5 Attachment(s)
Re: Shoptask 2000 modified
Attachment 368518Sorry 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.Attachment 368506
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.
Attachment 368510 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.
Attachment 368516
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.
Attachment 368518
At this point I got bored so started building the control cabinet.
Attachment 368520Attachment 368520
I will try to make another post tomorrow night. Thank you for the patience.
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
Re: Shoptask 2000 modified
Re: Shoptask 2000 modified
1 Attachment(s)
Re: Shoptask 2000 modified
Got my probe mounted now to start with the programming
Attachment 371826
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
Re: Shoptask 2000 modified
Quote:
Originally Posted by
wormwood
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.
Re: Shoptask 2000 modified