BTT Octobus max 1.0

[McCosch]

 

Hello,

I have a BTT octobus max 1.0 and the problem is that I can't activate the end stop. I can enter it in the print.cfg to open or close it but that has no effect on the switch on the X-Y axis. Maybe someone knows what the cause is.

 

[mvdveer]

17 minutes ago, McCosch said:

Maybe someone knows what the cause is.

I suspect a connection issue as per your diagram. Pin definitions as per the diagram are: Pin, GND, 5V. You have connected 5V to pin and pin to 5Von MIN1. Pin is correctly connected on Min2. (That is assuming red = 5V, Black = GND and Blue and Yellow are pin connections)

Swap 5V and Pin connections on Min1

[McCosch]

Hello,
Thanks for the quick reply. Now I have swapped the GND (SW) with the X cable (R) but that would be wrong because on the motherboard the order would be PF0(GND)-G(X)-5V and next to it PF2-G(Y)-5V. I am sending an excerpt in the printer.cfg.

 

# Motor-1

[stepper_x]

step_pin: PC13

dir_pin: PC14

enable_pin: !PE6

microsteps: 16

rotation_distance: 40

endstop_pin: PF0

position_endstop: 0

position_max: 200

homing_speed: 50

 

# Motor-2

[stepper_y]

step_pin: PE4

dir_pin: PE5

enable_pin: !PE3

microsteps: 16

rotation_distance: 40

endstop_pin: PF2

position_endstop: 0

position_max: 200

homing_speed: 50

 

[Crashdown]

Your first picture looks like the correct wiring. 

The pins on the XY endstop PCB are Gnd, X, Y, Vin  ... Black Gnd, Red X, Yellow Y, Blue Vin 

On the motherboard side with the twin 3pin plugs you need from right to left in your last picture Red, black, blue, next plug first pin yellow

Or, in your last picture swap red and black and move the yellow wire one pin right

Or, I think more commonly its red, empty, blue on first plug and yellow, black, empty on the second plug 

I have never had good results with these hall effect enstops though. The normal switch endstops are better. From memory, if I'm not mistaken, the hall effect endstops are not ment to be an upgrade or a better solution than switches, they were designed to get around a problem with a much earlier revision of Voron printers though I have no clue what that might have been. I could be completely mistaken though.

They need to be calibrated with the small potentiometers on the endstop pcb and in my experience a high proportion of the ones shipped either don't work at all, or don't work as they are supposed to.

 

Edited February 16 by Crashdown

[McCosch]

I used a different motherboard (btt octopus v1.1) and it worked straight away. I have no idea what it could be. I'll try it again with normal switches and try it one last time.

[Miamijerry]

Check the wires are the same as these, which are working. You can find what each pin is intended to be by looking at the back of the MAX EZ

 

Edited February 16 by Miamijerry

[McCosch]

I have already checked several times.

[Miamijerry]

If you are using Klipper, you can run QUERY_ENDSTOPS and when the signal wire is grounded the open/closed state of the switch should change. QUERY_ENDSTOPS is not live, you need to run it again each time you change the state of the switch

[McCosch]

Thanks, I'll try it.

[Bugalaws]

21 hours ago, McCosch said:

Hello,

I have a BTT octobus max 1.0 and the problem is that I can't activate the end stop. I can enter it in the print.cfg to open or close it but that has no effect on the switch on the X-Y axis. Maybe someone knows what the cause is.

You not are with the jumper in DIAG pins? I had problem… when i webt check… i see what i forgot to remove the jumper what i put before to try use the sensorless …

[McCosch]

BUGALAWS.....Thank you very much for this tip. That was the problem, I removed the jumper and now it works. Thank you very much. I hope that I can ask more questions if I have problems, but only if you don't mind.

[Bugalaws]

On 2/16/2025 at 11:44 PM, McCosch said:

BUGALAWS.....Thank you very much for this tip. That was the problem, I removed the jumper and now it works. Thank you very much. I hope that I can ask more questions if I have problems, but only if you don't mind.

If you have doubts let me know, its a pleasure hellp you

[McCosch]

 

I'm very happy. I'll first put the printer back together and get it running, then I'll need help installing the BIGTREETECH ERCF control board MMB CAN V1.0

I've already tried it but failed.