Cnc Table Hindsight 20/20

I went the route of threaded inserts over T-track for two main reasons. First T-track is typically installed with some rather small screws to the base material and I’ve had these pull out when subjected to clamping forces. Second - in my workflows I use lots of fixtures to hold parts in specific locations/orientations and 2 sided milling so the 3x3 grid of threaded inserts gave me the ability to create the recessed bore for 1/2" dowel pins that I can put a machine screw through into the threaded insert below. Most of my designs start out with a grid of 4x0.5 holes outside of my finished workpiece on 3" centers - these become my reference and work holding for the remaining operations including if I need to flip the part for 2 sided machining. I went this route instead of continuously boring holes in random spots on the wasteboard for each project.

I used a torsion box mostly because I have mine on casters and the concrete floor isn’t flat in my shop, the torsion box keeps the setup rigid and flat. It has the added benefit of the inside making for a good shelf to keep things readily accessible for the machine.

@mhuntoon I went with t-nuts also. I wasn’t sure of the way to go with this either, but my thinking was it is a waste board after all so it’s not a decision I had to live with forever. So far they work just fine for me. I plan on using track next time just to try out a different way as I’m in learning mode.

Can anyone get me a dimension from the front left foot mount to the corner of the waste board?

@Techrise I got 1 29/32"

2 Likes

Thanks @rockytoptim. I was actually for the Y dimension. Sorry, my picture is a little deceiving.

Sorry for the wrong measurements. I remeasured and got 1 1/4"

3 Likes

Awesome @rockytoptim! I am designing my table with an removable insert and needed to find the location of the cutting envelope. Thank you.

Do you find the table sagging at all being that there aren’t any cross beams in the middle? I’m thinking of the 64x64 kreg table but not sure if that long span will cause the wood to bend under the weight of the larger cnc.

Mike,

I have the 44x64, no sagging so far (knock on wood). 3/4 ply on bottom, with 3/4 MDF on top, glued and screwed from underneath. Will most likely put a few braces in when the Journeyman arrives in a few months to ensure future proofing for sag. BTW, I decided to reverse the y rails, so I can do an enclosure without worrying about the dustboot taking up more than the 49"+Trim depth I have.

1 Like

@Bumpski I have the 48 x 64 kreg table. I haven’t seen any sagging. I have 3/4 plywood base the 3/4 mdf attached on top of that. Then the mdf wasteboard and t track on top of that.

I didn’t know you can put a brace on those tables
Thank you

Do you have pictures of your set up? I’m looking at the 44”x64” Kreg table as well

My order won’t be here until mid-September, but I have my son home from college right now, so I’m taking advantage of the help in building the table and moving things around in my workspace.

My plan is 4x4x30 legs (3 on each side), 2x4 framing (flush with top and 3-4" up from bottom on which I’ll place a shelf - likely 3/4" plywood), 48x48x3/4 MDF top (doubled up, so really 1 1/2" thick) and then 3/4" MDF spoil board which I’ll do when the machine arrives so I have exact measurements and can use it to drill out the t-nut holes every 4" in all directions.

I’m not planning to move it around, so I likely won’t get casters.

Anyone see any issues that should be addressed with the above plan? Will this be rigid enough? Should I add another 4x4 to the middle of the back? I want to leave the front wide open for access to anything underneath. Any suggestions will be greatly appreciated.

2 Likes

Ok, so I got the table put together today. Still need to attach the 2nd MDF board and bottom shelf (only the back half, similar to Brudaddy’s build).

Very anxious for the 1F to arrive, but I’m studying, reading this forum, and getting done what I can so I can hit the ground running.

Used the dado stack for the joints and connected cross pieces with pocket joints. Very excited it is all level on my garage floor in its own corner. The top is 48"x48", 4x4’s are 32" tall. Neglected to take a picture of the cross pieces, but you can sort of see it in one of the pics - the trashy looking 2x4.





3 Likes

Just wanted to share a post by @Tanukizilla. He has a lot of advice for those of us getting started. New User to Aspiring/New Users

2 Likes

Resurrecting this discussion-
What features of your table do you love (or wish you had included)?

Looking ahead, what other features should I build in to the table? Storage tray/rack for router bits? Wood storage? Slide out bottom shelf? Purpose built space for other tools? Open or enclosed base (area under the tabletop)? Dedicated storage spot for your 3-axis zero? Controller mounting spot?

Tracking strength, flat/level, stability, and size. I’m set for a very sturdy 4x8 table, with locking casters.

This is my table, ‘The Minimalist’. I already have a full woodworking shop in a single-car garage and needed to fit the CNC. I sold my drill press and then used the rest of my space as best I could.

It is quite high - 42" which was a conscious decision. It makes it easier for me to do the bit changes, secure my work, home my work surface, and so on. It is partially under some shelves so I have it on wheels and move it out slightly if I need to work on something big. You can see the accessories I’ve added. The orange shoebox is my temporary hold-down storage :slight_smile:

I am using a 7" Raspberry Pi monitor I got from Amazon. I gave up on the touch display and use a wireless mouse. As you can see, I McGivered on a shelf for it. The controller is mounted on the leg under the table with the emergency stop easily available.

7 Likes

Regarding dog holes, a guy at our Makerspace added some schedule 80 PVC blind holes and short pieces of PVC for locating holes in our makerspace CNC. Naturally, cheap AND will not trash bits that plow into them!

2 Likes

I have this on my table setup and it works great.

I am using 1/2" SCH 40.

2 Likes

Mike
I do not understand where and how you are using pvc and dog holes
Could you add a photo
Thanks so much, I used mdf for my spoil board and find that the dog holes are becoming mis shappened from clamping against them.
I was wondering if your dog holes are 3/4” deep or did you cut into the table top aswell