[BUG] Optical endstops not working on MKS Tinybee

[theyeetmaster992]

Did you test the latest bugfix-2.1.x code?

Yes, and the problem still exists.

Bug Description

Optical endstops not working/being picked up by marlin on MKS Tinybee. Tried swapping cables and individual wires, still not working. Could be config issue or issue on another file like pins(not sure honestly)

Bug Timeline

No response

Expected behavior

Expected optical endstops to work like on the old motherboard. Will show red light when working.

Actual behavior

end stops don't trigger and machine grinds

Steps to Reproduce

No response

Version of Marlin Firmware

2.1.x bugfix

Printer model

Velleman Vertex K8400

Electronics

board upgrade

LCD/Controller

No response

Other add-ons

No response

Bed Leveling

None

Your Slicer

None

Host Software

None

Don't forget to include

• A ZIP file containing your Configuration.h and Configuration_adv.h.

Additional information & file uploads

Marlin (3).zip

[ellensp]

mechanical and optical endstops both work the same way as far as the controller is concerned.

The endstop sends a high or a low depending on is current state.

You just tell marlin if it is triggered high or low.

Any other differences are electrical.

measure the voltage on the signal pin, doess it change when you sick a piece of cardboard the slot?

Also note that most 3d printed plastics are IR transparent, ie you cannot interrupt an optical endstop with them.

[theyeetmaster992]

I will check it when i have more time. Parts are injection molded abs plastic/solid.