new buildt, the steering knob on the display doesn't work correctly  

RE: new buildt, the steering knob on the display doesn't work correctly

I am impressed you built it in one day. It took me 4 days - and I felt like I was pushing it.

The knob is just a rotary encoder. Contact support and let them step you through it.

Click EShop, sign in, and click the Chat button.

Also: the display shows what after boot? What happens after you push the big X? The printer has to complete initialization before it will handle the encoder.

RE: new buildt, the steering knob on the display doesn't work correctly

Probably stupid question, did you try to turn it in both directions?

RE: new buildt, the steering knob on the display doesn't work correctly

Thanks for your answers. 

Yes, I tried it both ways 😀 .

And after some investigations I contacted the support. They will send me a new display. Hopeful this will solve it.

Regards Michael

RE: new buildt, the steering knob on the display doesn't work correctly

Ooups, I didn't see all the questions. First embarassing point was to choose  the language. I could only confirm english. The next step would have been to start the test, which I hesitated to begin without a functioning encoder. 

The support today asked me to do so, and it passed all the tests. But I couldn't start the fine leveling, because at that moment I need this encoder, as far as I understand it. So the support was ok to send me a new one.

Regards Michael

RE: new buildt, the steering knob on the display doesn't work correctly

Japanese  would be, I guess, more convenient.  😀 I keep my fingers crossed. Let us know about the result.

RE: new buildt, the steering knob on the display doesn't work correctly

The reset button and the confirmation button of the encoder are functioning, only turning the button has no effect. Does anybody say how I could measure this encoder?

RE: new buildt, the steering knob on the display doesn't work correctly

Here you can find how the rotary encoder works, so how to measure the output .

So measure the output pins, the best with osciloscope or just a multimeter . So both A and B outputs have to be working. So it can be a matter of rotary encoder fault, cabling, encoder power supply. main board processing input. 

I would expect the reset button is separate from the rotary encoder connected directly to the main board reset pin.

RE: new buildt, the steering knob on the display doesn't work correctly

My own guess at this point is the firmware is not getting through initialization.

We will know more if the OP posts what the display shows. If it shows normal idle display, and correctly handles knob push,

and display does not move with rotation - it might be an encoder problem. But that is a lot of ifs...

RE: new buildt, the steering knob on the display doesn't work correctly

Installation manual - did you have a chance to check?

Step 36 Connecting the LCD cables

The pink stripe on the LCD cables should be facing upwards.

RE: new buildt, the steering knob on the display doesn't work correctly

The display is behaving absolutly normally, and I verified the connections several times. The pink strips are showing upwards. I'm not an expert, but I passed the installation process after mounting, and the only problem I had was not to be able to choose something other (language, Yes/No). If firmware wouldn't be initialized, all this would not be possible.

What I didn't measure yet is if a wire is broke in the cable. Externally there is no problem visible. The problem with measuring the cable is, that the wires are not easyly accessible, and that I do not want to destroy the connectors. It's a brand new machine which I got tuesday. I will not be the fastest guy who destroys it 😀 Besides, perhaps I have an idea how to create a connector out of spare parts

I will see what I can do, I have a very basic oscilloscop somewhere, a selfsoldered set from China

I appreciate a lot your comments and help

Regards Michael

RE: new buildt, the steering knob on the display doesn't work correctly

After a one day build, be prepared: this won't be your only problem.  A guy who won the build race (built his in about 4 hours) ended up selling it for parts after he started encountering self inflicted problems that required near complete tear downs to correct.

The encode works AFTER you push the button to select a menu item. Until that push, the encoder usually does nothing. If pushing the button brings up  a menu, and then rotation does nothing (try both directions), then troubleshoot.  You can test the encode function with a DMM: no scope needed. Just - and I know this is hard for you - turn the knob slowly so the DMM has a chance to see the voltage changes.

Prusa support is available via store CHAT.  They'll probably be your best choice since only they can send you replacement parts under warranty.

RE: new buildt, the steering knob on the display doesn't work correctly

OK, I measured the cable and it seems to be ok. 

Concerning the buildt time, it was one day from the early morning until 11 h the evening, and to be honest, I began the evening before.

I did this buildt as good as I could, not as fast as possible. And I think that I didn't make more errors than all the other beginners in 3D. The self test has passed, it's only this knob that doesn't function.

As I wrote before, I contacted the support and they will send me a new LCD. No problem, but as I know that it is hard to make a diagnostic from far away, I try to investigate a little myself. 

Best regards Michael

RE: new buildt, the steering knob on the display doesn't work correctly

I keep my fingers crossed, after you receive the spare part and repair let us know please, any new knowledge will help all of us.

Regards

Zoltan

RE: new buildt, the steering knob on the display doesn't work correctly

I would also be interested in how long it takes to get the part to wherever you are located.

I keep hoping for better stock on Amazon - 2 day shipping has me spoiled.

RE: new buildt, the steering knob on the display doesn't work correctly

Unfortunately I won't be at home next week, have to work. Not sure if I will know when the parcel arrives. I'll try.

I tried to measure it yesterday, but I don't really understand the result. I put 5V out of an USB cable on the board on exp1. That lightens the display and gives me a 5 volt tension on one pin of the three pins of the encoder, the upper one. At this pin I have a changing signal when turning, when turning slowly even with the multimeter 😀 .

But there should be plus on all of them, and if only one channel is functioning, at least two, the plus in without the signal and one (or better two) with the signal. I guess that there is something wrong with the encoder, but I can't really figure it out

Regards Michael

RE: new buildt, the steering knob on the display doesn't work correctly

Okay, the new display arrived tuesday, but I arrived only yesterday evening. Mounting the new display this morning actually solved the problem.

Now I'm struggling with the adhesion of the PLA on the bed surface 😀.

There will be a solution. I guess.

Regards Michael

RE: new buildt, the steering knob on the display doesn't work correctly

Great news !!!

Poor adhesion issue can be beaten by clean print sheet washed by kitchen detergent and splashed by as hot as possible water. You can afterwards apply a Isoprophyl if still needed. If this does not help enough, I am using the attached glue stick. It worked for me well all the time especially for models with larger base.

The smooth PEI sheet works for PLA better than the textured one. Check carefully the first layer calibration especially for the textured sheet and then the live-Z.

FW 3.8.1 provides you the ability to calibrate 8 different sheets (or sheet profiles)  so I am using four of them to calibrate the smooth sheet for different types of filament and four of them for the textured sheet. The only issue I am sometimes heading not to forget before start of each print to chose the the correct sheet profile. 😉 

RE: new buildt, the steering knob on the display doesn't work correctly

My problems are solved!

The problem with the display knob was a hardware problem, and changing the display was the solution.

My problems yesterday with first layer adhesion of PLA at this new textured plate had a quite simple solution. I brought down the speed to 60 mm/s. I read a lot of comments yesterday on how to proceed for first layer calibration, and speed was never mentioned. 

Never a plate has been as proper, and I was thinking of doing ugly things to it, and was doubting about my build quality too. And after one entire day of testing and washing and creating large amounts of plastic waste I diminuished the speed, and printed my first print with PLA on this surface without any problem

The design is Prusa i3 MK3 Filament Guide REMIX by Solid_Alexei, it fits really well, but I didn't test its functionallity yet.

Regards Michael