at this point but I am considering possibly installing one on the lathe and adding a sub spindle to it. It’s all projects and not enough time right? I laugh when we have shelves full of CNC conversion kits, servos, steppers, ballscrews, drives, etc.., and wondering how many years before all are completed :-)


    Quote Originally Posted by LtDan View Post
    Here's an update on my mods. If anyone's interested
    Attachment 354342




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