Custom ATP5 Aluminum Plate with Precision Grinding

General Discussion
1

Basic Information:

Printer Model: Ender 3 v2
MCU / Printerboard: 4.2.7
Host / SBC: Raspberry Pi 4
klippy.log

I have a general hardware question about build plates, obviously the ender 3 is a budget machine, I have spent a significant amount of time tinkering with it. My question is specificallty about the aluminiun build plate,it was nenver the best when i got the machine and over time its hot worse. their is now a bulge in the centre of the plate, Instead of implemnting workarounds to improve ir.
Has anyone triied using a Custom ATP5 Aluminum Plate with Precision Grinding

Material Required: ATP5 Cast Aluminum Tooling Plate (stress-relieved)

Dimensions:

  • Length: 235mm

  • Width: 235mm

  • Thickness: 6mm (or 8mm - please quote both options)

Flatness Specification:

  • Surface ground to ±0.05mm maximum flatness deviation across entire surface

  • This flatness tolerance is critical for the application

Machining Requirements:

  • 4 x through holes, 4.5mm diameter

  • Hole positions measured from plate edges:

    • Hole 1 (Front Left): 32.5mm from left edge, 32.5mm from front edge

    • Hole 2 (Front Right): 202.5mm from left edge, 32.5mm from front edge

    • Hole 3 (Back Right): 202.5mm from left edge, 202.5mm from front edge

    • Hole 4 (Back Left): 32.5mm from left edge, 202.5mm from front edge

Optional 5th hole (please quote with and without):

  • 1 x center hole, 4.5mm diameter

  • Position: 117.5mm from left edge, 117.5mm from front edge

Thanks

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2

How solid is the mounting of the plate to the supporting frame?
How solid is the frame?
Is there space for a slight movement in X/Y direction?

3

What are the dimensions of the bulge plate?

4

Adding that much mass to a bed slinger bed is going to FORCE you to reduce maximum print speeds.

Does this bed include a heater? Does the bed have embedded magnets or are you planning on a full bed magnet sheet? A full magnet sheet will NOT match the 0.05mm flatness of the precision ground bed.

If I were you I’d get a good sanding block and sand down the magnet on the current bed and install a new flexible build plate.

5

I would consider a new “factory” plate from Creality. I bought a similar “flat ground” plate from Precise Printer Parts… beautiful plate/quality, but it was too heavy for my Ender 3 S1 Pro (bed-slinger); print quality got worse. So I reinstalled the factory bed plate along with linear rails, and it works great….. Just my experience.

6

You can just use aluminium or Kapton tape to level your bed.
If the flatness of aluminium itself is the issue.

Aluminium beds tend to warp because they may have no space for thermal expansion, but I’m not sure there is a simple solution for that or that think bed would magically solve the issue that it is fixed in 4 or 5 points.

Hope that helps.