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 Post subject: not sure what's wrong
PostPosted: Sat May 13, 2017 10:27 am 
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Hi,

I'm new to 3d printing and from Germany, so sorry for my bad english in advance.

After assembled the K8600 I'm not able to get a useable result.
I tried printing the priranha and a ring but both very ugly.
piranha
ring

I tried the hints from velleman's support section without improvement.
The belts are ok from my pov. And there is enough oil on the rods.

Maybe anyone here has another idea what I can do to get a better result.


Best regards,
kAy


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PostPosted: Mon May 15, 2017 2:04 pm 
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You should post a picture of the failed print.


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PostPosted: Fri May 19, 2017 8:42 pm 
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Hi,

sorry for the delay. I did nearly a complete reasembly to find the cause.
I believe it's somewhere in the Y-Axis movement parts.

Here a picture of a try to print piranha:
https://goo.gl/photos/7sugQXvYj4kYCTmt9
and one of a ring:
https://goo.gl/photos/BiNfCypx9Q169k2H6

I recorded some videos of a calibration try and movement parts:
https://goo.gl/photos/SpQbxiQ68mdMQbFk8
https://goo.gl/photos/VK44PUfV3BgsfKK17
https://goo.gl/photos/Wo8Q222m4jZ8o6nD7
https://goo.gl/photos/cqKzwb1WdCVwTS566

BR,
Kay


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PostPosted: Sun May 21, 2017 6:10 pm 
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It looks like you nozzle is to close to the bed.
The calibration instructions call for a single sheet of paper.
Try using 3


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PostPosted: Tue May 23, 2017 6:59 pm 
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Thank you for the reply.
I did the calibration a few times, everytime at least a piece of paper was fitting between.
Now also with 3 pieces.

What do you think about the videos?
I think the hotend holder on the Y-Axis is not moving smoothly and stucks.
Any idea what I can do?


Last edited by kAy on Tue May 23, 2017 7:25 pm, edited 1 time in total.

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PostPosted: Tue May 23, 2017 7:22 pm 
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It looks like the fan is not mounted correctly.
Is it rubbing on the plastic holder?
You may want to loosen the belt just a little to see if that helps.


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PostPosted: Tue May 23, 2017 7:24 pm 
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I have used the new procedure to calibrate the Z axis and found that 2 or 3 sheets of paper work better.
I started with 1 then tried 2 and stopped with 3.


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PostPosted: Tue May 23, 2017 7:44 pm 
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Just had another thought.
The pulley that is mounted on the Y axis motor.
Is it rubbing on the motor?
It the belt rubbing on the plastic holder?


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PostPosted: Tue May 23, 2017 7:52 pm 
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Yes, the pulley on the Y-Axis is something I'm wondering about as the belt moves down on the plastic part.


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PostPosted: Tue May 23, 2017 8:02 pm 
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Regarding the fan, I think it is loosen enough. Pls see here:
https://goo.gl/photos/LrYQ6KwkR9z4vgRH6

But the movement of the Y-Axis looks strange to me.
I removed the hotend part and the belt.
But it is still not smooth moving:
https://goo.gl/photos/Uq5dXruRm9yep6zg6


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PostPosted: Tue May 23, 2017 9:20 pm 
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Are the brass or copper (or whatever they are) guides pushed all of the way into the holder?
Do you have any light machine oil to put in them?


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PostPosted: Wed May 24, 2017 9:52 am 
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I have started a blog about my Nano-printer. There you will find my solution to the binding on the y-axis.

http://oz9ny.blogspot.dk/

Happy printing


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