exxos blog - random goings on

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Re: exxos blog - random goings on

Post by exxos » Mon Oct 11, 2021 4:00 pm

They don't give you much bodgeroom space on these boards :roll:

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So the ripple is about 10mV now pretty impressive!

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Spikes are not actually noise on the circuit, up interference somewhere else in my room. It is almost impossible to do these measurements accurately unless you're in a totally "silent" room.


This is with the power supply turned off for example..

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Probably needs a little bit more capacitance on the output but overall this chip looked pretty impressive so far!
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Re: exxos blog - random goings on

Post by exxos » Mon Oct 11, 2021 5:39 pm

Does anyone know why this consistently happens in every corner ?

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Re: exxos blog - random goings on

Post by PhilC » Mon Oct 11, 2021 5:43 pm

Belt too tight pulling it off course as it slows down?
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Re: exxos blog - random goings on

Post by exxos » Mon Oct 11, 2021 6:29 pm

PhilC wrote:
Mon Oct 11, 2021 5:43 pm
Belt too tight pulling it off course as it slows down?
Will slack off X as see if anything changes..
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Re: exxos blog - random goings on

Post by exxos » Mon Oct 11, 2021 6:41 pm

exxos wrote:
Mon Oct 11, 2021 6:29 pm
PhilC wrote:
Mon Oct 11, 2021 5:43 pm
Belt too tight pulling it off course as it slows down?
Will slack off X as see if anything changes..
Nope, X & Y pretty loose now and still exactly the same..

Oddly tightening up the X now seems to be creating gaps in between each pass now :roll: I guess I will have to go recalibrate it again :roll:
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Re: exxos blog - random goings on

Post by PhilC » Mon Oct 11, 2021 7:22 pm

@exxos ok, another look. It looks to be showing down extrusion at the end of the runs before it changes direction. There is a setting where you can stop extrusion early, not that I can remember what or where it is
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Re: exxos blog - random goings on

Post by exxos » Mon Oct 11, 2021 7:28 pm

PhilC wrote:
Mon Oct 11, 2021 7:22 pm
@exxos ok, another look. It looks to be showing down extrusion at the end of the runs before it changes direction. There is a setting where you can stop extrusion early, not that I can remember what or where it is
There is, but its all turned off.

Saying that try "extra restart" distance see that does anything.
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Re: exxos blog - random goings on

Post by exxos » Mon Oct 11, 2021 7:39 pm

0.4mm extra restart seems to solve the problem, but gives a little blob..

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Trying 0.2mm now..

That little blob is almost completely gone and there is like there was before on the corners.. Odd..
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Re: exxos blog - random goings on

Post by exxos » Mon Oct 11, 2021 10:05 pm

So this has also been driving me nuts...

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When it does that diagonal infill is to put twice as much down as it is supposed to. The perimeter overlap is only set at 8%, and I am actually starting to get gaps. I do not think this is actually infill as such because altering the percentage or width with does not ever change anything on this first layer.
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Re: exxos blog - random goings on

Post by exxos » Tue Oct 12, 2021 4:09 pm

After much more messing about the gap which was shown in this post Seem to be down to a new feature I just found "linear advance". By default my printer was set at 0.2. So I tried it at 0.1 and those gaps disappeared. I have since lowered it to 0.04.

I have also lowered the extrusion rate down to 93%. Despite everything been calibrated properly, I really question if the software is processing these values correctly.
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viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
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