I still have to figure out how to hold on the workpiece a little bit better. The final layer becomes a bit of a problem when it cuts through. The Proxxon tool is nice and quiet — but Im beginning to want more power. EPVC ( Expanded PVC ) is super easy to mill — I run at the speed I do because the proxxon begins to complain at higher speeds. at 16mm/s, the tool is noticeably loaded. A little faster, and the tool stalls. I think EPVC can mill at a much faster speed than I’ve done it at. And it’s super cheap! I always find scrap pieces at my local TAP plastics — I bought a bunch of different plastics for experimentation. So far, I like EPVC and HDPE — they mill wonderfully. I hear Delrin mills well, but there’s no local supplier that can sell me the small sheets I want. Getting a large sheet and cutting it down is a pain — though I may do it as an experiment in the future.
I’ve ordered a remanufactured ER11 spindle, complete with motor, from China. I don’t think I’ll make that a standard part for EasyMaker — it’s just too expensive to get them new.
The part above is a design change for the printing mode of EM. The final part will be made of HDPE and much thinner. This part was a test of holding down the workpiece with two pieces of carpet tape. I have to find a better way to hold down a work-piece when milling all the way through. When the final layer gets cut, there’s no support anymore.
Oh well, off to work. Thanks all!