Tilt Speed Check Failure  

RE: Tilt Speed Check Failure

head over to the prusa shop and log in and hit the chat support in the lower right corner of the page - 24x7 help

RE: Tilt Speed Check Failure

Interesting.  You've covered all the ground I could think of.  Sensor position looked good in the early pic (seemed a bit to the right in the later video, but the angle was wrong, and it wasn't hitting which is all that should matter).  

I'm going to go watch mine with the cover off.  My 'tilt check' seems much faster and smoother than yours (with the cover on) so I'm wondering if it is a stepper motor issue or something else (not a sensor issue).  Stupid question: have you replugged the stepper motor to verify nothing flakey there?

+1 on support, this is beyond simple "wiggle this and make sure that is aligned" debug.  Let us know the result.

RE: Tilt Speed Check Failure

Here is a video of my successful tilt check. (firmware 1.2.1, btw)

My Tilt Check

Very different from yours.  My homes to the top, the smoothly swoops down until it triggers the sensor, backs out and tries the sensor one more time.  

On yours, it stutters all the way down.  My guess: your sensor is showing "closed" all the time.  As the arm starts down, it sees the sensor "closed", so stops, goes slower looking for the physical end (hitting something, sensing the current).  It doesn't find it so it keeps trying a bit further (which takes a while).

Can you verify the sensor gap is clear of any obstructions?  It sounds like a dead sensor.  I don't know how the sensor works electrically (does it look like a open/close switch that can be checked with an ohmeter?  Does it require 3v or 5v, and it puts out oV or 3V depending on open/closed?) but you could try to test it outside the printer).

RE: Tilt Speed Check Failure

Thanks for the replies!

My first step was to contact support. The 24/7 support escalated the issue to an internal developer, hence the weekend delay. 

Yes, the position of the sensor has been all over the place. I loosened the screws and tried every position and wiggle space I could. None of it seemed to make a difference.

I tested the sensor with a meter (attached to the SL1 board but detached from the stepper position, I used a zip tie to trigger it), results of the test are below. Seems like the sensor is operating correctly. 

I checked the stepper motor cables and confirmed they all look normal. I also disassembled the stepper assembly, put it all back together again and tried once more. Still have the same issue 🙁

Thanks for the video also. Yeah, my printer is behaving differently as soon as it starts the speed test, before it even reaches the sensor! There is no physical interference. I'm really stumped 🙁

RE: Tilt Speed Check Failure

Next update... I pulled a stepper from another printer and confirmed that the same issue happens with a known good stepper motor. Also a new and tested sensor. Still having the same issue. I also tried reinstalling firmware again, still no help 🙁

RE: Tilt Speed Check Failure

You are running out of options.  Board replacement?

One note: in the Setting => Advanced Settings => Move Resin Tank, you can smoothly move up/down the resin tank.  The "fast" up/down there should smoothly move the tank at a reasonable pace.  If it does, your stepper and mechanics are fine.  That would leave the sensor (sensor stuck on/off, or board not reading the sensor correctly, or some other board issue).

RE: Tilt Speed Check Failure

Fast move moves smoothly. 

I'm still stuck with the sensor being the issue though because homing works fine?

RE: Tilt Speed Check Failure

Sounds that way.  Hopefully the sensor, slightly easier to replace then the board.  

RE: Tilt Speed Check Failure

Thanks for the assistance Paul. I'm still waiting to hear from support, hopefully on Monday!

RE: Tilt Speed Check Failure

So this is interesting. After trying to home the tilt bed those controls no longer work. If I fast move up and down after a reboot no problems. When I home it goes through the jittery homing process then won’t respond to the fast move controls at all.

RE: Tilt Speed Check Failure

That is interesting.  Several tests on my side:

1) Normal: I can home the printer, then do fast move up/down.  Homing Tank here:

Normal Home

2) Paper blocking optical sensor: printer immediately thinks bed is down and tries to go up:

Blocked Sensor

3) Disconnected sensor: interestingly, the sound/timing is different than 'blocked'

Disconnected

Does yours match any of those behaviors for home?  I couldn't tests movement after home for the 'bad' cases, as I wanted to immediately power off the printer once the stepper started clicking...

RE: Tilt Speed Check Failure

1. Normal Home -- The tilt moves the same way it does when disconnected until the sensor is triggered. Then it is "home" but it also thinks it is all the way back up. I can't fast move up or down. 

https://photos.app.goo.gl/fPw8J4DWpNBFagTG9

2. Blocked Sensor -- I get the same "click-click" sound when I Move Up (before homing of course) beyond the top. Support suggested I change the sensitivity of the tilt in advanced options too -2. This will now make it so up stops when it hits the top and it doesn't click. Aside from that... well the video shows what happens

https://photos.app.goo.gl/dX7SGWnDD991BrTG9  

3. Disconnected -- This behaves basically the same as #1, except where the sensor is normally tripped it will continue until it is bashing into the stop. it will just keep going like this as long as I let it, even though I stopped the video pretty quickly.

https://photos.app.goo.gl/b1SgcEoiiwbDked66  

RE: Tilt Speed Check Failure

Just another update. Support's latest idea was that the issue stemmed from the connecting rod and holder protrusion not being flush. 

Assembly Book Reference: https://photos.app.goo.gl/tw6JmmKQ5ugE1Y8V7
My Printer: https://photos.app.goo.gl/fYFjELfpEzDkcfaF6

So after careful disassembly and reassembly, they are now flush. But the issue persists

https://photos.app.goo.gl/5SsC5JqPUyuWx515A

RE: Tilt Speed Check Failure

Any update?  Are they sending you new parts or did you get it working?

RE: Tilt Speed Check Failure

Sorry for the delay, there wasn't much of an update to be made. 

Support RMA'd my stepper motor and the motion controller. New ones arrived today, got them installed, ran through calibration, and my first print is underway right now!

Thanks again for the support 🙂

RE: Tilt Speed Check Failure

Good news! Happy printing!

RE: Tilt Speed Check Failure

2 weeks in now. SL1 has been spitting out prints, several a day, pretty much every day, with no issues at all! My FEP film is starting to look a little worn, and I've had to top off the IPA for the CW1 a couple of times, but nothing unexpected has happened at all.

Overall, I'm very happy with the machine!