Smart Effector issue

[tecno]

Running G29 I get sporadic triggers with no Z moving, is there a way to adjust the sensitivity?
Triggers at H height

Any suggestions?

[achrn]

@tecno https://duet3d.dozuki.com/Wiki/Smart_effector_and_carriage_adapters_for_delta_printer#Section_Programming_the_sensitivity

However, if it's triggering with no movement, I'm not sure that setting sensitivity is the issue, since that would imply it's triggering with no mechanical input.

[tecno]

I get no reaction to M672 command.

Power up 2 flashes.

Probe input on SKRV1.4T (3 wires)

[Phaedrux]

How are you running G29 without movement?

Here is some more detail on using M672 https://docs.duet3d.com/en/User_manual/Reference/Gcodes#m672-program-z-probe

[dc42]

@tecno said in Smart Effector issue:

I get no reaction to M672 command.

Power up 2 flashes.

Probe input on SKRV1.4T (3 wires)

M672 only works if there is also a command signal from the board to the Smart Effector, i.e. 4 wires.

[tecno]

@dc42

Fixed 4 wires
M672 S131:131 works OK with 5 flashes. Boot up 2 flashes

But if I try M672 S105:070:255 = nothing Invalid Z probe index

[gloomyandy]

@tecno said in Smart Effector issue:

M672 S105:070:255
That does not look like a valid command to me. See:

To program the sensor, send command M672 S105:aaa:bbb replacing aaa by the desired sensitivity and bbb by 255 - aaa. The green LED will flash 4 times if the command is accepted. When you subsequently power up the effector, the green LED will flash three times instead of twice to indicate that a custom sensitivity is being used.

So the 3rd value needs to be 255 minus the second value. In this case 255-70 = 185. What happens if you send: M672 S105:070:185?

[tecno]

@gloomyandy

[tecno]

I get no where with this M672 sensitivity setting. Tried both P5 and P8 and up to 50:205 and I get sporadic jump overs.
Can this be my step setting?
M350 X16 Y16 Z16 E16 I1 ; configure microstepping with interpolation
M92 X80.00 Y80.00 Z80.00 E80.00

[dc42]

@tecno said in Smart Effector issue:

Running G29 I get sporadic triggers with no Z moving, is there a way to adjust the sensitivity?
Triggers at H height

Is it triggering when the machine is idle, not moving?

If so, does it make a difference whether the hot end fan and/or print cooling fan are running?

[tecno]

@dc42
No fans active - no magnets on effector

G29 and tiggers on point where it should go down.

Tried now with higher µsteps
M92 X80.00 Y80.00 Z80.00 E80.00 ; set steps per mm
M350 X256 Y256 Z256 E16 I1 ; configure microstepping with interpolation

This gives much better result, but I think I need to adjust belts that sound to be cogging.

[tecno]

Still sporadic trigging, need some rest to clear my head.

I noticed following. when homed and issuing G29 I can observe several triggs with LED flickering.
This even with 55:200.

Also I can see push-down of bed position from 12 to 4 in outer positions.

Something is fishy for sure.

[dc42]

@tecno please answer the first question in my previous post. Also tell us what M558 command you are using.

[tecno]

@dc42 said in Smart Effector issue:

@tecno please answer the first question in my previous post. Also tell us what M558 command you are using.

M558 P8 R0.4 C"probe+servo0" H15 F800 T1500

G29 and tiggers on point where it should go down. Idle = NO

[rjenkinsgb]

@tecno What do you have in the probe G31 line?

[tecno]

@rjenkinsgb

G31 P180 X0 Y0 Z-0.72

[tecno]

https://youtu.be/6YHxmoWgLI8

M672 S131:131
1/16th µstep Back to 'normal'

[rjenkinsgb]

@tecno OK; the Z-0.72 reminds me of the smart effector I got that was faulty...

The other one is incredibly sensitive, I initially set it at -0.1 but to get a correct first layer it seems better at Z0.0 !
That's with all default settings.

DC42 is the authority on that, though; I'm just another Duet user.

[dc42]

@tecno said in Smart Effector issue:

@dc42 said in Smart Effector issue:

@tecno please answer the first question in my previous post. Also tell us what M558 command you are using.

M558 P8 R0.4 C"probe+servo0" H15 F800 T1500

G29 and tiggers on point where it should go down. Idle = NO

Try reducing the probing Z acceleration, using M201.1 if you are running 3.4.0RC firmware, or M201 if not. High Z acceleration combined with a high mass hot end create the same strain in the effector at the start of the probing move as nozzle contact does.

[tecno]

@dc42
M201 X1000.00 Y1000.00 Z400.00 E1000.00

Slightly worse = more jump over points