4 Attachment(s)
Seeking design feedback before I start
I truly value the experiences, expertise and viewpoints offered by so many members of the site, so I'd like to ask for some feedback on a working design before I get into the build.
For reference, the tube on the table is 1", the table itself is about 48"x44" and the gantry is just over 48" wide (which makes sense if the table is 44"). The Y and Z axis will use a new bearing system I'm working with - it uses hex rails and roller bearings, instead of tube. I like it because it increases the bearing contact area, and by orienting the hex correctly, makes for easy surface drilling, and should be quite stable (kind of like a larger V-groove setup). As for the three stepper motors on the front...I haven't decided if I can get away with one in the middle or not. It seemed to work well for Joe, Andy (Lionclaw), and others.
I welcome ALL feedback, and if anyone would like additional images or clarifications, just ask!
- Shawn
7 Attachment(s)
Finally some progress to report...
I figured it was time to share some progress with the community. Its been a busy summer so far what with the regular job, the gym, volleyball, DJing, girlfriend (they seem to consume a lot of time) and various other activities. Somehow I still managed to get some work done. Take a look:
There's a few shots of my gantry, some of it anyway. I've gotten more done since those shots were taken.
Next are the ribs for my table. I used the jig in the other pictures to cut the slots. The jig is 1/2" MDF, and has a clamp (left) to hold the ribs, a slot for the router bit, a stop to position the ribs (right), a guide on the bottom and two screws on the back. The guide slides in the groove on the base until the screws hit the back wall of the groove. So I can basically adjust the lenght of the slots by turning the screws in or out. Since my ribs are 4" wide, I set it so the bit centre cuts just shy of 2".
From the picture of my table skeleton, you can see that there are quite a few slots cut into those pieces! (6*11*2 = 132 for those who aren't counting) It all fits together pertty well. I think you can also see the T-nuts on the long outside ribs - thats where I'll be bolting my rails to. I've since also added 2 pieces of 1/4"-20 threaded rod running through the table. It'll make it easier to glue up, but I haven't decided if I'll leave them in yet. (Before I get any questions, its 60.25" x 32.125")
- Shawn