#Weird Issue I'm trying to solve (lack of zhop?)

83 messages · Page 1 of 1 (latest)

manic crane
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So recently i tried printing a figuring... it went well when it was 10 cm talls, so i scaled it to 17cm, but this time the print had a layer shift effect.
While it was printing i frequently heard weid sound when the hotend was moving like the hotend was colliding with the print, you could hear the sound of plastic being hit by like a needle. I susspect that the hotend hit the print so hard the bel or the engine skiped the tooth and made the layer shift, now my question is ... why it does that? i already had 0.3 z-hop
now im trying the same print but 15cm tall with 1mm z-hop which is insane value and even now I dont see the hotend do the zhop move at all?

Could you guys help me figure this out?

i also suspected that it might have something to do with the hegiht? Small prints dont have this problem, the problems tarts above 10cm probably. I was thinking... mby... just mby the Z engines when they move they make a small mistake? that mistake could add up with each centimetre and would push the hotend down? this might be just me mumbling because the print look fine usually there is no z scale distortion.

Anyway i hope someone more experienced could give me a hand here how could i trouble shoot this in an ez way or fix it

image.png
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ah and the printer is
sovol sv 06
with klipper
fillament is just pla at 205degrees C

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engines are hot but i would say around 50c since i can hold my finger to them for a few secs

polar surge
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Ironicly the zhop can be the reason when the nozzle oozes a little so you would need to retract every zhop

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If it only starts at a certain height maybe try printing just a like 2 cm diameter tube in vasemode. So you can see if there is some zbinding going on

manic crane
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and my ptoblem is not zbinding
as you can see the model has very good smooth surface

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and it suddenly has the layer shift

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even thou the print didnt move

polar surge
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Well then good luck bye

manic crane
polar surge
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Well it took you over 4 days to come up with that ... not showing any motivation and outright ignoring stuff

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You dont have a right to support for free heck even paid.

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So good luck agsin

alpine herald
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Did you enable z hop while retract

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And what axis is the layer shift on

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@manic crane

manic crane
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just as lewis did rn
a single ping and im here

manic crane
manic crane
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i know what was the reason for the layer shift tbh
the nozzle collided with the print hard enough to skip a tooth on the belt

the question is why it does that the higher the print goes the more it happends... is it typical pla expansion? or mby theres something wrrong with Z engines if they were off by some small number each time they move the error could add up and couse something like that where the higher we go the more it collides with the print

alpine herald
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Can you send me the sliced file please?

manic crane
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ow

polar surge
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@alpine herald you forgot to ping

manic crane
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the ccura file?

polar surge
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cant expect some to look at their help request if someone awnsers ^^

manic crane
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i knwo you're angry

alpine herald
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Yea

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@polar surge oh yea

alpine herald
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Internet just cut out for a sec

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So your layer shift happens on your x axis?

polar surge
manic crane
alpine herald
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Okay

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Lemme see the code

alpine herald
manic crane
alpine herald
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Just slice a new one

polar surge
manic crane
alpine herald
manic crane
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custom supports are fked :"D

image.png
alpine herald
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I need the gcode file

manic crane
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ow

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than i have those

alpine herald
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Your machine offsets are all over the place also by the looks of things

manic crane
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this would be the one that failed

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@alpine heraldis taht what you needed?

alpine herald
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Yea, just loading pc up

manic crane
alpine herald
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is your printer running marlin or klipper?

manic crane
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its klipper

alpine herald
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alright, I'm seeing z hops happening

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so the only other thing I could blame for the layer shifts are either z binding or belt tension

manic crane
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whats binding?

alpine herald
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there aren't any z hops on travel

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nvm there are

manic crane
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i might have also had this selected

image.png
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the second ption

alpine herald
manic crane
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probably not but its good to mention

alpine herald
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disable the second one

manic crane
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hmmmm i will look more into z binding but from the description from the video i never saw any print inconsistencies

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here

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this is a print that was done somewhere around the failed one

alpine herald
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check for binding anyway and also try tensioning your belts

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I have to go out now so I hope you are succesful

manic crane
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besides some little underextrusion in some places i dont see any thicker layers anywhere

alpine herald
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also make sure you disable "z hop over printed parts only"

manic crane
manic crane
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i wonder if moving the whole thing up and down a few times and adding some lubricant would solve it

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any model you coudl guy suggest to print to test if the issue is still here?
should i jsut make a tall cylinder? if the problem happends with the travel should this be more cylinders?
hmmm mby hexagonal vertial mesh in shape of a cylinder would be good? it has a decent amount of travels even thou a bit the same\

alpine herald
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Yea just try a tall vase mode print

manic crane
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I thought my problem is with the nozzle colliding with the print when it travels over the print