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Thread: Shoptask 2000 modified

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    Default Re: Shoptask 2000 modified

    Here's an update on my mods. If anyone's interested
    Shoptask 2000 modified-20170310_123819-jpg

    Attached Thumbnails Attached Thumbnails Shoptask 2000 modified-20170310_123819-jpg  


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    Default Re: Shoptask 2000 modified

    Quote Originally Posted by LtDan View Post
    Here's an update on my mods. If anyone's interested
    Shoptask 2000 modified-20170310_123819-jpg
    Dan,
    Looks like not much left of the original machine but the bench,base casting and mill table. What did you use to make all the parts? Looks like a great build if you could post some more details on all you have done. Got a kink in my neck trying to look at the one picture.



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    Default Re: Shoptask 2000 modified

    As you can see I used the lathe headstock spindle which has a MT4 taper you can find collets on ebay they take a 1/2-13 drawbar. I achieved more possibilities with this by mounting the lathe chuck. I have a HF spindle that I can mount on the table and use the main spindle as an A/4th axis.
    As far as making putting this project together. I used a craftman drill press, a magnetic drill press and a surface grinder.



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    Default Re: Shoptask 2000 modified

    great job, so what is the other milling machine you used to build it, like instructor37 said not much of the original machine left. The only thing that looks similar to my 1991 shoptask is the green vice.



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    Default Re: Shoptask 2000 modified

    This is interesting and deserves a full build blog, one photo is not enough for me.

    Russell C of Idaho
    Big trains and big dreams...


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    Default Re: Shoptask 2000 modified

    Quote Originally Posted by RussellCofID View Post
    This is interesting and deserves a full build blog, one photo is not enough for me.
    Not sure exactly what you mean, please explain in detail, thanks



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    Default Re: Shoptask 2000 modified

    Quote Originally Posted by CAD226B View Post
    Not sure exactly what you mean, please explain in detail, thanks
    I was referring to LtDan's picture, the subject of this post.

    Russell C of Idaho
    Big trains and big dreams...


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    Default

    Quote Originally Posted by CAD226B View Post
    Not sure exactly what you mean, please explain in detail, thanks
    Gimme some time this weekend and I'll put together everything I did!



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    Default Re: Shoptask 2000 modified

    I stayed more loyal to the form factor, taking a Patriot removing all the bondo, paint & grinding the castings more accurate to their intended shape, powder coating everything, dual balls screws gas springs, & on & on.... I even bought a Biax scraper to finish out all the bearing surfaces, almost 6 mos. I spent doing just that!! My wife thought I was nutz when I brought the surface plate, scraper, & the saddle in the house because the garage was simply too cold.

    I like your angle of attack better though.

    It looks like for you ways you're using linear rails bolted to a bed, is the bed the original casting or is it something new altogether? Are the vertical ways the same as the horizontal ways? How did you avoid deviations where the linear rails are bolted to the casting? Sorry got a million questions in my head...

    Wormwood



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    Quote Originally Posted by wormwood View Post
    I stayed more loyal to the form factor, taking a Patriot removing all the bondo, paint & grinding the castings more accurate to their intended shape, powder coating everything, dual balls screws gas springs, & on & on.... I even bought a Biax scraper to finish out all the bearing surfaces, almost 6 mos. I spent doing just that!! My wife thought I was nutz when I brought the surface plate, scraper, & the saddle in the house because the garage was simply too cold.

    I like your angle of attack better though.

    It looks like for you ways you're using linear rails bolted to a bed, is the bed the original casting or is it something new altogether? Are the vertical ways the same as the horizontal ways? How did you avoid deviations where the linear rails are bolted to the casting? Sorry got a million questions in my head...

    Wormwood
    I did use the original bed and put it on a surface grinder as with all surfaces I bolted rails to. All surfaces and bearing mounts were ground to .00005 in flatness. The vertical rails are designed for vertical mounting as the horizontal rails are for there intended use.
    I spent 2 years finding parts on ebay and 2 winters doing all the work. It will hold .0001 accuracy full travel on all 3 axis. I still have quite a few things to do to finish but for now it is operable. With summer here I dont have the time to finish so it will be fall/winter when 100%
    The rails are THK 35mm and 25mm. The ballscrews are Kuhn swiss 25mm with 5mm pitch no backlash.

    Last edited by LtDan; 06-13-2017 at 01:28 PM.


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    Default Re: Shoptask 2000 modified

    LtDan,
    I think we are ALL patiently waiting for your build log or something...
    Now I'm not rushing you or anything but I will say it's been over a month now since your last post...

    I'd imagine some of us may start yawning before long...

    Wormwood



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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.



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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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    Member Kenny Duval's Avatar
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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.



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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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