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New wasteboard using v-slot extrusions

Posted: Tue Mar 19, 2019 9:41 pm
by rrohowetz
I just finished assembling my S3 XL a couple of weeks ago. I am about to surface level my supplemental mdf table. I had mapped the factory wasteboard. The factory wasteboard was about .03" higher on one end than the other. The front to back tolerances were pretty good - .004" variation. I noticed that when I was mapping the mdf wasteboard I could get a .01 deflection by moderately pressing down on the wasteboard. I am wondering if anyone has made a wasteboard out of v-slot extrusions? I have seen some commercial machines with this type of bed using the 2020 or the 2080 extrusions. If so did you have any problems and how did it work out?

Re: New wasteboard using v-slot extrusions

Posted: Mon Nov 04, 2019 5:13 pm
by Dallas
I just finished upgrading my wasteboard to t-slot extrusions last night. Previously I had a single piece MDF wasteboard with a zillion 1/4-20 thread inserts everywhere (except where I needed them on any particular job :lol: )
IMG_6855.jpg (92.67 KiB) Viewed 3251 times
I wanted the option to use lubricant/coolant when cutting metal without destroying the wasteboard. I also figured the aluminum extrusion would give the Shapeoko more rigidity. The threaded aluminum plates were way too expensive so I found some cheap 8020 from China.

I opted for a 'bread board' style assembly (if you're familiar with woodworking).
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Two long pieces that run the length of the gantry in the x direction and filler pieces between running in the y direction. The extrusion I was using was 2060 (20 mm x 60 mm) so I cut the filler pieces 18 1/8" long and the two long pieces 28" (iirc).

I used mounting plates (on the bottom of the assembly) to hold it all together.
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The 18 1/8" was about a 1/16" too long and I struggled to get the Shapeoko mounted to the wasteboard without elongating the mounting holes.

I managed... but there was lots of colorful language involved.

I haven't trammed the Shapeoko or checked for flatness yet. I can say that the front metal piece that connects the left and right y rails was bowed in the middle. I had to get out a clamp to bring it down to the aluminum extrusion to get the t-nuts to thread properly.

I'm pretty sure the bow was in the rail and not the extrusion. I noticed the bow when compared to the previous MDF wasteboard.

At any rate, I now have a zillion t-slots to clamp my future workpiece. Hopefully they'll be in the right places. :shock:

Since I don't want to cut into the aluminum extrusion, I plan on using some 1/4" hardboard as an underlayer when I need to cut completely through my workpieces.

Re: New wasteboard using v-slot extrusions

Posted: Wed Nov 06, 2019 1:32 am
by WillAdams
Way cool!

Are the mounting plates a standard part? If so, purchase link?

Re: New wasteboard using v-slot extrusions

Posted: Tue Nov 26, 2019 12:47 pm
by Dallas
Sorry for the delay Will; I wasn't keeping up to date on the forums.

Here's the link on Alibaba to the mounting plates: ... 2fc2CqXs8e

I believe I paid 98 cents a piece when I bought 25.

I think you can order directly from their website at: ... 1ef7zcTNM5
although I went through Alibaba. Their customer service rep, Nina, was helpful and the material arrived just as described. I'd order from them again, no worries.

By the way, here's the link for the 8020 extrusion I ordered, also off Alibaba. Best price I could find: ... 2fc29kQvrj

At the time that I bought it, it was only $3.40 per meter. I needed 8 meters for my breadboard style waste board. By the way, you don't need to order in meter quantities. You could order custom lengths which is what I'd do next time (instead of ordering meter pieces and having to scrap the cut offs).

Shipping, by the way, may exceed the cost of the material itself. But I looked on eBay and Amazon and this was the best deal I found. YMMV

All the best,


Re: New wasteboard using v-slot extrusions

Posted: Thu Nov 28, 2019 1:12 am
by WillAdams
Those are some good prices. Last time I was pricing this sort of thing out I was looking at Grainger/Fastenal trying to avoid shipping.

I really wish I could find angle with a hole spacing which would match an extrusion --- I think that would help keep the cost on this sort of thing down --- not finding it deterred me, since I really didn't want to have to drill that many holes. The mounting plates are a neat work-around.

Re: New wasteboard using v-slot extrusions

Posted: Wed Dec 18, 2019 7:21 pm
by Duke
I looked this extrusion up on Alibaba, and while the price on extrusion is attractive, it looks like they don’t offer any break on shipping multiple pieces.

One piece is $32 with shipping
And 10 pieces are $215 with shipping
20 pieces for a 1meter square table would be $430