New wasteboard using v-slot extrusions

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Joined: Sat Mar 16, 2019 5:51 pm

New wasteboard using v-slot extrusions

Post by rrohowetz » Tue Mar 19, 2019 9:41 pm

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?

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Re: New wasteboard using v-slot extrusions

Post by Dallas » Mon Nov 04, 2019 5:13 pm

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 73 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.
IMG_6840.jpg (133.53 KiB) Viewed 73 times
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.

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Re: New wasteboard using v-slot extrusions

Post by WillAdams » Wed Nov 06, 2019 1:32 am

Way cool!

Are the mounting plates a standard part? If so, purchase link?
Shapeoko 3XL #0006 w/Makita RT0701 Router w/0.125″ and ¼″ Elaire precision collets
Nomad 883 Pro #596 (bamboo)

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