Giá đỡ lắp đặt đồng hồ đo cho máy in Ender-5 S1

This is a bracket for the dial test indicator that screws to the right side of the standard extruder of Ender-5 S1 printer.

It allows to run the test indicator against a known square block (1-2-3 block, machinist square, etc) to check that X/Y axes are perpendicular.

The bracket mounts with two M3x6 screws. To clamp the indicator, I used M3x10 screw and M3*H3 threaded insert.

Printing

Printing should not require any supports or any special settings. Print top side down.

Alignment Process

I used the following alignment process. All motors were disengaged at this point, and I moved the gantry by hands.

1. Put a machinist square directly on the magnetic surface.
2. Put an indicator in the bracket, mount the bracket to the extruder. Make the indicator to face to the right.
3. Run the indicator along the long edge of the square. Tap the square such that indicator doesn't move when running against the square. Ideally, there should be no movement in the indicator.
4. Turn the indicator to face forward.
5. Run the indicator across the front edge of the square.
6. See if any adjustment is needed. If indicator doesn't move or moves very slightly, X/Y axes are reasonably perpendicular, and no adjustment is needed.
7. If not, release the coupling of the Y axis (on the Ender-5 S1, it's the coupler at the back that connects the Y stepper motor to the shaft going left), move the left and the right carriages as necessary (for example, move the left carriage forward and the right carriage back), tighten the coupler. Probably, would help to have a third hand, so you can hold the carriages with both hands and someone else can tighten the coupler.
8. Re-check the alignment.

Probably, would not hurt to check that the frame is square. However, if both sides of the frame are parallel to each other, this process would make the gantry to be perpendicular to them even if the frame itself is skewed.

The might be some other considerations as to in which order to adjust everything (the wheels, the belts, the coupler). I don't have experience aligning 3D printers, I only adjusted the coupler.

It is possible to run the gantry under the power, but make sure to install the bracket AFTER homing the motors. The bracket interferes with X axis homing and you can damage your printer if you home with the bracket installed.

After doing the alignment, I re-checked it by running some G-code to move the extruder. Moving by hand during the alignment process might move gantry slightly differently when running under the power, so probably a good idea to check with the motors running at the very end.

NOTE: Once again, the bracket interferes with X axis homing!