UPDATE (2023-09-13): Uploaded an improved version (v6.0)

• Larger surface area for the platform
• More robust design for the bolt retaining scheme
• Easier assembly
• Adjustment range : 12~16.5mm (1mm taller)

Original Summary:
A totally unnecessary remix of Av8er's Low Profile Adjustable Bed Wedge and dfrechette's Wedge Jack.

I made it 2 mm taller than Av8er's model so that I can use it for my Anycubic Mega Pro's Ultrabase heated bed which sags in the middle for some reason. The modded frame provides a range of 11~15.5mm.

I also incorporated dfrechette's idea for guiding grooves for the wedges so the assembled model would be held together. The roof concept, however, would have added too much height for my needs, so I added a dovetail feature on each wedge so the upper and lower wedges are held together, preventing the upper wedge from falling off without a roof.

Finally, the upper wedge struts over the frame so it would hold the bolt in place.

Anycubic

All-metal Mega

No

No

0.4

25%

• If this is to be used to jack up a heat bed, be sure to use appropriate heat-resistant material (no PLA).
• If printing with brittle material like ABS, be careful when inserting a nut as the print might crack if too forceful.
• Higher resolution results in better sliding surfaces although 0.4mm-resolution would still print workable parts.

• 1 x M3-30 bolt
• 1 x M3 nut

Ver 6.0:

1. Insert an M3 nut in the lower wedge
2. Insert an M3-30 bolt through the bolt retaining block piece
3. Slide the lower wedge into the upper wedge aligning the dovetails
4. Screw in the bolt from Step 2 into the lower wedge from Step 3 until the bolt retaining piece and the upper wedge are almost touching each other (do not tighten)
5. Insert the assembly from Step 4 into the base frame properly aligning all pieces, then push them into place tightly with fingers.

Original:

1. Insert an M3 nut in the lower wedge
2. Insert an M3-30 bolt through the hole on the frame wall
3. Place the upper wedge on the frame strutting over the wall and the screw
4. Pushing slightly down on the tapered end of the upper wedge, slide the lower wedge into the upper wedge aligning the dovetails while simultaneously inserting it into the frame aligning the guide grooves at the bottom. Push the lower wedge in until the bolt makes contact with the nut.
5. Turn the bolt clockwise to pull in the lower wedge to raise the upper wedge. Counterclockwise to lower the upper wedge.