First total DIY no kit involved printer build coming along, calling it the ‘MiltyKoss’, definitely a WIP still. Hope to be running some calibration in a few days… The corners will eventually be covered with stylish curved panels, mounted on the frame screws outside the main frame securing thumb nuts. Endstop mount was a quick design check it will probably move to a different position (and get the right sized screws!).
It looks pretty cool! I love the bottom brackets that the stepper motors are installed in.
@Justin_Nesselrotte agreed. I like how far back the aluminum base rods go. That’s how I have mine. Did you bolt a screw on the end of those?
I think you might have good luck selling that machine as a kit.
I see some interesting carriages there, are they running on PTFE rods on the aluminium profiles ? Can you post some close-up pictures?
@Romeo_Pavel Yep ;0) they sure are. I’m using Delrin as it has higher durometer, I was worried about the softness of PTFE so I went with harder Delrin for the first test units, but I want to try PTFE for the lower friction. If the rod material compress too much the added surface area will negate low friction benefits and could add stiction on specific arm movements as the bushing compress and ad surface area friction. For bushings my current thinking is that hardness to keep specific contact is important, but so is coefficient of friction… I just am not sure till I test them more with more materials. I will be posting them on thingiverse in the next few days now that I have the printer in calibration and can see they work OK. Not sure they are better or worse than wheels, rails add a whole level of stiffness to the machine so they can’t compete with those. But they have zero backlash with good tuning of the tension while being very low friction, and cost about $1 each for the filament and a suitable 1/4" rod. So they have their own economic niche of 'Open Source and basicly free, just add a little elbow grease and enthusiasm :o) ’