Pinda2 to Duet3 toolboard

martin7404

EDIT: I1 and pullup removed from code
I spent an hour or so reading the different posts to find how to wire and set Pinda2 probe on the tool board v1.1 of my new CoreXY machine. So here is some info for others to use. This will work for other inductive sensors, just do not connect temp1 connector
Wiring
Pinda_Duet_toolboard v1.1.png

Configuration

; Z-Probe
M671 X-31.39:250:531.36 Y18:433.3:18 S10       ; Locations left, center, right   
M558 P8 C"121.io2.in"  H0.7 F1000 T6000 A20 S0.005 ; PINDA set Z probe type to switch and the dive height + speeds
M308 S2 P"121.temp1" A"PINDA" Y"thermistor" T100000 B3950
G31 P500 X-3.20 Y0 Z2.5                                    ; set Z probe trigger value, offset and trigger height
M557 X20:485 Y41:360 P7                             ; define mesh grid

Here is the probe repeatability test result

6/6/2021, 9:26:30 AM	G32 bed probe heights: -0.001 -0.003 -0.003 -0.002 -0.002 -0.003 -0.002 -0.003 -0.002 -0.003 -0.001 -0.003 -0.003 -0.003 -0.002 -0.002 -0.001 -0.001 -0.002 -0.001 -0.000 -0.001 -0.002 -0.002 -0.002, mean -0.002, deviation from mean 0.001

dc42

@martin7404 thanks for sharing this.

droftarts

@martin7404 said in Pinda2 to Duet3 toolboard:

M558 P8 C"^121.io2.in" I1 H0.7 F1000 T6000 A20 S0.005 ; PINDA set Z probe type to switch and the dive height + speeds

Small error in the above: in RRF 3, the 'I1' to invert the probe signal is deprecated and this parameter is being ignored. So the probe signal is not being inverted. See https://duet3d.dozuki.com/Wiki/Gcode#Section_M558_in_RepRapFirmware_Num_3

Ian

dc42

@droftarts said in Pinda2 to Duet3 toolboard:

@martin7404 said in Pinda2 to Duet3 toolboard:

M558 P8 C"^121.io2.in" I1 H0.7 F1000 T6000 A20 S0.005 ; PINDA set Z probe type to switch and the dive height + speeds

Small error in the above: in RRF 3, the 'I1' to invert the probe signal is deprecated and this parameter is being ignored. So the probe signal is not being inverted. See https://duet3d.dozuki.com/Wiki/Gcode#Section_M558_in_RepRapFirmware_Num_3

Ian

Also, the ^ pullup enable should not be used on Duet 3 IOx_in ports..

oc_geek

@dc42

@dc42 said in Pinda2 to Duet3 toolboard:

Also, the ^ pullup enable should not be used on Duet 3 IOx_in ports..

Could you please elaborate a bit more on this, why is that ?
...and does "Duet3" do include Mini variants ?
Thanks

droftarts

@dc42 said in Pinda2 to Duet3 toolboard:

Also, the ^ pullup enable should not be used on Duet 3 IOx_in ports.

Bah, always forget that one!

Ian

droftarts

modules:composer.user_said_in, @oc_geek, Pinda2 to Duet3 toolboard

@dc42

@dc42 said in Pinda2 to Duet3 toolboard:

Also, the ^ pullup enable should not be used on Duet 3 IOx_in ports..

Could you please elaborate a bit more on this, why is that ?

The pullup resistor (internal to the MCU, so not something we can remove) never needs to be enabled when using Duet 3 IOx.IN pins, and doing so worsens the noise margin.

...and does "Duet3" do include Mini variants ?

Yes.

Ian

oc_geek

i find my end-stops (hall effect) work much better with ^ rather then without
If i remove ^ i get false triggers... so this appears a bit strange tbh..

@droftarts

droftarts

@oc_geek on Duet 3 Mini 5+? @dc42 do you have a view on this?

Ian

martin7404

@oc_geek same story I tried and i gives me false triggers on Pinda 2 too
EDIT
I did the first tests without cycling power, after a power cycle, now it works ok without Pullup

martin7404

@dc42 I still do not know if using ^ will damage my duet3

Phaedrux

@martin7404 No I don't think it will damage the board. I think the worst case is just lowering the noise floor. But it seems to work BETTER for you?

dc42

@martin7404 said in Pinda2 to Duet3 toolboard:

@dc42 I still do not know if using ^ will damage my duet3

No it won't.

martin7404

TO warp up
In the end I found that it is working both ways with or without pullup.
I ended up changing pinda2 to superpinda, as far I got one delivered and super panda is working flawlessly with the same config

kb58

@martin7404 Just curious, where were you able to purchase a superPinda? Prusa only sells them to registered owners. Asking because I would like to get one as well.

martin7404

@kb58 prusa online shop, I have mk3 printer. You can always ask somebody local for you with original prusa to order 1 for you