Update: 3/12/19 (Uploaded Version 2 - No supports!)
I've updated the design of the alignment "key" on the heel of of the arm, so when the arm is placed properly on the build surface (flat side down) the overhang angle of the key is now steep enough to print on any printer without needing any support, making the entire thing printable without support material! I've also added small "L" or "R" to all parts in order to help mate the back plates with it's proper arm. Enjoy!
Update: 3/9/19 (Designer note)
If you print this design, all I ask for in return is to please leave a comment or feedback!
Please.. print! comment! and have fun! THANK YOU! -JSM
ALL UPDATES ARE ABOVE THIS LINE -- ORIGINAL "THING" DETAIL BEGINS BELOW
The "Super Strut" - A bed support attachment for Creality Ender 5 printers.
These struts are designed to support the cantilever bed on a Creality Ender 5, which tends to "bounce" due to a lack of support from the factory.
They are designed to clamp onto the Z-axis linear bearing nuts, using (4) M4 x 20mm Bolt/Nuts (per side).
The end of the strut is simply pressed, firmly onto the inner edge of the aluminum plate which the heated bed is mounted onto (not the heated bed itself).
I've designed the struts with strength and support in mind, so they would be strong, and give the bed as much support as possible.
Unlike another design I've seen, these are designed with an "offset", so they align with the bed, and don't need to be cocked inwards in order to be installed and the ends clamp firmly onto the bed frame at clean, right angles.
I've also designed these struts to be printed without supports, and the orientation which you place them in your slicer is very important! View the screenshot (with the parts rendered in orange) to see the correct orientation.
While supports are not required, you may add supports (touching bed only) if you are concerned about the low overhang angle of the alignment-key located on the "heel" of the strut itself (where it mates up with the back-plate).
Some technical notes:
The Ender 5 is a GREAT printer, but I believe that in the quest to reduce the printers cost, Creality had to make certain design decisions, some of which, have had the unfortunate effect of reducing the printers capability and/or print quality.
The lack of adequate support of the printers bed (especially the very "end" or tip of the cantilever) is probably the one design decision with the greatest impact on achievable print quality, especially at higher speeds where rapid changes in the inertial mass of the X axis gantry (moving along the Y axis) are transfered into the print by the resulting "springing" action of the front of the bed.
These struts were designed, printed using PETG, and were tested using an accelerometer to come up with the best possible design to greatly reduce this problem, without reducing the printer's capabilities or restricting the desired movement of the bed in any way. When installed, they do not inhibit the functionality of the printer, or restrict access to the bed's adjustment knobs, and the print bed is allowed to move all the way down without the struts making contact with any part of the power supply or the printers frame in any way.
This is the first version of this design, and I've printed and tested several sets of them to ensure they print nicely, install easily, and more importantly.. that they provide much needed support by limiting unwanted movement, flexing, and vibration of the print bed.
I welcome feedback / design comments, suggestions, or questions!
I hope you enjoy the design.. Thanks!