S3 XL Work Area Missing 4" at rear

Assembly questions and answers for the Shapeoko 3 CNC Mill
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Dewa.Designs
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Joined: Tue Aug 30, 2016 10:10 pm

S3 XL Work Area Missing 4" at rear

Post by Dewa.Designs » Sat Sep 03, 2016 5:39 pm

I've assembled my S3 according to the instructions (I think) with the DeWalt spindle. The advertising states that the work area is 17 x 33 inches, but mine is only 13 x 33 at best. The lost X axis dimension is at the rear of the machine where the Y gantry comes to a stop. The X axis does advance to the end of the X rails, but it leaves the spindle hanging out in empty space.
Attachments
IMG_1977.pdf
Y gantry all the way to the rear
(112.39 KiB) Downloaded 174 times
IMG_1976.pdf
Limited X axis rear travel
(97.05 KiB) Downloaded 162 times
IMG_1973.pdf
Showing X axis overtravel
(110.32 KiB) Downloaded 113 times

xfredericox
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Re: S3 XL Work Area Missing 4" at rear

Post by xfredericox » Sat Sep 03, 2016 5:58 pm

that is a correct statement

That is why I added a wasteboard that sticks out a bit on the front side.
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WillAdams
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Re: S3 XL Work Area Missing 4" at rear

Post by WillAdams » Sat Sep 03, 2016 8:14 pm

http://www.shapeoko.com/wiki/index.php/ ... 3#Overview
Cutting Area (note that this includes a 2 3/16" overhang area at the front of the machine)

Metric: 425mm x 425mm
Shapeoko 3XL #0006 w/ Carbide Compact Router w/0.125″ and ¼″ Carbide 3D precision collets

Dewa.Designs
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Re: S3 XL Work Area Missing 4" at rear

Post by Dewa.Designs » Sat Sep 03, 2016 11:58 pm

I'm not comfortable with an unsupported overhanging spoil board hanging out the front. It looks as if I could swap the left and right ends of the Y axis assembly to sacrifice Y axis length (about two inches per side) for X axis travel, resulting in the X axis motors towards the front rather than the rear. Is this feasible? I'm trying to machine from 16 x 32" blanks of material, but the more important dimension is the 16".

WillAdams
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Re: S3 XL Work Area Missing 4" at rear

Post by WillAdams » Sun Sep 04, 2016 12:15 am

while you could rotate the gantry motor plates, the intent of the placement is to protect/ hide the wiring and to balance the gantry.

The XL and XXL really need a supplemental wasteboard and a spoil board -- almost 1 1/2 inches of material which ought not to flex over a ~3" span. (Though you would need to route a groove or add a thin spacer for the front edge.
Shapeoko 3XL #0006 w/ Carbide Compact Router w/0.125″ and ¼″ Carbide 3D precision collets

cvoinescu
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Re: S3 XL Work Area Missing 4" at rear

Post by cvoinescu » Tue Sep 06, 2016 12:10 pm

Dewa.Designs wrote:The lost X axis dimension is at the rear of the machine where the Y gantry comes to a stop. The X axis does advance to the end of the X rails, but it leaves the spindle hanging out in empty space.
What the others said -- but, just so you know, you have the X and Y reversed from what we usually refer them as -- and, more importantly, from the instructions, the labels on the control board, the controls in the host software, and the way they're defined in CAD and CAM. The axis with two motors on stationary rails is the Y, and the one with one motor on the gantry is the X -- so the lost work area would come out of Y travel.

If you need them your way and you have the four-driver Carbibe Motion controller, you can swap them by recompiling GRBL with a different pin assignment; or, if you have the three-driver Sparkfun Stepoko, simply by swapping the X and Y motor connections (and reversing one of them).
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