4 Axis mod ?

discussion of design changes / improvements / suggestions
cvoinescu
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Re: 4 Axis mod ?

Post by cvoinescu » Wed Oct 10, 2012 12:14 am

Improbable Construct, are you converting a ShapeOko into a 4-axis milling machine, or into a lathe? It sounds like a milling machine, but several people mentioned lathes, so I'm not sure.
Proud owner of ShapeOko #709, eShapeOko #0, and of store.amberspyglass.co.uk

Improbable Construct
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Re: 4 Axis mod ?

Post by Improbable Construct » Wed Oct 10, 2012 12:47 am

With any luck and a bit of time I hope to have a 4 axis Shapeoko.
I have upgraded every part of my Shapeoko so I took the left over parts and rebuilt my original stock size Shapeoko mechanicals (I only needed some V-wheels and spacers)
I'm still deciding if I want to go to nema 23 motors for the big machiene or stick with the nema 17 motors.
So far I have not exceeded the torque of the 69 oz/in motors I have so I don't know it the added cost is worth it.
I plan to start with the stock size shapeoko for my 4 axis machine and then extend the Y axis if it works.
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Shapeoko 1 # ???? Stainless plates, still in the box.
Shapeoko 2 # 3926 not stock
Shapeoko 3 # 0003
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levlandau2
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Re: 4 Axis mod ?

Post by levlandau2 » Wed Oct 10, 2012 12:50 am

ok sounds good. So servo motors are just regular DC motors.

PsyKo
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Re: 4 Axis mod ?

Post by PsyKo » Wed Oct 10, 2012 7:09 am

Improbable Construct, please keep us in touch of your success in upgrading the ShapeOko to a 4 axis CNC. Why not a build log ? :D
Shapeoko #736
Kress 800, Z Axis upgrade, dual Y, 600mm X&Y rails, metal spacers and V Wheels, home switches, 4th axis
Goko - Free CNC Control Software - http://www.shapeoko.com/forum/viewtopic ... 380#p44380

Jimmy0x52
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Re: 4 Axis mod ?

Post by Jimmy0x52 » Thu Jan 03, 2013 3:35 am

IC I saw this in another board. It's the pic of a 4 axis that's about $5K.

Looks like a good way of possibly adding a 4th to the 'Oko? Not sure what the spinning portions are, but the standard aluminum extrusions setup looks straightforward.

Image

PsyKo
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Re: 4 Axis mod ?

Post by PsyKo » Fri Jan 04, 2013 7:10 pm

As mentionned in another post, I'm also working on a rotary device that could be used on the Shapeoko, on multiple axis.
This is simply a rough design. I'm not even sure this is realisitc.
The shaft will be turned using gears or teethed pulley. The stepper motor will be a Nema 17 or 23.

I still have issues to fix such as which CAM software to use, the corresponding electronic or how to easily align it with the Shapeoko. (And of course, creating a prototype :) )
Maybe I'll use it as manual rotary device, with a keyboard to select the desired angle.
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Shapeoko #736
Kress 800, Z Axis upgrade, dual Y, 600mm X&Y rails, metal spacers and V Wheels, home switches, 4th axis
Goko - Free CNC Control Software - http://www.shapeoko.com/forum/viewtopic ... 380#p44380

minorthreat
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Re: 4 Axis mod ?

Post by minorthreat » Fri Jan 04, 2013 10:30 pm

Jimmy0x52 wrote:IC I saw this in another board. It's the pic of a 4 axis that's about $5K.

Looks like a good way of possibly adding a 4th to the 'Oko? Not sure what the spinning portions are, but the standard aluminum extrusions setup looks straightforward.

]

Looks like a clamp-on rotary axis. What you're seeing there is the tail stock... Kind of a neat idea but personally i see some easier low hanging mods before going 4 (or 5) axis.
Last edited by minorthreat on Sun Jan 06, 2013 8:05 am, edited 1 time in total.

bobt
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Re: 4 Axis mod ?

Post by bobt » Sat Jan 05, 2013 6:55 am

If you look on Bart's site he has already designed one of these.

Bob Teeter
"What Box???" ShapeOko #397

roberlin
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Re: 4 Axis mod ?

Post by roberlin » Tue Jan 08, 2013 4:21 pm

the one I remember from Bart's site was for a laser... I'm not sure if it would hold the workpiece firmly enough for milling.

damagi
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Re: 4 Axis mod ?

Post by damagi » Sun Feb 10, 2013 3:25 pm

Any Updates on this?

The size of motor needed for the chuck varies I would think. Certainly full sized chucks need to be beefy, but that's when you are spinning bowls are very high speeds. There are much smaller, or even custom made chucks, which should be sufficient for the 4th axis as rotating the object.

I have seen a variety of "extra" axis suggestions for various CNC machines, haven't found a great reference for the definitive list. ie: Tilt the z axis head, "roll" the workpiece, "rotate" the workpiece. is there a good site which shows the axis combos, as well as what new capability each adds?

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