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Small first layer issues at start of line  

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Dave H
(@dave-h)
Active Member
Small first layer issues at start of line

You can see from the picture that though first layer adhesion is mostly good and the calibration test looks good when the printer starts with a new line, it doesn't adhere very well for the first 1-3mm. This is an AmazonBasics PLA which seems to exhibit this problem more than the Prusament I have. 

Any ideas what this might be?

Here is a bench I've previously printed. Looks good aside from the missing inner part of the D

Best Answer by Alex Hung:

@dave-h-2

If you worry about hitting the z height adjustment limit, you can move the PINDA/SPINDA up one notch or two. Then re calibrate the first layer and the z height adjustment should move to closer to -1.0

This topic was modified 10 months ago by Dave H
Posted : 25/01/2021 5:57 pm
Alex Hung
(@alex-hung)
Trusted Member
RE: Small first layer issues at start of line

Judging from the benchy picture, I think you can lower the z height by a fraction more. Perhaps another 0.05 mm which will fill in more of the gaps, as well as helping the adhesion.

Posted : 26/01/2021 3:16 am
Dave H
(@dave-h)
Active Member
Topic starter answered:
RE: Small first layer issues at start of line

That has helped - the D stuck on my benchy test. However, I worry there is something else wrong, the value is down all the way to -1.990 I was cautious to push it that far, I could have made it -2 - the maximum.

Is this a symptom of another problem?

This post was modified 10 months ago 3 times by Dave H
Posted : 26/01/2021 1:32 pm
remington
(@remington)
Eminent Member
RE: Small first layer issues at start of line

I’d have said textured sheet on pla + z height not low enough. I’m pretty much exclusively using the amazonbasics pla and have to run it hotter and slower, but it sticks to the smooth build plate no problems with the correct z height.

Posted : 26/01/2021 5:46 pm
Alex Hung
(@alex-hung)
Trusted Member
RE: Small first layer issues at start of line

@dave-h-2

If you worry about hitting the z height adjustment limit, you can move the PINDA/SPINDA up one notch or two. Then re calibrate the first layer and the z height adjustment should move to closer to -1.0

Posted : 26/01/2021 9:48 pm
Dave H
(@dave-h)
Active Member
Topic starter answered:
RE: Small first layer issues at start of line

Makes sense thank you.

I followed the MINDA guide which involved putting a credit card/cable tie under the sensor. I assume this means I need a slightly thicker credit card so that the sensor is further away from the build plate.

Posted : 26/01/2021 11:29 pm
Dave H
(@dave-h)
Active Member
Topic starter answered:
RE: Small first layer issues at start of line

I'm happy with the way things are printing now. I think my troubles calibrating the first layer where a symptom of following the MINDA guide; despite doing this to the letter the calibration was still at the maximum of the range. 

Now that I've moved the sensor up, I'm able to calibrate at around -0.75 which has made things a bit easier! 

Posted : 27/01/2021 9:47 am
remington
(@remington)
Eminent Member
RE: Small first layer issues at start of line

Great news 🙂

Posted : 27/01/2021 5:34 pm
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