Notifications
Clear all

new kit build: bottom and top layer issues  

  RSS
mike.m9
(@mike-m9)
Eminent Member
new kit build: bottom and top layer issues

ive played around with live z numerous times now. i finally settled on -.850 as the best z offset before i notice scratching. i still see small gaps. the first pic is the top layer which doesnt look great to me. the second pic is the bottom which looks better but not what id consider perfect.

i just built the kit so this is like my 1st real print after doing first layer calibration and a calibration cube. i verified im within the offset +-40 for the belt tensions.

any help on how to fine tune further?

much appreciated!
-mike.

Posted : 19/05/2018 5:38 pm
JoanTabb
(@joantabb)
Moderator
Re: new kit build: bottom and top layer issues

Hi Mike,
the pictures are Blurry at my end...
could you please try taking them again from a little further away?

regards Joan

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK

Posted : 19/05/2018 7:02 pm
mike.m9
(@mike-m9)
Eminent Member
Topic starter answered:
Re: new kit build: bottom and top layer issues

thanks for the feedback. funny how pics look good on a cell phone but no so much when you view from your computer. the first pic is the top layer and the second pic is the bottom. starting to think my z-axis is too low and maybe it's scrapping? although, if i raise it too much i start to get gaps.

i forgot to mention that i tested my e-steps. i measured out 120mm. sent the cmd to send 100mm through. it was dead on 20mm left, so i assume my e-steps are perfect (surprising based on how many people complain about under extrusion.)

thanks,
mike.


ive played around with live z numerous times now. i finally settled on -.850 as the best z offset before i notice scratching. i still see small gaps. the first pic is the top layer which doesnt look great to me. the second pic is the bottom which looks better but not what id consider perfect.

i just built the kit so this is like my 1st real print after doing first layer calibration and a calibration cube. i verified im within the offset +-40 for the belt tensions.

any help on how to fine tune further?

much appreciated!
-mike.

Posted : 19/05/2018 8:05 pm
JoanTabb
(@joantabb)
Moderator
Re: new kit build: bottom and top layer issues

Hi Mike,
the area to the right of the picture on the first layer, seems as if the strands have not merged,,, so it looks like the live Z could go down a little further. this is not an easy colour to see in photographs,

is the top rough?

if so you may benefit from reducing the extrusion multiplier,

regards Joan

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK

Posted : 19/05/2018 10:48 pm
mike.m9
(@mike-m9)
Eminent Member
Topic starter answered:
Re: new kit build: bottom and top layer issues

thanks for the feedback joan. if i lower z much more i do in fact get scratching. im new to this so i dont get why id get this on the first layer. why would changing the extrusion multiplier matter for scratching?

thanks!

Posted : 22/05/2018 3:30 am
Dibujor
(@dibujor)
Eminent Member
Re: new kit build: bottom and top layer issues

I guess what joan says is that if you reduce your extrusion multiplier (hence extruding less filament) you can lower your z height a bit more without scratching. I'm new to this too, so take whatever I say with a grain of salt 🙄

Have you tried adjusting your live z following this thread?

Also, for the pictures, with prusa silver pla it is better if you take them with a bit of indirect light. If the light is more or less directly over the print it shines too much and your hand creates shadows so it's difficult to really see the details.

I made this and this with my phone taking that into account.

Posted : 22/05/2018 2:16 pm
Share: