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PostPosted: Wed Mar 26, 2014 10:48 pm 
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Hi all,

For several months I'm using the K8200 printer and want to tell you that I am very satisfied with the device !
It was a pleasure to complete the kit, the Velleman support was great and the printer is ideally suited to tweak.

Below you will find a first picture of the completed printer, including the plexiglass cover. Shortly I'll post some more detailed pictures and a brief explanation about the performed upgrades.

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PostPosted: Thu Mar 27, 2014 9:12 am 
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Nice!


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PostPosted: Thu Mar 27, 2014 9:40 am 
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And here is a high resolution picture of the outstanding print quality (printed with E3D extruder & 0,25 mm nozzle):

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Source: http://www.thingiverse.com/thing:18479


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PostPosted: Tue Apr 01, 2014 11:51 am 
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Here is a short description of the Z-axis modification as applied to my printer:

    Replaced the Z-axis stepper motor mount
    Replaced the standard lead screw with a trapezoidal 13 mm lead screw
    Connected the motor and lead screw with a decent flex coupling
    Replaced the default nut by an appropriate brass drive nut and mounting bracket
    Added a micrometer for adjusting the gap between extruder & printbed

Image

Sources:
http://www.thingiverse.com/thing:234162
http://www.thingiverse.com/thing:167650


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PostPosted: Wed Apr 02, 2014 1:31 pm 
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Looks cool! Prints cool too!
Could you please share the sources of the coupler and the driving shaft?


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PostPosted: Wed Apr 02, 2014 9:07 pm 
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alexnn wrote:
Could you please share the sources of the coupler and the driving shaft?

The flex coupler was ordered from Ebay. Just enter "coupler 3D printer" in the search box and you 'll find several buy it now auctions. Recommended price around 10 euros shipping included. Please note that you order the right diameter !

The spindle and brass bearing was ordered from a company in Roeselare, Belgium. I bought a piece of 1 meter and did shortened the spindle axis on the lathe.

Company info for the spindle and brass bearing:
http://www.gallon.be


Last edited by fitchie on Mon Apr 07, 2014 2:13 pm, edited 1 time in total.

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PostPosted: Thu Apr 03, 2014 12:44 am 
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Another update: white cable loom.

This upgrade is only a visual one because I didn't like the multicolour flat cable.

The original connectors were dismantled and reused to solder the new wiring.
Spiraflex was used to secure the cable harness to the frame.

In additional small heatsinks were glued with epoxy to the stepper motor drivers.

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PostPosted: Fri Apr 04, 2014 8:15 pm 
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Upgrade #3: E3D extruder.

Definitely one of the best upgrades of my K8200 printer is the E3D extruder with a 0,25 mm nozzle.

With the E3D heater cartridge the heating curve on my printer continuous fluctuated between +10° and -10° Celsius of the desired nozzle temperature and sometimes I got the famous brown out reset.

So I'm using back the original Velleman heater cartridge in the E3D hot end. Works perfect !

Image

ED3 website:
http://e3d-online.com


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PostPosted: Sun Apr 06, 2014 9:17 pm 
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Looks very nice! Good idea to get rid of the cheapish diy look from the multicolored cables...
Where did you get the acrylic housing? Custom order or do you have access to a laser cutter?


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PostPosted: Mon Apr 07, 2014 10:06 am 
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defenitly nothing to see with the original K8200... :-(


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PostPosted: Mon Apr 07, 2014 2:22 pm 
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johanwahlberg wrote:
Where did you get the acrylic housing? Custom order or do you have access to a laser cutter?

The housing is a proprietary design, first developed in paperboard. :-)
And the final version was made by Polygone, a company specialised in plastic processing, located near Kortrijk.

Company info:
http://www.polygone.be


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PostPosted: Mon Apr 07, 2014 2:22 pm 
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TB1065 wrote:
defenitly nothing to see with the original K8200... :-(

Surely this printer is a K8200 !
Don 't be fooled by the plexiglass hood: both the mechanics and electronics are completely based on the Velleman kit, only the E3D extruder is foreign.


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PostPosted: Mon Apr 07, 2014 2:44 pm 
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Fitchie,

Yes it is.
He just did a very nice job modifying it.


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PostPosted: Mon Apr 07, 2014 3:06 pm 
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Fantastic !!!

What are yours slic3r settings ?


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PostPosted: Mon Apr 07, 2014 5:47 pm 
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Thanks guys you for your constructive feedback !

Below you'll find the Slic3r settings as used for the high precision prints.
Note that the device is printing at very low speed.

Image

Image

Image


Last edited by fitchie on Mon Apr 07, 2014 11:15 pm, edited 1 time in total.

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