Video of threaded rod vs trapezoid spindle on Z axis

K8200 3D Printer K8200 - Your printer, creations, and ideas for imp
1

I recently upgraded from the standard threaded rod to a trapezoid spindle.

The difference is striking:

https://www.youtube.com/watch?v=q4rkGCtvFEA

2

I am using Tr10/2.

Could you tell me type of your coupling and price ?

3

My spindle is TR8x1.5, the coupler is 8/5mm and was around 5 euros on Eb…

Edit: I’ve updated my blog post to add Eb… article numbers:

http://zlab.io/2014/09/05/adding-a-trapezoid-spindle-to-k8200-3d-printer-z-axis/

4

Print sample, threaded rod left, spindle right:

High-res image and more details at http://zlab.io

5

Thanks. I bought coupler now too. I am using Tr10/2 on both ends changed to 8mm (and I plan add next Tr10/2 + belt on left side).

The floating bear has some number ?

6

The upper bearing is the original ID 8mm that came with the printer.

7

Ok. Thanks.
I read on your web about plan a next fan. I think, better is use thingiverse.com/thing:174247

8

Hi, I’m going to replace the standard spindle with a TR8x1.5 too.
I’ve got hexagonal nuts. As they do not snug fit onto the spindle,
is there a need for an anti backlash extension to the nut holder?

Eddy

9

My nut has some play too, that’s normal or otherwise the spindle and nut would jam. I wouldn’t worry about backlash; gravity pulls the the extruder arm downwards and all movement is upwards during printing.

10

Thank you for your info.
So I can start now :slight_smile:

11

Can I to have some questions ? I am beginer and on this forum people do not answer so much…

  1. why is X-step and Y-step 64.25 ?
    3200steps/1 rotate … used T5 and T05/10 => 3200/(5*10) = 64 step/mm

Why is there in firmware for X and Y added 0.25 step/mm ?

  1. do you measure always diameter of filament or do you using 3mm and all you correcting with extruder multiplier ?
    I cannot calibrate well…
    I am using 810.81 steps for extruder in EPROM ( i am using 2 wheels T2.5 (12 and 60) and T2.5 bell … less noise and can retract 65mm well now)

I am using 2,92 diameter, then I slice cube 30mm as I found link on your pages. Multiplier = 1, slicer using perimeters extrusion width: 0.43. I measure 1.06mm => 20.43 / (11.05) = > 0.819 … new multiplier
Then I print new cube … now I measure cca 0.89

Now as I saw on pages for new cout: 20.43 / (0.8190.89) => 1.17 ???

And how set there in Printer setting in Slicer item Advanced ? There is 170% for perimeters. Why ? For calibration it must be set to 100% ?

12

  1. I think that’s to compensate for backlash of the belt but I’m not sure

  2. I’m still with the original gear and haven’t change the extruder steps. I have filament at 3mm. Right now all I’ve changed is the 0.95 multiplier which gives good results wrt surface quality. Still reading up on this: http://manual.slic3r.org/advanced/flow-math