Duet 2 wifi Z-probe and Z ednstop min at the same time
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Hi,
I have big problem with my original BLTouch Smart v3.1. The probe is randomly not trrigered while homing and my bed is crashing into nozzle. Offten this happens after completed print when i try to print something else in a row. But anyway, i want to add simple microswitch at the Z axis to prevent crashing bed against nozzle and i can't config it properly. Is it any possible way to have both "endstops" at the same time? I wired microswitch to the Zendstop on board and added M574 Z1 S1 P"zstop" after M574 Z1 S2. I'm using RRF 3.3 -
If you have not upgraded to firmware 3.3 considering doing so.
Yes you can have a Z endstop and a Z probe.
When using a G1 H1 Znnn command the Z endstop will be used.
When using a G30 command the Z probe will be used.
Specify the Z endstop in a M574 command as you would for any other endstop.
The M574 Z1 S2 command serves no purpose even without an actual Z endstop so remove it.
Frederick
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@fcwilt So yea i upgraded to 3.3 firmware today. I will remove m574 z1 s2 command. But can i use while homing z-probe and for safety endstop at the same time? should i make some g-code changes in home command?
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Ideally you should determine why the probe isn't triggering. Could be a bad white wire connection.
It is also a good idea to reduce the motor current during homing using M913 so that if there is a crash, it can't do damage and the motor will stall instead.
Lastly, you cannot use the probe AND an endstop in the same move. As described by @fcwilt it depends on how the move was initiated whether the probe or endstop is used. You could configure the endstop to act as an emergency stop trigger in case of a crash, but that would mean the whole printer shuts down. Reducing the current and making the probe reliable might be the better way.
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@hesus29 said in Duet 2 wifi Z-probe and Z ednstop min at the same time:
@fcwilt So yea i upgraded to 3.3 firmware today. I will remove m574 z1 s2 command. But can i use while homing z-probe and for safety endstop at the same time? should i make some g-code changes in home command?
Hi,
I always equip my printers with Z endstops and Z probes.
I always home with the Z endstop. It is quicker and simpler than using the Z probe. And since you can home Z first you don't need to have any Z moves in the X and Y homing if you don't want to.
I use the Z probe for:
- setting the Z=0 datum
- leveling the bed
- creating the mech compensation height map
