neal.w2
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Re: life adjust Z - my way

Sep 26, 2018 1:28 pm

Just a note...the upper left side in the photo still has holes along the perimeter. Could be your Z is still too high.

Neal

perry.t
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Re: life adjust Z - my way

Sep 27, 2018 7:17 am

The soap worked! I washed the sheet and dialed in in closer and the result was bang on. Thanks for the help!

christian.b13
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Re: life adjust Z - my way

Oct 05, 2018 9:04 pm

I used this method to get a a good first layer for the square... Then i tried to check the whole bed. I am getting a bit rough surface to the touch for the marked area.. the bed doesnt seems warped... i mea it is acceptable but still the plastic is more squishes here... any ideas ?
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IMG_20181005_230354.jpg
IMG_20181005_230354.jpg (2.18 MiB) Viewed 396 times

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JeffJordan
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Re: life adjust Z - my way

Oct 08, 2018 8:04 pm

nice to notice that my thread is still "alive" and helpful.
8-) :P :idea:

:geek: by the way: @christian.b13 nice powder-coated steel sheet. hope they'll be available soon as spare parts...
dem inscheniör is' nix zu schwör...

andy.b15
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Re: life adjust Z - my way

Oct 08, 2018 9:40 pm

christian.b13 wrote:
Oct 05, 2018 9:04 pm
I used this method to get a a good first layer for the square... Then i tried to check the whole bed. I am getting a bit rough surface to the touch for the marked area.. the bed doesnt seems warped... i mea it is acceptable but still the plastic is more squishes here... any ideas ?
When you print this how long are you letting your bed heat up before starting the print. I had issues where some areas of the bed printed better than others and Prusa sent me a new bed and Y carriage but I saw the same issues. I found by letting the bed heat up for about 5 minutes before the print gave me a better (but no perfect) first layer across the bed. I still have random areas which are higher or lower with no explanation to determine why.

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toaf
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Re: life adjust Z - my way

Oct 08, 2018 10:00 pm

andy.b15 wrote:
Oct 08, 2018 9:40 pm
christian.b13 wrote:
Oct 05, 2018 9:04 pm
I used this method to get a a good first layer for the square... Then i tried to check the whole bed. I am getting a bit rough surface to the touch for the marked area.. the bed doesnt seems warped... i mea it is acceptable but still the plastic is more squishes here... any ideas ?
When you print this how long are you letting your bed heat up before starting the print. I had issues where some areas of the bed printed better than others and Prusa sent me a new bed and Y carriage but I saw the same issues. I found by letting the bed heat up for about 5 minutes before the print gave me a better (but no perfect) first layer across the bed. I still have random areas which are higher or lower with no explanation to determine why.
I believe you. preheating seems to be key.
thanks,
chris

andrea.l5
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Re: life adjust Z - my way

Oct 20, 2018 4:13 pm

Very useful tool. With just zig zag pattern my 1st layer was completely wrong.
With your g-code this is the result at -1122 (PLA):
IMG_20181020_175540.jpg
IMG_20181020_175540.jpg (751.35 KiB) Viewed 262 times
As you can see, the back left corner is still a little high, while the front right corner starts to be rough.
I have to calibrate better with bed level correction. Maybe -1112 as global value, then -30 back and -30 left.
I'll try tomorrow, very useful tool indeed! 8-)

brian.m10
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Re: life adjust Z - my way

Oct 28, 2018 12:44 pm

Excuse my ignorance but I am definitely a newbie. I rebuilt my hot-end after a clogging problem and tried to calibrate the Z-height using the built-in calibration method. Problem with that is that sitting in front of the machine … most of the time the machine is moving...the print line is hidden by the extruder. (I wonder why Prusa couldn't build this 1st Layer Square print method into the machine instead of the line method??)
But here is my problem..... once I have set up my nozzle to "touch" the PEI sheet and the PINDA height by the Zip-tie method I then run the "Calibrate Z-height line" routine.
Then, while its running I start to vary "Live Z-height" numbers. But if the number increases from, say, -500 to -600...is the nozzle moving "DOWN" towards the bed plate(BP) or from -500 to -400 is the nozzle moving "UP" away from the BP...hence does change of Z-height mean that from -500 to -600 squishes the print line lower/flatter or does from -500 to -400 produce a higher/rounder print line??

One last question: what is the latest version (as of 28/10/2018) of the 1st Layer Square test routine V6 ???

FaultyLine
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Re: life adjust Z - my way

Oct 28, 2018 8:29 pm

I think you are asking 3 things here...
1) Does adjusting the Live Z-Height from -500 to -600 result in the hot end getting closer to the bed
2) Does adjusting the Live Z-Height from -500 to -400 result in the hot end getting further from the bed
3) Is "V6" of the live-z-adjust downloads the latest version.

I have a Prusa i3 MK2.5 (recently upgraded) and my printer does the opposite of yours. if I go from -500 to -1000 then my hot end moves away from the bed (it goes UP), which results in a less "squished" line that's thicker in the "Z" axis. If I were to adjust it from -500 to 0 my hot end would move closer to the bed, which results in a very squished line that is very thin in the "Z" axis but would be very wide in either X or Y axis's.

My understanding is that V6 is the latest version of these test patterns.

Hope that helps.

jonathan.h30
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Re: life adjust Z - my way

Oct 29, 2018 3:10 am

Shout to Jeff and pjr and everyone else for all the information available in this thread. My Mk3 kit arrives tomorrow and I'll definitely be referencing this thread again soon. Keep it up yall!

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