Re: Oozing/ribbing
Hope your exhibition was fun.
Animals this time. 3 days starting tomorrow. Plus I have another one on Saturday...
Peter
Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage…
Re: Oozing/ribbing
Hope your exhibition was fun.
Animals this time. 3 days starting tomorrow. Plus I have another one on Saturday...
Peter
Oh cool. Are they 3D printed animals?
Re: Oozing/ribbing
Oh cool. Are they 3D printed animals?
No, but they could have been...
In this case we are exhibiting real live geese, ducks, chickens, rabbits etc. Wifey has about 500 animals.
Peter
Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage…
Re: Oozing/ribbing
Oh cool. Are they 3D printed animals?
No, but they could have been...
IMG_20170607_093821.jpg
In this case we are exhibiting real live geese, ducks, chickens, rabbits etc. Wifey has about 500 animals.
Peter
Wow, those prints are impressive. I love that brown sheep 🙂
Re: Oozing/ribbing
I have now put the latest KISS Post Processor on my FTP if you want to download it.
I have also sliced your model and am printing (without supports) using variable layer height (0.8 to 0.32). Will upload some pictures when I stop it at about 25mm.
Peter
Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage…
Re: Oozing/ribbing
Humm. Perplexed. Still have ribbing.
But the ribbing only starts where the layer height increases, which does tend to imply that the preload values are wrong for thicker layers. Which is why Jonathan has suggested that variable layer height ranges should be limited.
I will try again with fixed layer heights to see how it turns out.
The upside is that without magnification, it's not really possible to see the ribbing.
Peter
Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage…
Re: Oozing/ribbing
I have now put the latest KISS Post Processor on my FTP if you want to download it.
I have also sliced your model and am printing (without supports) using variable layer height (0.8 to 0.32). Will upload some pictures when I stop it at about 25mm.
Peter
Yes I will try the update out right now 🙂
I still don't fully get the preload concept. But what I got from the KISSlicer forum is that lower preload is less extra filament to generate spring force.
Too much spring force is more oozing.. I'm confused
Thanks again for your help 🙂
Re: Oozing/ribbing
Preload (also know as "Pressure Advance" or "Linear Advance") Is one of those "black magic" thinks that only a very few exceedingly clever people understand...
The way I see it is this.
You need a certain amount of pressure in the nozzle to extrude a certain volume of filament at a certain speed with a certain filament.
Simple example. You want to print a line. At the start of the line, there is absolutely no pressure in the nozzle; at the end, there is way too much.
Preload attempts to compensate for this by taking into account the elasticity of the cold filament, the viscosity of hot filament and the extruder geometry.
Getting it right means that every line printed is perfect. Getting it wrong can make a mess...
KISS seems to have gotten the calculation right, but only for a small range of layer heights.
Peter
Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage…
Re: Oozing/ribbing
Preload (also know as "Pressure Advance" or "Linear Advance") Is one of those "black magic" thinks that only a very few exceedingly clever people understand...
The way I see it is this.
You need a certain amount of pressure in the nozzle to extrude a certain volume of filament at a certain speed with a certain filament.
Simple example. You want to print a line. At the start of the line, there is absolutely no pressure in the nozzle; at the end, there is way too much.
Preload attempts to compensate for this by taking into account the elasticity of the cold filament, the viscosity of hot filament and the extruder geometry.
Getting it right means that every line printed is perfect. Getting it wrong can make a mess...
KISS seems to have gotten the calculation right, but only for a small range of layer heights.
Peter
So basically it's a method of extruding the exact amount of filament needed? I don't even want to think about how to calculate that xD
If it could work well, that can help relieve a lot of problems. But I suppose it's very material specific?
Re: Oozing/ribbing
But I suppose it's very material specific?
Yes, think is that even different colours can have an effect.
There is a version of firmware which includes Pressure Advance, but the problem there is SNMM potentially using 4 different filament types.
Peter
Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage…
Re: Oozing/ribbing
Fixed layer heights look better.
Just wish I had the temp set correctly.
Layer height = 0.2mm, temp should be 200 - mine was set at 205.
Peter
Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage…
Re: Oozing/ribbing
Fixed layer heights look better.
IMG_20170908_124218.jpg
Just wish I had the temp set correctly.
Layer height = 0.2mm, temp should be 200 - mine was set at 205.
Peter
Very nice! I'm so happy right now 🙂
