1 Topic by englewood82 (edited by englewood82 2016-12-31 12:28:17)

  • englewood82
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Topic: Bendng at corners.

Hello all,

I have bought myself a Davinci JR 3D printer for some projects I'm trying to make.

I seem to have a problem with the corners of the bottom on each print, they bend up and don't stay flat on the bed and after so long they bend up so far that the rail hits the comer and knocks the part and the print goes very wrong.

How can I over come this?

Do I need to make the bed hotter?
Do I need to use some glue to keep the part stuck down on the corners?

I've seen what a raft and a brim can do, so ill try these.

I'm not happy, if this continues ill be sending the printer back fro a refund.

Thanks

2 Reply by Tin Falcon

  • Tin Falcon
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Re: Bendng at corners.

I'm not happy, if this continues ill be sending the printer back fro a refund.

Even after 2 + years I occasionally have first layer adhesion issues.Time to really clean the bed. 

3D printing is not for the faint of heart or faint of mind. It takes patience ,perseverance and sometimes a bit of Perspiration. Do your homework and learn what it takes to succeed.
The media hype of make things with the push of a button is to be nice just hype.

Your issue is common and I expect almost all  first time operators struggle with first layer issues.
I say most because I am fortunate to have a friend who is a 3d printing expert/professional to help me get started with great advise. That said proper machine tuning is a must.

First of all tram the bed
second of all you may need to use hairspay or glue stick on the bed
you may also need to slow down the first print layer.

This link should help you sort out common problem

https://www.simplify3d.com/support/prin … eshooting/

Soliddoodle 4 stock w glass bed------Folger Tech Prusa 2020 upgraded to and titan /aero extruder mirror bed
FT5 with titan/ E3D Aero------MP mini select w glass bed
MP Utimate maker pro-W bondtech extruder
Marlin/Repetier Host/ Slic3r and Cura

3 Reply by englewood82 (edited by englewood82 2016-12-31 13:14:54)

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Re: Bendng at corners.

Yes sorry I was just annoyed with 10 tried prints and the warping.

I have disabled the back fan and tried a brim and ill try the other options from the link you sent.

Is it possible to set the temp on the bed with JR?

I'm printing directly to the sheet of adhesive that comes with the printer

4 Reply by Tin Falcon

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Re: Bendng at corners.

Yes sorry I was just annoyed with 10 tried prints and the warping.

of course you were ! Not knowing what to fix or how to fix it is frustrating. But there are forums like this one that you can get help!!!! I would be frustrated with 10 bad prints in a row as well.

I'm printing directly to the sheet of adhesive that comes with the printer

Also dust can be your enemy you may want to clean the bed with alcohol or acetone.
Another option is use blue painters tape.

I learned to print on window glass coated with aqua net hair spray. Borosilicate glass is better but 10 time s the money vs window glass.  Some folks like Elmers glue stick,
Adding glass may require you to move or adjust the z limit switch.

Is it possible to set the temp on the bed with JR?

I do not know ,hopefully a Jr owner can chime in.

the Jr is a pla machine so pla benefits from a layer fan  and ventilation . So air flow is good for prints.
Can you print with the door open?

Tin

Soliddoodle 4 stock w glass bed------Folger Tech Prusa 2020 upgraded to and titan /aero extruder mirror bed
FT5 with titan/ E3D Aero------MP mini select w glass bed
MP Utimate maker pro-W bondtech extruder
Marlin/Repetier Host/ Slic3r and Cura

5 Reply by englewood82

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Re: Bendng at corners.

Okay managed to do a good half print and now a clunking sound as the filament will not load!.

Seems to be stuck, this printer is a day old.

I can print with the door open.

6 Reply by Tin Falcon (edited by Tin Falcon 2016-12-31 15:36:01)

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Re: Bendng at corners.

The filament may be tangled first place to check.  Does it pull freely?

Soliddoodle 4 stock w glass bed------Folger Tech Prusa 2020 upgraded to and titan /aero extruder mirror bed
FT5 with titan/ E3D Aero------MP mini select w glass bed
MP Utimate maker pro-W bondtech extruder
Marlin/Repetier Host/ Slic3r and Cura

7 Reply by englewood82

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Re: Bendng at corners.

I've managed to get it unblocked, was stuck in the feed gears somehow

Nightmare, lets see what happens next.

8 Reply by scobo

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Re: Bendng at corners.

englewood82 wrote:

I've managed to get it unblocked, was stuck in the feed gears somehow

Nightmare, lets see what happens next.

Welcome to 3D printing ! big_smile

Davinci 1.0 with repetier firmware & E3D V6 Lite
Anycubic Photon DLP printer, Einscan-S 3D scanner
Simplify3d, 123D Design, Meshmixer
http://www.thingiverse.com/scobo/designs

9 Reply by Bozotclown1970

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Re: Bendng at corners.

scobo wrote:
englewood82 wrote:

I've managed to get it unblocked, was stuck in the feed gears somehow

Nightmare, lets see what happens next.

Welcome to 3D printing ! big_smile


Scobo is correct, it's a bit of a challenge until you figure it out.

Ok, I have a JR also. I did a few mods on it and now it works pretty well. The first thing to check would be if the bed is level. I had to print a shim to put under the right hand side of the rod the hot end rides on to make that happen.

Next you need to make sure that you have the Z axis set at the correct height. You can take two pieces of paper, lay them down on the bed, now set your Z setting in the menu. The paper should pull out with just a little friction. Check the complete be to make sure it is level.

I added "PRINTinZ Skin 3D Printer Bed Surface" to my print bed to help in removing my prints. This was only $10.25.

Lastly is changed out my filament stepper motor. This was probably the best mod I did. I no longer have any clunking/grinding noise from it.

If you have any further questions, feel free to contact me.

10 Reply by Tin Falcon

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Re: Bendng at corners.

The reality is any $250 3d printer will have challenges.I have  a kit build that cost about the same money then added upgrades. Then i had to invest time in the build I considered it education, cheaper than a course at a county college.   
The question comes up what is the best printer to start with. And there are many answers.
So in an ideal situation we research for the best printer. Then we buy one and the reality sets in. And then its not about choosing a printer but learning how to use the printer that was chosen.
Welcome to the adventure.
Tin

Soliddoodle 4 stock w glass bed------Folger Tech Prusa 2020 upgraded to and titan /aero extruder mirror bed
FT5 with titan/ E3D Aero------MP mini select w glass bed
MP Utimate maker pro-W bondtech extruder
Marlin/Repetier Host/ Slic3r and Cura

11 Reply by englewood82 (edited by englewood82 2017-01-01 14:14:40)

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Re: Bendng at corners.

The bed is level as my prints are fine until the stupid filament gets stuck!!.

So after 3 prints of 2 hours each print has failed half way or just over due  to the filament getting stuck in the gears.

Do they actually test these before they are shipped, I shouldn't have spend any more cash on something that is brand new buying new gears ect ect.

They should repair the faults for free, its 2 days old now and I've managed to do 2 small prints.

If you bought a new car and went don't the road on the 2nd day and they gears failed, okay ill just spend £5000 on some gears!.

I can see why it only has a 90 day warranty!.

Ill see how it goes for a few days, if not I'm taking my money back and ill buy a better version!.

12 Reply by Tin Falcon

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Re: Bendng at corners.

Ill see how it goes for a few days, if not I'm taking my money back and ill buy a better version!.

Well that may be the best choice  . Hate to see you give up too easy but on the other hand why get stuck with a lemon if you have one and can get a refund towards a better printer.

Do they actually test these before they are shipped,

I expect a few quality checks but probably not a long print.

Sounds like the exdtruder motor may be over driven and over heating.


If you look at this from the consumer side  yes the thing should work out of the box and for at least a year.
Now from the business side.
A good quality name brand well engineered 3d printer will retail for around $2500 USD.
And we all know that is a bit high for most of the home hobby market. And even $500 is not pocket money for most people. So how does one put a printer on the market for 10% the cost of a good printer? Profit from  filament sales by nfc tags is part of it. Mass production mass sales helps but the bottom line is quality for the product will suffer. There is no or little money for quality control at any level and they have to source the cheapest parts and keep assembly cost to a minimum.
The old adage you get what you pay for. Unfortunately the customer is lead to believe they are getting plug and play and in many cases you get a pre assembled kit that needs tuning and set up.
And like i mentioned earlier a kit of parts is hard to find cheaper than a davinci Jr.

Good luck we are here to help.
Tin

Soliddoodle 4 stock w glass bed------Folger Tech Prusa 2020 upgraded to and titan /aero extruder mirror bed
FT5 with titan/ E3D Aero------MP mini select w glass bed
MP Utimate maker pro-W bondtech extruder
Marlin/Repetier Host/ Slic3r and Cura

13 Reply by englewood82

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Re: Bendng at corners.

So frustrating though, I like the design,

My tube feeder keeps popping off after so long. this has happened a few times, I've just put the spare nozzle on.

The black grommet keep popping off on the one that was pre-installed, so ill see what happens yet again.

14 Reply by englewood82

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Re: Bendng at corners.

After another 3 failed attempts of printing due to the filament getting stuck, I've decided to return this printer,

Ill be buying a Flash forge Finder the end of the month :-)

But the Brim did work the best for bending at the corners :-)

15 Reply by willthiswork89

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Re: Bendng at corners.

i use blue painters tape and have zero adhesion issues. the expensive scotch blue painters tape.

16 Reply by elikes3d (edited by elikes3d 2017-06-11 03:22:22)

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Re: Bendng at corners.

Tin Falcon wrote:

The reality is any $250 3d printer will have challenges.I have  a kit build that cost about the same money then added upgrades. Then i had to invest time in the build I considered it education, cheaper than a course at a county college.   
The question comes up what is the best printer to start with. And there are many answers.
So in an ideal situation we research for the best printer. Then we buy one and the reality sets in. And then its not about choosing a printer but learning how to use the printer that was chosen.
Welcome to the adventure.
Tin

Yeah for a 3d printer that's pretty cheap. I don't think even today (Jut noticed the age of the thread) we have a printer that is in that range and does a good job. For now, just visit your local university or college to use a good quality printer. A lot of them have them now.