I made a few adjustments to the design.
- The 30mm Fan is now fits between 2 parrallel rods.
- Chamfered the inside edge to give a little more clearance on hotend
- Added Eject holes for the nuttraps in base in case they are stuck when trying to take them out.
- Took out theNuttrap at top and use M3x22mm screw to a locknut on the back.
- Changed my default Nuttrap 6.4mm
- Added wiretie cylinders to each side of front of hotend. If you have the cube hotend portion pointing away from fan, the wires should go half way between these on one side or the other.
- I made the Nuttrap test prints a lot smaller.
This effector has a 25mm radius and is designed for an arm width of 40mm. It also uses the E3D Lite6 with the 30mm fan that comes with it. My main objective was to mount the hotend higher than the rod connections. I measure about 340mm height at the center of the bed. My firmware was set to 299 height before. I started looking a couple of other designs to add a print cooler fan, but have opted to make it as simple as possible to start with. I am not using a bed leveling sensor. I was also going to change to a 40mm fan, but the 30mm fan works in this design so kept it at that. I started out using https://www.thingiverse.com/thing:1456635 as a guide and was able to copy the design into openscad, but then only used his idea of the rounded base plate. I might look at adding the print cooler channel later. I first used a hexagon shape for the base, but the circular shape gave me a little better clearance around most of the cube shaped hotend portion.
The hardware I used was:
2 - M3x22mm Stainless Socket Head Cap Screws with locknuts to hold Bracket on
(Originally used M3x16 when I was using Nut Traps at top)
6 - M3x22mm Stainless Socket Head Cap Screws with Locknuts for the Rods
This design uses M3 Nuttraps for the rod connections & the bracket mount. The hole size for the M3 Nutlocks is probably the only thing you might want to adjust. I used 6.4mm which is 5.54mm width across the flat part of the nut. You can change the variable M3Nut in the openscad to adjust this, then set the variable DisplayPart = 4 to create a new test print.
The order in which I installed this was attaching the 6 rods to the effector first. Leave the fan off the hotend & install just the hotend & mount the bracket to hold the hotend in place. I rotated the hotend so the wires will come out the opposite end of the fan. You can then use a wire tie thru those 2 hole mounts on either side of the Hotend mount. I put them on both sides in case your wires do not come out the same direction as mine. There is a sequence of pictures that shows how I installed this.
The bracket could be a little thinner, but I was initially making that mount go almost to the Base Plate when trying 4010 fans & keeping the air flow more directed at the heatsink and it does look a little cooler than just a simple cube shape bracket. Using the clipon fan bracket I did not really need to do that.
I included the openscad source files, STL files and 4 test files for different Nut trap sizes. The effector & bracket were created with
M3Nut = 6.4; //M3 Nut Diameter 6.5mm = 5.54mm across flats
I created 2 versions of the Effector tower, one with Supports. The supports worked well for me & pulled right off. (EffectorTower_WithSupports_3010_Rev40.stl) & one without (EffectorTower_3010_Rev40.stl).
I have printed these using eSun Silver PLA+, but will change to PETG if the plastic starts melting around the hotend.
I printed the EffectorTower_WithSupports_3010_Rev40.stl at 30% infill and variable layer heights with the Prusa Slicer. This came out to .71oz and print time of 2:52:21. The support weighed .048oz
0 - 14.55 .2mm
14.55 - 32.55 .3mm
32.55 - 50.75 .2mm
The EffectorTowerBracket_3010_Rev40.stl, I printed at 30% infill and .2mm layer height & this came out to .18oz & 0:29:55 print time.