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@dc42 said in v2.0 consistently increasing probe heights:

@oarjjj gave you verified that all the boards are now running 3.6.0-beta.1 ?

Any other ideas?

@Phaedrux
The documentation of the Smart Effector says:
The version 2 and later Smart Effectors perform an additional self-test at power up to check that the strain gauge output is within the expected range. This test may fail during the first few seconds after power up as the voltages settle, so it is repeated until it passes. Therefore, if your sensor flashes 6 or 7 times once or twice before it flashes twice, this is normal. However, if it continues to flash 6 or more times, the sensor is faulty:

7 flashes - strain gauge output out of tolerance (too high)

It is an old sensor, I bought it with a second hand non working delta printer. Don't know its life history or age.

I measured the voltage drop across each resistor and found one that had much more across it than all the others. When I tried to redo the solder joints the resistor split in two parts. Replaced with a new smaller (1206) 100 Ohm resistor. This will not be strain sensitive. Replacing another resistor in the same way.

The sensor works now, probably with reduced sensitivity, Flashes twice at startup.

I have no photos since I didn't know about the crack until I resoldered the resistor.
The crack was not visible under amagnifying glass.

If it happens again I think I will try to glue six real strain sensors to the board as a better fix.

@gorf32 is the problem when the hot end is hot, or when the hot end heater is actually 'on' (ie heating)? If you try probing with the M558 B parameter set to B1, does that help? If it does, I expect the heater PWM is causing interference. If not, I would think that the heat is causing the Smart Effector PCB to expand, so changing the reading; try adjusting the sensitivity, see https://docs.duet3d.com/en/Duet3D_hardware/Accessories/Smart_Effector#programming-the-sensitivity

Ian

@dc42

Thank you very much, David. I didn't even consider the "impact" differential with plastic in the nozzle. I was also always calibrating cold. I never considered plastic at the tip might soften the hit and would change the readings. I was originally posting because I was curious about the deviations other users had, and I had no frame of reference for what "normal" would look like.

I will try calibrating at temps with no filament, and it should be more precise and will probably help with the z offset deviation. Why I thought calibrating a machine cold when it only functions hot is anyone's guess. Many thanks.

@blt3dp said in Smart Effector with Toolboard - no programming?:

@achrn

I’d love an effector that supported can without having to lash on a tool board, doesn’t seem that it’s gonna happen though.

Me too, but I decided to bite the bullet and do my own smart effector - toolboard combination. I am intending a 'My Duet controlled machine' post soon (but I have to take youngest daughter back to university this weekend). If the weather's as bad as it's forecast to be on Monday maybe then...

In summary, I've got a laser-cut aluminium plate to push the rods out to 80mm spacing and that gives me space to put on an Orbiter 2 extruder and a toolboard. I did do a bit of smart effector surgery (removed some connectors and soldered wires direct), but that might not be necessary with some slight changes. I lose about 15mm of Z, but nothing in X & Y. I've improved my cooling. Very happy with it so far.

@ignacmc I'm glad you got it working. The other fan just have generated a particularly large magnetic field external to it.

@elmoret thanks. That was what I was hoping.

That's the way the person at E3D I spoke to was suggesting I guess but odly it works out cheaper to just make the set out of spare parts. Go figure 😆

in the video it looks like the fan shroud hits the bed before the nozzle. Also it goes way to slow to probe...

Make sure what part hits the bed before. If not the nozzle, fix it.
2.- Probe at 1200 mm/min at least

@sonitrolio I couldn't find a problem with any of the fans or wires so I installed the new fuse and everything seems to work now. I will call this one solved. Thanks for the information.

@dc42 Yes. My idea is having a solid strain relief anchor point on top of the direct extruder. As I am routing 23 wires to the hotend (heaters, fans, extruder, smarteffector and accelerometer) I am using a 2x12p Microfit and from there routing the wires in bundles to the molex KK and JST. I expect those connectors downstream of the Microfit will not suffer any stress because all is taken by the Microfit. I agree that the Microfit is not an easy connector to deal with. I bought a cheap extractor from aliexpress that seems to do the work

@wbrokow1 the RRF part for Smoothieboard and other LPC processor based boards is no longer maintained, due to the low amount of RAM provided by that processor.

The Smart Effector should work with Smoothieware excep that you won't be able to program the sensitivity.

I've yet to see that there is a measurable difference between heated and unheated nozzle for calibration. With a smart effector/direct nozzle probe, I can see some temp on the nozzle as being beneficial so any filament residue softens enough to avoid affecting the probing process.

Could this have been the feedrate too low? Not sure where I got F300 from, but I bumped it to 1200 and it seems to be working.

@rgrimesj

While I have heard of that device I don't know if it is protected or not.

Frederick

@Phaedrux
thanks for the reply

I am grateful for any suggestion and also from o_lampe.
i am away in the countryside for the weekend but will check again re the operating system but am pretty sure am running 2.03. I have looked at RRF3.4 and will probably upgrade but know changes to the gcodes need to be done too with this. I have not needed to upgrade with the previous effector version 2.

My connundrum is that there is also a clear misfit of the heatsink and the effector: the fit is too tight and the effector may be tilted as a result of this, even after tightening (it was very difficult to remove when I diassembled it all). Reaming the hole in the effector would help but I don't want to do this in a new device.
Hence I have at least one hardware issue, maybe more. The hard probing could be from software too... or other.
Since I have a work around already, using a previous version 1 smart effector modified to work with an IR probe, the printer is working so I am not desperate, just disappointed.

I have replied to E3d too about this.
I will change to RRF 3.4 soon.

As a gesture of good will, we will replace it under warranty.