I took the plunge and ordered a 2x4 AVID Pro machine but intend to build a table for the time being.
A couple of questions for all the experienced folks:
1) I thought vertical routing might be good for joinery work and the ability to rout edges--but is it really?
2) On the AVID machine, would it be a bad idea to slide the front cross-member back about 1.5 inches from the edge when building the table frame? It doesn't look like that would interfere with anything on the side rails.
Since the work area already extends about 1 inch beyond the front edge, moving the cross-member back would allow mounting a vertical spoil board with 1-2 inches of y-motion for routing. I don't think it would diminish capability of horizontal routing either (?)
I was concerned that moving the front cross-member could interfere with gantry operation, affect rigidity, or wasn't even possible for some reason. Just looking for confirmation before starting to build a table to include vertical capability at the front edge. Of course, I have 10-12 weeks to sort this out
Check out Frank Howarth's video on doing the drop table on his CNC. Of course, his is huge and he has plenty of room but he uses his often.
My CNC is a welded steel frame so I don't have the option of moving a cross member but my spindle comes out almost 2" past the front cross member and I made the entire section of spoilboard removable between the first and second cross members if I want to stand something up and machine the end.
I wrote some software for creating g-code for dovetails and box joints, and IMO it's far superior to a router table or jig.
When cutting dovetails on a jig, you're options are very limited.
On the CNC, you can cut an infinite variety of joints, as depth and spacing are unlimited.
And if you have a vertical fixture on your machine, there's virtually zero setup time.
You can have your joints finished before you can even get your jig setup and ready to use.
Ger, good to hear that-- seemed that it could be easier. Was thinking it possible to have some parameterized CAD (g-code?) for dovetail, box joint, mortise+tenon that could be loaded up on-demand and run. I'm a total newbie and maybe that's what you did.
Mike,
Thanks, that's the idea! Since I plan to build my base, I wanted to mount the vertical table at the very front between the ends of the rails by shifting the cross-member back a couple inches. Seems it would be easier to use instead of leaning over the rail--and I'm a bit vertically challenged
Oh, and there are no problems with setting the front rail back a few inches. If you are using an Avid leg set, you will want to set the front legs back, so they line up with your front crossmember. If your making your own stand, you will want your front cross support under the front cross rail.
Thanks Gary -- some great info in that thread. Planning to look into JointCAM.
If I follow correctly, it looks like your fixture sits at the very front of the AVID table and you did not need to set the front rail back to provide enough y-axis for vertical work?
Not quite right. I set my front crossmember and spoilboard back to ensure I had enough clearance. However, you are correct that my fixture sits on the very front of my spoilboard. Finally, mine is not an "AVID table." I used some parts from Avid, but my design doesn't much resemble Avid's. We have 80/20 extrusions in common but most of the extrusions I used are twice the cross sectional size and more than twice as heavy (I used the heavyweight extrusions; Avid uses the lighter weight ones). My machine is still evolving, but I had a setback. Unfortunately, an otherwise unremarkable fall tore the left leg patellar tendon loose from my knee cap. The subsequent surgery and months of physical therapy has kept me out of the shop for several months. I'm just getting back to it.
Make sure the spindle can reach at least 1-2" past the outside of the vertically mounted workpiece. You need some room for the tool to clear, and for entry and exit moves.
Hi Rick,
Did you ever figure this out and make it work? I am thinking about buying the Avid desktop pro 2x3. I love the Avid machine but I might get a Stepcraft because they enable and sell a vertical surface. If you did figure it out would you please share what you did? Photos?
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