almost working December 08, 2015 11:00AM |
Registered: 8 years ago Posts: 31 |
Re: almost working December 08, 2015 12:17PM |
Registered: 10 years ago Posts: 14,672 |
Re: almost working December 08, 2015 01:23PM |
Registered: 8 years ago Posts: 31 |
Re: almost working December 08, 2015 01:35PM |
Registered: 8 years ago Posts: 197 |
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DrDoggy
abs, its like a rectangle about the size of a hotdog, it is folding up to the shape of a bow, so the center is flat on the bed but all corners are 5mm off the ground
It does not happen till after about 10 layers or so, turning down the temp on the bed made it worse, temp on bed struggles to hold at 110 celcius, so turning it up isnt an option
Re: almost working December 08, 2015 01:46PM |
Registered: 8 years ago Posts: 31 |
Re: almost working December 08, 2015 02:41PM |
Registered: 10 years ago Posts: 14,672 |
Re: almost working December 08, 2015 05:13PM |
Registered: 8 years ago Posts: 197 |
Quote
DrDoggy
I have been leaving the cooling fan off with no results, will get pics tonite
(layer fan?) you mean the fan that cools extruder heat sink?
Re: almost working December 09, 2015 11:13AM |
Registered: 9 years ago Posts: 346 |
Re: almost working December 10, 2015 08:45AM |
Registered: 8 years ago Posts: 31 |
Re: almost working December 10, 2015 09:10AM |
Registered: 8 years ago Posts: 31 |
Re: almost working December 10, 2015 11:36AM |
Registered: 9 years ago Posts: 346 |
Quote
DrDoggy
only one fan.... got a pic so i can see what i need to get?
first layer prints fine, im using kapton tape and hot glue until i get some hairspray, works ok but leaves sticky layer on bottom which i dont mind for now since i pull first layer off anyway, but watch as it builds up, you will see it gradually warp. first two pics you can see the shadow where it starts to curl, in third pic you can really see the warp, after a few more layers the curve lifts enough to get caught in the nozzel and with the warp and it no longer sticking to the bed, shifts the print out of place and ruins.
if i catch it in time i can pause print , use heat gun to smoothen flat , then thick layer of hot glue around the short edges for adhesion, then i turn off bed completely let hot glue cool and continue print OK (as long as the print is thick enough), however this is not ideal for several reasons.
I had successful print the other day, not sure why, was a bit warm that day, but would +10/20 degrees in room temp really have that much impact, i will try full enclosure next....
Re: almost working December 10, 2015 11:43AM |
Registered: 9 years ago Posts: 346 |
Re: almost working December 10, 2015 01:41PM |
Registered: 8 years ago Posts: 31 |
Re: almost working December 10, 2015 03:09PM |
Registered: 8 years ago Posts: 197 |
Re: almost working December 10, 2015 04:28PM |
Registered: 9 years ago Posts: 346 |
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DrDoggy
bed is metal/steel,
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DrDoggy
should i get other fan, also if i understand it should point at tip of nozzel , or top layer of plastic, but not at bed?
Re: almost working December 10, 2015 07:16PM |
Registered: 8 years ago Posts: 31 |
Re: almost working December 10, 2015 07:59PM |
Registered: 8 years ago Posts: 197 |
Yea change the z probe z height offset.Quote
DrDoggy
ok I will change it , thanks for all the great help guys!
but in regards to this , should i change the z probe offset value?
OR (should i say)
does the g29 code actually autolevel and reset the base location in firmware?
Re: almost working December 10, 2015 08:22PM |
Registered: 8 years ago Posts: 916 |
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LarsK
(1) Increase the Z-length by 0.2 (printer settings). and set the first layer bed height to 0.3 (slicer settings).
This will push your nozzle closer to the bed. Do this even if you think you have perfect bed alignment. This will "trick" the printer into really pushing the first print layers onto the bed.
Have a look at these images to understand. To a very rough first approximation, the more pushed into the bed the better bed adhersion. But at a cost of print quality. But get your printer working, then you can start making better print.
Re: almost working December 10, 2015 10:09PM |
Registered: 8 years ago Posts: 28 |
Re: almost working December 11, 2015 05:56AM |
Registered: 9 years ago Posts: 346 |
Quote
nebbian
Quote
LarsK
(1) Increase the Z-length by 0.2 (printer settings). and set the first layer bed height to 0.3 (slicer settings).
This will push your nozzle closer to the bed. Do this even if you think you have perfect bed alignment. This will "trick" the printer into really pushing the first print layers onto the bed.
Have a look at these images to understand. To a very rough first approximation, the more pushed into the bed the better bed adhersion. But at a cost of print quality. But get your printer working, then you can start making better print.
I strongly disagree with doing things this way. You should set the first layer in your slicing software, rather than miscalibrating your machine.
The way to get good squish on the first layer is to set your first layer extrusion width to be more than your nozzle width in your slicer. I'm having good results with 0.5-0.7mm while using a 0.4mm nozzle. Don't use a percentage, use a manual extrusion width.
The difference between our approaches is that setting this in your slicer will widen the distance between lines in the first layer, meaning the perfect amount of plastic will be extruded. Your print quality won't suffer.
Doing things by miscalibrating your first layer height will result in a lot of overextrusion, which looks ugly, squishes plastic around the edges of your print, and doesn't give as good an adhesion as just setting the first layer extrusion width properly. You said it yourself: at a cost of print quality. It doesn't have to be that way.
I hope this helps.
Re: almost working December 12, 2015 02:24PM |
Registered: 8 years ago Posts: 31 |
Re: almost working December 12, 2015 07:03PM |
Registered: 8 years ago Posts: 197 |
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DrDoggy
.....one thing that i cant figure out how to get out is how to get that u shape we are seeing across that one diagional (bottom left to top right), but again the g29 should resolve that , no?
Ima head off to the store now, get some acetone and a box, see if that help me any, will update post soon
Re: almost working December 13, 2015 12:23AM |
Registered: 8 years ago Posts: 31 |
Re: almost working December 13, 2015 03:45AM |
Registered: 10 years ago Posts: 14,672 |
Quote
DrDoggy
Another thing that concerns me is the motor that feeds the filimant, it seemed to strip the material alot and i always had to brush it out, so what i did was added a reinforcement post to help the spring, just a notch, so now the motor skips a step when the filiment isnt feeding instead of stripping. but i hear it skip alot , right now i have it at 30mm/s to work does that sound like an ideal speed? would it be smrt to turn the extruder temperature up so it can push out faster?
Re: almost working December 13, 2015 09:17AM |
Registered: 8 years ago Posts: 916 |
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LarsK
Quote
nebbian
The way to get good squish on the first layer is to set your first layer extrusion width to be more than your nozzle width in your slicer. I'm having good results with 0.5-0.7mm while using a 0.4mm nozzle. Don't use a percentage, use a manual extrusion width.
Good points. I have no experience with that approach. I can't seem to find the option in Slic3r? But next time I need Cura I will see about it.
Re: almost working December 13, 2015 01:23PM |
Registered: 9 years ago Posts: 346 |
Re: almost working December 14, 2015 09:44AM |
Registered: 8 years ago Posts: 31 |
Re: almost working December 15, 2015 09:49AM |
Registered: 8 years ago Posts: 916 |
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DrDoggy
Got my first half a$$ print to finish yesterday without any lifting what so ever!! but should be able to perfect next run.
any chance we could post the other slicer settings , i would like to see what you guys use for layers, infill , support and speed.
Re: almost working December 16, 2015 08:41AM |
Registered: 8 years ago Posts: 31 |
Re: almost working December 16, 2015 06:08PM |
Registered: 9 years ago Posts: 346 |