My printer does not print well

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charles
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Re: My printer does not print well

Post by charles » Wed Sep 12, 2012 11:45 am

Test to verify the card operation thermostatMK138 with extrunder.
This test measures the temperature inside and outside of the nozzle.
Measuring temperatures within the range of ABS plastic (200-230 ⁰ C.).
ambient temperature: 27⁰C
accuracy:
Image

1)Range01

- Temperature measurement within the nozzle. Range01: 198-205 ⁰ C.

- Outside temperature measuring nozzle. Range0101 : 126-162 ⁰ C.



2) Range02

- Temperature measurement within the nozzle. Range02: 209-216 ⁰ C.

- Measuring temperature outside the nozzle . Range02: 128-160 ⁰ C.






3) Range03

- Temperature measurement within the nozzle. Range03: 223-229 ⁰ C.

- Measuring temperature outside the nozzle . Range03: 142-189 ⁰ C.




These values are correct? In its printers this also happens?
After I will print in 3 temperature ranges.

thanks.

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charles
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Re: My printer does not print well

Post by charles » Wed Sep 12, 2012 11:16 pm

Test Print of abs plastic 3mm, the three ranges:
1. Range 01
- Print:


- flow plastic abs:


- Nozzle after printing:


2) Range 02

- Print:


- Nozzle after printing:


3) Range 03

- Print:


-flow plastic abs:


- Nozzle after printing:


Final state of the teflon tube:
Image

Note: In the videos (range 01 and 02) the motors loses step,but that is not the concern of the moment. I'm worried about the flow of ABS extrunder.

In the video SeeMeCNC flow ABS seems to be very good:
http://www.ustream.tv/recorded/24206897.
You can show the flow of ABS from one of your machines (mode 5%)?

I await the assessment of you SeeMeCNC.
Thanks
Charles

kilroyo
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Re: My printer does not print well

Post by kilroyo » Thu Sep 13, 2012 2:01 am

where did you get your filament?

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charles
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Re: My printer does not print well

Post by charles » Thu Sep 13, 2012 9:53 am


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charles
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Re: My printer does not print well

Post by charles » Fri Sep 14, 2012 8:02 am

Hi,

Manufacturer's guidelines:

a basically print at a highest temp before the ABS is going to degrade.
eg. for the white one about 210 C

Every hot-end is different, you have to try.

thanks
charles

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charles
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Re: My printer does not print well

Post by charles » Fri Sep 14, 2012 5:28 pm

Hi,

I increased the teflon tube 4 mm in order to eliminate any space between the nozzle and teflon. But the problem remained.

Image

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charles
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Re: My printer does not print well

Post by charles » Fri Sep 14, 2012 7:37 pm

I decided to risk something:
Nozzle 2mm and slower speed (far from ideal).
I need help. I need to print to 0.5mm and faster, just like the videos SeeMeCNC.
Temperature: 203-208ºC

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Re: My printer does not print well

Post by tom10122 » Sat Sep 15, 2012 10:56 pm

Not sure if you still have the extrusion problem but is the roller tensioner thing tight enough? (the two allen wrench head screws on the extruder) That did it for me when I switched my filament, for some reason ultimaker filament was somehow thinner then what I was using and it wouldn't extrude , It'd get to the nozzle and start slipping

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charles
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Re: My printer does not print well

Post by charles » Sun Sep 16, 2012 10:50 am

The problem still exists. Even pushing the filament maualmente. I tried several times to adjust these screws, but did not solve the problem. For a larger nozzle 2mm, and adjusting a lower speed solves the problem. A 2mm nozzle serves no project 3D printer. So I have to solve this problem with 3mm filament, to a 0.5mm nozzle, and the speed standard SeeMeCNC.
Thanks.

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charles
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Re: My printer does not print well

Post by charles » Mon Sep 17, 2012 1:08 pm

I'm needing the help of engineers who designed this machine SeeMeCNC.
What should I do?

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stienman
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Re: My printer does not print well

Post by stienman » Mon Sep 17, 2012 2:34 pm

Have you tried a different plastic? I had terrible problems with the first plastic I tried, and when I switched to a different batch everything went smoothly. They were both 3mm ABS plastics, but from different companies with different dyes and, I suspect, different composition.

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charles
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Re: My printer does not print well

Post by charles » Mon Sep 17, 2012 4:04 pm

I need suppliers of ABS plastic indicated by SeeMeCNC.

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Re: My printer does not print well

Post by tom10122 » Mon Sep 17, 2012 4:07 pm

stienman wrote:Have you tried a different plastic? I had terrible problems with the first plastic I tried, and when I switched to a different batch everything went smoothly. They were both 3mm ABS plastics, but from different companies with different dyes and, I suspect, different composition.


Completley forgot about the filament , I bought some 3mm on ebay and it was great, got a free sample from ulitmaker and it just wasn't as good, stopped extruding even without a jam, It just wouldn't work well


http://myworld.ebay.com/protoprinter/&_ ... 1439.l2754 Their PLA is great so I would assume so is their ABS, no affiliation with them other then the fact that I buy from them.

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charles
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Re: My printer does not print well

Post by charles » Mon Sep 17, 2012 7:02 pm

Shipping: $29.12 USPS First Class Mail International
Total Value: $57,12
thanks.
Has anyone bought a plastic ABS good in this list?
http://reprap.org/wiki/Printing_Material_Suppliers

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charles
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Re: My printer does not print well

Post by charles » Tue Sep 18, 2012 5:27 pm

I want to calibrate my printer nozzle 2mm, with my ABS plastic (until the new arrive). I think the flow of plastic for this nozzle (2mm) is good. Would you like ideas calibration.
Thanks

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Re: My printer does not print well

Post by Polygonhell » Tue Sep 18, 2012 6:53 pm

What size nozzle do you have? Is it 0.02" or ~0.5mm or something else?
2mm would be an enormous nozzle
The smallest SeeMeCNC sells is 0.28mm.

FWIW I've never seen the PTFE tube discolor like that at normal temperatures.
If you bought the thermocouple separate from the meter, can you verify your thermocouple is reading close to correct, stick it in the fridge or put it in the oven and verify it reads more or less what you'd expect, it you have the wrong type of thermocouple they read miles off.

The way the cube is coming out in the video looks like you are printing way to hot, or with way too much filament, or possibly your Z calibration is incorrect.
Do the input filament calibration, i.e mark off 50mm of filament, extrude 50mm of filment and verify that's what you get.
Print a single walled test piece, measure the wall thickness, compare to the slicer settings and adjust the extruder steps accordingly.

As for the best plastic, Ultimachine is by far the most consistent I've used, I have perhaps half a dozen reals from them, they have very consistent diameter, and good characteristics, both PLA and ABS.
I also have 3 or 4 rolls from reprapper.com, and it's OK, but I wouldn't recommend it. The filament diameter is extremely inconsistent, which makes getting high quality prints difficult.

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charles
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Re: My printer does not print well

Post by charles » Tue Sep 18, 2012 8:38 pm

The nozzle of 2mm (huge) was that I did (test). I had an extra nozzle SeeMeCNC and used a drill to make the hole. 2mm flow is good. Even so I reduced the speed of the motors. The teflon darkened because I realized the setting and measuring of temperature on the outside of the nozzle, which is not good. It is wise to perform the measurement on the inside of the nozzle, as I showed in the following videos. After that, I had no problems darkening of teflon.
I will try to adjust with the nozzle of 2mm. After return to the smaller diameter.
I'll do some tests that you suggested.
thanks.

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charles
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Re: My printer does not print well

Post by charles » Tue Sep 18, 2012 8:45 pm

I have 0.5mm and 0.36mm nozzle to plastic ABS(3mm)

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Re: My printer does not print well

Post by tom10122 » Wed Sep 19, 2012 8:12 pm

Honestly , don't bother with the 2mm It serves no use, Check your heating resistors ,also , what diameter is your teflon tube?

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