PSA: Purge mechanism not skelestruder compatible  

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vintagepc
(@vintagepc64)
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19/11/2019 11:33 pm  

I'm running a Mk3S with a skelestruder and unfortunately the purge mechanism is not compatible with it; the activation might work OK but the bottom of the mechanism hits the Z motor mount before the nozzle is close enough to the bed. Doesn't look like there's much room for changes to the mechanism so a revised z-mount might be required.


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BigBrain3D
(@bigbrain3d)
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21/11/2019 2:36 pm  

Do you have a 3D model of the assembly? It might be easy enough to adjust the z height of the purge mechanism as long as the nozzle is not more forward or back compared to the standard i3.


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vintagepc
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21/11/2019 10:45 pm  

I believe there is a STEP zip in the Thingiverse files, at the very bottom.

Y position should be the same, I believe it's inline with R4 parts/Mk3S

https://www.thingiverse.com/thing:2845416/files


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BigBrain3D
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22/11/2019 1:28 pm  

@vintagepc64

Sorry, I meant do you have a 3D model of your skelestuder setup? Or is it just the z height of the RPM that must be adjusted? If so, How much does it need to be moved up?


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vintagepc
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23/11/2019 2:26 pm  

Looks like it may just be the height. I'll do some experiments this weekend and report back what I find.


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vintagepc
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24/11/2019 1:14 am  

Update: It is not; there are other interferences with the PINDA and fan shroud that will need to be taken into account. I'll follow up with a CAD model of the assembly.


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vintagepc
(@vintagepc64)
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24/11/2019 1:26 am  

Here's an F360 skelestruder model. Motor mounts to the blue part with the ridges, I just don't have a NEMA17 reference file on hand.

This post was modified 3 weeks ago 2 times by vintagepc

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BigBrain3D
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26/11/2019 1:31 pm  

@vintagepc64

Give us a bit of time and well check this out.


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BigBrain3D
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26/11/2019 1:35 pm  

@vintagepc64

Is it possible for you to export the file in STEP format? We use Autodesk Inventor for all our modelling and it cannot open the Fusion 360 format.


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vintagepc
(@vintagepc64)
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26/11/2019 1:47 pm  

I can do that tonight; but for faster turnaround there is a non-assembled zip of STEP components available here:

https://cdn.thingiverse.com/assets/1a/66/83/a6/52/SP_r1b_step.zip

Assembly instructions here (took me ~30 min to assemble the parts in F360 previously). 

https://jltxplore.dozuki.com/Guide/4.+Assembly/5?lang=en

Let me know if you need me to re-export the partial assembly tonight; or if you have any questions. 


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vintagepc
(@vintagepc64)
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26/11/2019 2:19 pm  

Oh, and as noted in my other post - if I can get this mechanism working on my setup I'm more than happy to update and share my purge bucket post-processing script for PrusaSlicer.  🙂


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BigBrain3D
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27/11/2019 2:25 pm  

@vintagepc64

Yes if you could please send the partial assembly as a step file that would be very helpful. Thank you for the photos too.


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vintagepc
(@vintagepc64)
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27/11/2019 2:32 pm  

Sure, here you go.


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