8/16 Big changes to x/y and motor mounts. no toppers and now use 623 and 695 flanged bearings respectively. bolt installed from top. use spacers to get good fit. Been testing for a bit and haven't noticed any bending or misalignment.
print head changed a little as well. can now remove face with belts installed. makes getting the belts even a little more tricky but I think its worth it. klicky integrated into print head mount. fan duct has minor changes. added separation between cooling fans and hotend
replaced .9 steppers with 1.8 and have my motion limits set to:
Velocity: 500
Acceleration: 50000
5/8 Minor tweaks to z stepper mounts to have a little more z rod when bed is at 0. screws should be flush when fully seated
4/21 update: increased clearance between nozzle and fan shroud
redesigned xy brackets
redesigned tensioners
updated master .step
added KlickyPCB bracket for print head and mount
probably some other minor tweaks i cant remember
I have been working on this for about a year. It has gone through 3 different versions and countless changes. I am always trying to make improvements, so there are likely to be updates along the way. The git page is a work in progress, and will be updated with some instructions and a better BOM. Maybe… I'm hoping I have provided enough photos for people to just figure most of it out.
120x120x120 Corexy. Sensorless homing on all axes. 30k Acceleration and 400mm/s max speed. Filament holder also holds 3 extra Revo nozzles. Z homes at the bottom and I have found it very consistent, once the sensitivity was dialed
The spacing of the bolts on the back/bottom of the fan shroud is the same as the accelerometer BTT sends with their PI. Just have to mount it upside down and make sure the build plate doesn't run into it.
Abridged BOM:
11x 200mm 2020 extrusions - Tap 4 on both ends and 4 on one end with m5 tap
2x 150mm 2020 extrusions - tapped on both ends
2020 corners - 3 varieties: 4x 3 way for the bottom rails on the ends. outside face for the front and anywhere else you might want to brace. and inside for supporting the rails - see pics
Uses 2x 200mm and 1x 150mm mgn7 rails.
Smooth and toothed 20t pulleys with a 3mm bore(can use just smooth).
Revo Micro hot end
2x 4010 blower fans for parts cooling and 1x 3010 for heat break. I used these because of their high rpm and CFM.
I used DIN rails to mount 150 watt PSU, PI, and SKR E3 V3.
Have to get a little creative with the fasteners to make the DIN and fan mounts work together.
2x 220-230mm ish din rails and caps. Plug mount is also a din cap and remixed from that model.
Lots of 3mm bolts and washers and heat sets
A few 5mm bolts
2mm bolts and/or tiny taping screws for mgn7's
3mm and 5mm hammerhead nuts
Some 3x5 .5mm shims for between the pulleys- can be found on amazon
Ultralight x axis rail
2x 8mmx200mm linear rods and bushings
My x and y motors are .9 degree
Dual z motors and 150mm integrated lead screws
Extruder is pancake .9 degree
Good bowden tube for bowden
Cheap and loose(lol) bowden tube for reverse bowden
2x 608 bearings
Voron V0 bed and heater
10x15 cable chain
m10 bowden connector
Nozzle brush is a cut down silicone basting brush with a taping screw buried into the center of it.
Some Notes:
A 12mm tap should help with the hot end mount but smaller layer lines and slow speed will also probably suffice. I also borked the threads on my Revo so YMMV
Slightly condensed .3mf's so may want to split some of the prints.
Main print head body/fan shroud will need organic supports
Spindle of filament management will need supports
X/Y brackets will need supports
I've put everything in what I believe to be the best orientation
All the fans should be a tight fit. Heat break fan will be held in with friction The previous version was a bit to tight and used clips that broke. This one is better
When checking belt tension, twang the belts between the 2 motors for the most accurate result. As with all Corexy printers, its important the belts be the same overall length and tension.
4/4 FIXED: Running the belts through the motor mounts is a PITA. I would welcome remixes/suggestions
New motor mount design and instructions on the git. waaaaaayyyy easier/
The author marked this model as their own original creation.