MK3S: "Selftest error! Please check Endstops wiring error z" on wizard  

RE: MK3S: "Selftest error! Please check Endstops wiring error z" on wizard

Hi Tim 
does the Pinda setting display on the LCD Sensors menu, change values, in line with the led on the pinda?

the Mk3S+ Pinda has three wires. +5volt, Ground and Signal.  Other Mk3 series  Pinda's have 4 wires  the 4th wire is a thermistor
If the signal wire is faulty, the Red led will still change stat when metal is near the tip of the pinda but the signal will not be seen by the Rambo controller
the Pinda wires may have suffered stress fractures from repeated movement,

when this happened to me,  I repaired the Pinda wire like this 

regards Joan

RE:

Thanks for the info Joan! I have the MK3S with the 4-wire pinda cable.

Re: does the Pinda setting display on the LCD Sensors menu, change values, in line with the led on the pinda?

I can't find this setting. My display shows "selftest failed" on the lowest line. The only menu item I could find relating to Pinda was ">Calibration>PINDA cal." When I select that it says "Please run XYZ calibration first". When I try to run XYZ calibration, it moves the X-carriage to the top, gets to the point where I put a piece of paper on the bed; the X-carriage comes down about 1 cm and gives "Calibration failed. Check the axes and run again". The only other thing I can find is ">Settings>PINDA cal.", which is [off]. I changed it to [on] temporarily as a test but there was no change.

I'll try to solder in new wires for the PINDA & see if that solves it.

RE: MK3S: "Selftest error! Please check Endstops wiring error z" on wizard

Update: I've replaced the 4 wires from 1" from the carriage all the way to 1" from the connector inside the Einsy Box. Everything seems the same as before. PINDA light is on and goes out when a metal object is placed nearby.

Tried to run the wizard: checks both fans (OK) then moves the carriage up about 1 cm. Then stops and gives:

Selftest error!

Please check:

Endstops

Wiring error               Z

It says to check the handbook and fix the problem, but I can't find any handbook that I received, or anything on the Prusa site.

I could change to the SuperPINDA, but it does seem strange that the wizard generates an error before the carriage ever gets near the platter.

When I try to calibrate XYZ, it homes X & Y, then moves the carriage to the top, comes down ~1 cm & says calibration failed. check the axes and run again.

RE: MK3S: "Selftest error! Please check Endstops wiring error z" on wizard

Could this be the handbook?
https://cdn.prusa3d.com/downloads/manual/prusa3d_manual_mk3s_en.pdf

joan

RE: MK3S: "Selftest error! Please check Endstops wiring error z" on wizard

Thanks for that handbook link @joantabb :

On p 46, I found: 8.8 Sensor Info. I think that's what you were meaning in your "Sensors menu" question in your 1st post, which I could not find before. The correct path seems to be >Support>Sensor Info, which displays the PINDA and Fil. sensor status. Checking the PINDA sensor that way:

Initially, PINDA was reading 1 all the time on the display, whether a metal object was close by the sensor or not, even though the red light on the sensor was going on and off appropriately to the metal object. The Fil. sensor was reading correctly as 1, filament loaded. Filament removed to test Fil. sensor. The Fil. sensor then displayed 0, as it should. Oddly, the PINDA sensor then started reading correctly, starting at 0 and going to 1 when the metal object approached. I then reloaded the filament - the Fil. sensor worked correctly, but now the PINDA sensor seemed to be working as well, going to 1 whenever the PINDA light went off when I placed a metal object nearby!

However, I ran the wizard twice and it hung in different places in the algorithm, and the PINDA sensor is back to reading 1 all the time, so I suspect my PINDA or the wiring is toast and working intermittently. I'm planning to order a new SuperPINDA, as well as a tube of lube for my sliders as I didn't get one originally and I see this in the manual. I assume I want the white 5 g tube labelled PRUSA since that seems to be referenced in the manual. Is there anything else you'd recommend I get with the order, while I'm doing the shipping?

Does anyone know if PRUSA has shipping options to pre-pay the GST (Canadian taxes)? It's only 15%, but some of the couriers charge a $55 collection fee (on 4$ worth of taxes) which could make this PINDA pretty dear when all is said and done.

++ Thanks

RE: MK3S: "Selftest error! Please check Endstops wiring error z" on wizard

try printed solid in the USA, they may have better terms... 
or consider using ebay, that's where  got my last Pinda from... 
the grease is white lithium grease, again ebay may be more cost effective. 

regards Joan