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PostPosted: Fri Nov 22, 2013 11:05 pm 
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Hello everybody.

I had done some good modifications on my 3D-Printer (K8200), like working LCD Display with SD-Card and Encoder.
I change to trapezoidal spindle and also added a second one on the right side of the printer.
Firmware was changed to repetier 0.83, there i have updated several things so that the controller board can work.
I also added a menue point that i can switch a LED Strip on and off, over the controller and display.

Image
Image
Image

Best regards,
DCM


Last edited by DCM on Mon May 05, 2014 11:46 pm, edited 1 time in total.

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PostPosted: Sat Nov 23, 2013 9:50 am 
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Location: La Louvière (Belgium)
WOOWWW
Look terrific.
great job


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PostPosted: Sat Nov 23, 2013 10:41 am 
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Very nice job!!

Could you post a close-up picture of the right carriage (and perhaps the STL file)?
Did you plug the 2 motors to the same controller?


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PostPosted: Sat Nov 23, 2013 12:57 pm 
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Sweet
Could you post some pictures of your print outs?


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PostPosted: Sat Nov 23, 2013 7:14 pm 
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Nice! In addition to the previous posters I have some more questions.
- What trapezoid did you use?
- Did you have to modify the Arduino code because of the trapezoid?

Your design looks like the other design here :
http://forum.velleman.eu/viewtopic.php?f=53&t=9886#p41185
I was wondering whether the stepper motors in these dual Z-axis designs will always stay in sync.
I would not assume they will do so which can result in torsion and so.
Any thought of people in the forum about that?

Robert


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PostPosted: Sun Nov 24, 2013 7:42 pm 
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Hello thank you for all remarks.

Yes i have both Z-Motors on the same controller, you have to use a additional heatsink on the Stepper IC and it would be
better when you use also a fan. I have heatsinks on each Stepper controller assembled.
Now i have to print a new case for the electronic with a cooling fan inside.

For the sync of both Z-axis, this is not a problem because they are on the same controller.
The only thing you have to do is measuring the alu-profil height (where the Extruder is mounted) on the left and the right side.
Also you have to check that both spindle are going free from beginnig to the end. Otherwise maybe one of the motor could lose some steps.

I had to modify the firmware because i use TR8x1,5 Spindle. The old M8 Spindle is 1,25 per rotation.

Thanks
DCM


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PostPosted: Tue Nov 26, 2013 6:52 am 
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Hello,

i also updated the heatbed with additional powersupply. (24V/6A)
I designed a PCB and have printed a case for it.
I will post it as soon as possible.

Best regards,
DCM


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PostPosted: Wed Nov 27, 2013 9:18 pm 
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Here are some additional pic's.

The right side Trapezoid.
Image

The Headbed Schematic.
Image
There i used the same components as on the Printer mainboard.

The PCB-Test.
Image


The Headbed Case.
Image
Image

Hope you enjoy :-)

Best regards,
DCM


Last edited by DCM on Fri Nov 29, 2013 11:22 pm, edited 1 time in total.

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PostPosted: Wed Nov 27, 2013 9:26 pm 
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Nice design. Where did you purchase the rods?
And what kind of guide did you use? On the picture it looks trapezoidal.


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PostPosted: Wed Nov 27, 2013 9:51 pm 
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I purchased all on eb.. :-)
Yes it's trapezoidal.

DCM


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PostPosted: Fri Nov 29, 2013 3:34 pm 
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Im only asking the question but what improvements have you seen using the twin Z axis motors?

Im strugling to get my mind around it, to deem it worthwhile? nethertheless great job.


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PostPosted: Fri Nov 29, 2013 7:32 pm 
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Location: Geel, Belgium
Just building mine but I noticed that the z-axis tends to stutter a tad when only driven on one side. Above mods should solve that completely.


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PostPosted: Fri Nov 29, 2013 11:43 pm 
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Simple Answer why i have added a second Trapezoid on the right side.

I have seen that the Z-Axis (Aluprofil where Hotend is mounted) is wobbling when the
printer desk is moving fast. Mostly when i print somthing really thin (approx. 2mm) and the
Printer is working on the infill. Also the original 8mm Bearing on the right side is not so good.
You can move the Profil not only up and down (only without second Spindle), also to the front- and backside a little bit.
This are all bad things and you can see it in your printouts.

This upgrade was not really expensive, but it is a good investment when you want better printouts.
Everyone should make this upgrade and you will be very happy with your K8200. :-)

Best regards,
DCM


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PostPosted: Mon Dec 02, 2013 11:20 pm 
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i´ve seen your Rebuild to give the K8200 a second Z-axis motor. It looks truly very impressively.
Maybe you can give us a Construction manual, so i can give this to my K8200 too?
And maybe a list where to buy these stuff?
Best Regards
seefew


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PostPosted: Tue Dec 03, 2013 2:06 pm 
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Hi DCM,

Probably you had to change the firmware, because of the new Tr8 spindle.
I'm new and can you tell me what you have done?


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