Mini Kossel Magnetic Arm Carriage

thingiverse

Hi all, I bought some magnetic arms for my Mini-Kossel from Ultibots. I have upgraded the parts to use a lot of different kinds of balls and setups. Check out the history below. http://www.ultibots.com/magball-arms-balls-215mm/ Their carriage design didn't work for the linear slides I've got, so I made my own. I use standard 400mm slides - or whatever can be called "standard" on a RepRap printer! I used 100% infill. I know this is ridiculous for most parts, but the strength of crucial components is vital. The forces on the part are constantly shifting, and print quality heavily depends on stiffness. Having trouble with this part? Send me an email, and I'll do my best to help. All four screws are M3 x 16mm, which is McMaster Carr's part number 92095A184. Updated: May 20th 2018 Once more, another ball spacing! Now we have 55mm! Updated: August 4th, 2017 Added a new version using 10mm M4 Tapped ball bearings that you usually find on eBay. Updated: December 1st, 2016 Added step files for each model. Updated: September 14th, 2006 With this design, your build plate radius will decrease by about 20mm in every axis. To correct the problem, a new carriage design was introduced - you can find it here: http://www.thingiverse.com/thing:1769818. Updated: May 6th, 2016 Added a hole to insert an M3 screw for end-stop adjustment at the top. It's sized for an M3 tap. Drill out with a 2.5mm drill bit first and then tap by hand. Use caution not to cut or melt the plastic! Also, I added a new ball spacing - now we have 40, 43, and 45mm! Updated: February 14th, 2016 Added files for using a 9.5mm (3/8 in) ball bearing with a tapped hole for an M3 screw. Both have a 43mm ball spacing and now both types of ball studs are available - the ones from Ultibots and those with an M3 tapped hole. Updated: February 13th, 2016 Added the same part but with 45mm ball spacing! Improved: The strength of this part has improved due to the better geometry. Distance between the centers was reduced to 43mm. Also, belt fit and insertion force when assembling were both enhanced. Print Settings - Printer Brand: RepRap - Printer Model: Mini-Kossel - Raft Type: No rafts used. - Support Material: No supports needed. - Layer Resolution: At least 0.2 mm (and even better). - Infill Density: 100%