not printing right

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evanr
Posts: 101
Joined: Thu Nov 29, 2012 3:09 am

Re: not printing right

Post by evanr »

gfeliksdal wrote:Hi Evan,

Please double check the opto-sensors. You could try to reflow the solder joints of them to make sure they don't have an iffy contact. Also make sure the cables are ok and also the cable ends have firm contact with the connectors/screw terminals. If all that doesn't work, I think parts need to be replaced. Starting with the opto sensor and ramps board. Also the required reflashing doesn't seem right. Actually I never had to reflash any of my printers more than once.

Kind regards,

Guillaume
ok, I'll look into this.
BTW, I just printed the exact same part two more times and no problems.
I'll note when the part-shift happens again...

evanr
Posts: 101
Joined: Thu Nov 29, 2012 3:09 am

Post by evanr »

.... more problems.
Things never really seem to print all that well from day one.

My parts are looking like junk, again.
Another part shifted when printing, just as in my previous post.
Flat parts are now patchy, with missing sections (as in the attached pictures).

Hardware seems good soldering, wires, connections etc...
Works well, then doesn't.

I have a feeling it is the firmware or the software.
Something is not compatible with my system?
Latest Repetie .83 homes but doesn't print.
Repetier .7 works but doesn't print well
New firmware works better than the last....... for how long??

I tried to slice with Slic3r but the print was much more worse than Sfact.

Is there a way to adjust firmware settings?
Anything I can change?
Why are there so many issues??
Attachments
MISSING SECTIONS, DIDN'T PRINT IT?
MISSING SECTIONS, DIDN'T PRINT IT?
MISSING SECTIONS
MISSING SECTIONS

Kjetilei
Posts: 334
Joined: Fri Mar 16, 2012 8:26 pm
Location: Stavanger, Norway

Post by Kjetilei »

Hi evanr,

This looks like too little filament is extruded and I wonder if it is due to one of the following reasons:
- extruder insert piece is not gripping the filament firmly enough - try to grip the filament by hand and see if the extruder insert piece is pulling the filament firmly - the stepper should start skipping instead of the filament being "chewed up" by the extruder insert piece. It could also be a problem with the tensioning ball bearing not rotating freely
- the hot end is partially blocked resulting in too much pressure needed - have you tried to take out the hothend, warm it up to extruding temperature and hand feed the filament? It should be relatively easy to get an even flow without too much pressure (difficult to explain exactly)

Your prints look quite similar to how my prints looked when a small design fault in my dual extruder design prohibited the tensioning arm from pushing the filament firmly against the extruder insert piece.

hvdd
Posts: 71
Joined: Tue Jul 24, 2012 11:43 pm

Post by hvdd »

i use repetier 0.83 as well, on one pc it works fine, on another one it will not print.
check the G-code file , in the start part - remove everything and save it.
for a few days i see the same problems as you have... solved now..
heat up to normal temp (200°c) - stop motor button..
then you can push the filament though the extruder like Kjetilei explains, check the stepper and bearing is running.
if no filament is comming out or a very thin wire then i use 1 wire from a small steelbrush and push it into the extruder head.
maybe some dust into the head and blocking the extruder.
the only remark i have on 0.83 is , at the end of the G code you see E-10...
if you printed a part at the end the filament will retract 10 mm, this is to much, the hot filament will go above the isolator of the
extruder and cool down into the top part. the next time you print the filament is blocked into the top alu part and will not pass
the isolator. replace the g-code file at the end E-10 replaced with E-2 . my problem solved ! maybe a hint ??

Trnquill
Posts: 66
Joined: Fri Oct 05, 2012 10:01 am

Post by Trnquill »

The gaps in the print are most likely caused by blocked hot end. Clean it really well! I would advice using a guitar string or any other rigid and thin piece of metal wire to "flush" the hot end while it's hot.

I had missing steps, also. The remedy was fine tuning the stepper motors until the lost steps were gone.

evanr
Posts: 101
Joined: Thu Nov 29, 2012 3:09 am

Post by evanr »

I have a tradeshow in 1 day and the problem still persists.
Now I don't have enough prototypes to display to potential customers.

Attached is another picture.
- I adjusted the extruder screw & extruder pot meter screw.
- used a .33mm guitar wire to floss the extruder tip.
- took the extruder head out of casing and fed filament by hand, no problem.

And still, the problem persists.

Then I did a test print with the 40x10 and it also looks like junk.

"Frustrating" would be a kind word to use to describe my situation.

..... any help appreciated!
Attachments
TEST PRINT 40X10, DOESN'T LOOK GOOD
TEST PRINT 40X10, DOESN'T LOOK GOOD
PRINTING 2ND LAYER AND FIRST IS MISSING A SECTION
PRINTING 2ND LAYER AND FIRST IS MISSING A SECTION

Kjetilei
Posts: 334
Joined: Fri Mar 16, 2012 8:26 pm
Location: Stavanger, Norway

Post by Kjetilei »

evanr: is the sound from the extruder stepper even If you print in free air or does it stumble? You might try to print a 10cm single wall square cylinder to listen for uneven stepper sound
Do you get filament "dust" on the extruder insert piece/tensioning ball bearing when extruding? If so is the tensioning mechanism tight enough?

A few suggestions (some purely wild guesses) that don't require a hot end teardown:
- try to print on blue painters tape instead of directly on Kapton
- try to print with a low temperature (180-185 and 55)
- try to print with a higher temperature (195-210 and 60)
- try to increase Flow multiply in Repetier (150%-160%)
- try to experiment with both lower and higher speed multiply

Let us know about your progress and helpfully more can step in with advice if you still struggle then.

Fingers crossed!

evanr
Posts: 101
Joined: Thu Nov 29, 2012 3:09 am

Post by evanr »

first off, thank you for all the help!

The extruder does not stumble when it is extruding in free air, it is perfect.
I can hold the filament and the extruder wheel is tight enough to grab/feed and extrude.

I'll have to resume this next week, I'm on a plane in a few hours headed for the tradeshow in Chicago.
Unfortunately, the parts I have posted are the ones I will be taking to the show for display.
Not good.... I hope I don't lose business because of this.

Guillaume:
If the problem is indeed with the Arduino board as you say,
I can't see why I should have to be the one to pay for a replacement?
... it is not even 3m old.
There must be some sort of warranty you offer or replacement?

I must say, I am disappointed with my Felix.
All the time and money I have spent....
It has not performed and does not seem to be reliable.
This printer has let me down.

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gfeliksdal
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Posts: 405
Joined: Sat Feb 25, 2012 10:40 pm
Location: Netherlands
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Post by gfeliksdal »

Hi Evan,

Sorry that I haven't replied earlier, I just see this post. It sucks that you have so much trouble with the printer. If it is a case of warranty with your arduino board, I'll refund it. Please send an email to info at felixprinters dot com and I'll send you a new board asap. I hope you didn't lose any customers with the bad prints.

Kind regards,

Guillaume

evanr
Posts: 101
Joined: Thu Nov 29, 2012 3:09 am

Post by evanr »

Hi All,

I received the new Arduino board.
Thank you guillaume!

Everything is set up and the firmware/driver/software all seem to be working well.

But, my test print seems to only print well on one side.
Please see image.

Also, I can't seem to adjust the extruder & bed temp.
It keeps creating its own values and prints at 185 & 65bed.
How/where can I override the values?

thanks.
Attachments
40X10 TEST PRINT - ONE SIDE PRINTS WELL, THE OTHER DOESN'T
40X10 TEST PRINT - ONE SIDE PRINTS WELL, THE OTHER DOESN'T

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