TAP with EBB36 over CANBus

General Discussion
1

Basic Information:

Printer Model: Voron 2.4 R2
MCU / Printerboard: Octopus 1.1
Host / SBC Raspberry PI
klippy.log (3.3 MB)

klippy.log

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Describe your issue:

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Getting closer to that first Voron Benchy. Sensorless homing is now working for X and Y axis.

Now for Z. I have TAP installed on the Stealthburner toolhead connected to an EBB36 with CANBus. So I understand that TAP will be the Z endstop. The indicator on the TAP is blue when at rest and red when I lift it. However, klipper doesent indicate a change in endstop status when I manually trigger it. Also, if I home all, the Z axis moves up until it hits the upper limit. It seems it should be moving down to trigger the TAP.

I haven’t been able to find an article that addresses configuring TAP with CANBuss. Any help is greatly appreciated.

2

Tap is a probe, not an endstop. You need to run QUERY_PROBE while holding Tap up to see if the status changes.

If the head is moving up instead of down, then you likely need to invert the direction pin on all of your Z steppers.

3

I would also suggest changing the y_offset in your probe section to 0.

4

Thank you for your response.

I get that it’s a probe, but I read somewhere that it acts as the Z endstop. Perhaps that was bad information.

Rookie mistake here. I had the wrong pin defined for the TAP. Changed that and Klipper recognizes the change in state.

So the Z steppers alternate between the direction pins being inverted or not. So to reverse travel, reverse the pattern?

5

Yes, invert all 4 from what they are to the opposite.

6

Reversed the pattern and now the Z axis moves in the right direction homing and stops when the tap touches the print bed.

Getting there.

Thanks!

1 Like
7

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