I’ve been plugging away at my own attempt at an improved Z-Axis for awhile now and I think I have a version of it which I’m happy with. I figure I’d show this to all of you that are much smarter than me (so, everyone on this forum) in case there are oversights I’ve made. That way, we can catch them before I try putting this all together and go “wait a minute…”
Here’s the current iteration:
I highly recommend looking at this link to the model (available on the Fusion360 cloud) to get a better idea of how everything fits together:
I’m planning on using 3/4" baltic birch for most of the components. Pretty much everything is tab and slotted together to locate my parts accurately. I plan of glue-and-screwing the parts together. You can actually see my pilot holes in the model. I will be transferring my 1/4" HDPE pad from my current test sled to this “final” sled.
The dust hood components I’m planning on 3D printing. The main part of the hood will use most of my print bed. If I have too much trouble with the printer, I’m thinking I might also be able to machine it from 3/4" baltic birch or maybe even acrylic. There is also a “window” that I will make from clear acrylic.
The Z-Axis lead screw and rails are from the kit @StephenMcG used for his sled. For the time being I’m still planning on using the Rigid R2900 (almost the same one as the recommended one) I’ve been using so far. I may look into equipping this sled with a more powerful CNC spindle down the road.
The only thing not modeled are the weights. Even though I went through all the effort of modeling this, I haven’t used Fusion’s materials to estimate the weight of all the plywood. I think I’ll just wait until I have it assembled, then add my steel weights to the sled until it reaches my target weight, ~30-40 lbs.
I am thinking I might make a proper final version from machined aluminum somewhere down the line (maybe when I get a new spindle?)
Community Garden link: