exxos blog - random goings on

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Re: exxos blog - random goings on

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PhilC wrote: Tue Jun 29, 2021 12:53 pm @exxos you could try swapping out the main board etc for something by Bigtreetech perhaps? I got rid of my Creality boars and fitted a BTT one with colour screen etc and the quality has been much improved.
Yeah have been considering that as well. Cura has a lot more options to break stuff than flashprint.

It is not printing to bad currently, but I swear half the settings do not actually do anything in the software.I'm trying to figure out why the base of the print is larger than the rest of it still.
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Re: exxos blog - random goings on

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@exxos might be due to the initial layer height as the idea is to squeeze the first layer onto the print bed for better adhesion?
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Re: exxos blog - random goings on

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PhilC wrote: Tue Jun 29, 2021 1:07 pm @exxos might be due to the initial layer height as the idea is to squeeze the first layer onto the print bed for better adhesion?
I thought that.. but changing the height seems to make no odds or the flowrate to 50%. I thought maybe because of shrinkage and the first layers been fixed to the bed that was not shrinking as much.. Going from 120c to 65c bed temp made no odds either.

I have lowered the bed a fraction..

lowering bed 1 screw indent

4.52mm to 4.65mm height (supposed to be 5mm but its ABS)

The problem seems to have been reduced this time. Going to order some metal shims of various sizes from somewhere.. Thickness of the card they supplied is 0.18mm but I think something like 0.25mm would be better by the looks of it.
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Re: exxos blog - random goings on

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Printing all day again.. Seems the calibration cards they send with the printer is pretty rubbish. It measures about 0.17mm thick but when it prints out there is almost no bottom layer there is that thin. So I folded the card over and recalibrated approximately 0.37mm.. And things are almost perfect now!

I think the bulge at the bottom was simply down to the filament not being able to flow on the very first layers. So it increase pressure which got released on subsequent layers causing the bulges.

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Considering as well I am printing at a 0.8 mm layer height with a 0.4 nozzle with ABS..I think it has turned out really well..
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Re: exxos blog - random goings on

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@Icky @rubber_jonnie You any ideas on this ?

I have a odd problem where either the X or Y is wrong. When I print a square, X=24.72mm , Y=24.50mm. The stl is 24.80mm. So Y axis is out the most. Do you know why this happens ?

The belts seem tight, but it could be anything..

Y axis has belts all over the place...


Rear motor belt drives a rod to the left and right belts for Y movements...

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Left side Y belt (same setup on the right)

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X is on a belt on its own motor as well..

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So either Y is to small, or X is to big :stars: :shrug:

I notice this post where he seems to have the same problem, but no replies :(

https://www.reddit.com/r/FlashForge/com ... libration/
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Re: exxos blog - random goings on

Post by rubber_jonnie »

Are the sliders sticking at all on those axes?
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Re: exxos blog - random goings on

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Does your firmware have the facility to calibrate the extruder?
Also there seems to be some inconsistencies in the layer positions although minor. One thing to check is if a belt is too tight it will also have detrimental effects on the print.

I have a couple of spare but new motherboards, btt etc. I can send you one to try?
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Re: exxos blog - random goings on

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rubber_jonnie wrote: Tue Jun 29, 2021 10:06 pm Are the sliders sticking at all on those axes?
Not sure what your referring to exactly ?

PhilC wrote: Tue Jun 29, 2021 10:35 pm Does your firmware have the facility to calibrate the extruder?
I don't think so no :(
PhilC wrote: Tue Jun 29, 2021 10:35 pm Also there seems to be some inconsistencies in the layer positions although minor. One thing to check is if a belt is too tight it will also have detrimental effects on the print.
The Y-axis is on those spring things in the belt, so can't really do much with those. I could slacken the motor off which drives them, that's on a fixed belt.
PhilC wrote: Tue Jun 29, 2021 10:35 pm I have a couple of spare but new motherboards, btt etc. I can send you one to try?
I may have to change the board if there's no solution. Though i've no idea which is a "good" board with gives the best settings ? I have one spare board I got for my paste printer, can't remember what it was off-hand. I guess I could try that one if its got the right connectors on it for a straight swap.
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Re: exxos blog - random goings on

Post by Icky »

@exxos, sounds like you need to recalibrate and calculate your steps/mm for your stepper motors.
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Re: exxos blog - random goings on

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Icky wrote: Wed Jun 30, 2021 12:07 am @exxos, sounds like you need to recalibrate and calculate your steps/mm for your stepper motors.
There is no options in the software to do that though :(
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