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Filament getting massively tangled around gear in extruders on purge-retract script
#21
@kodachrome

We are very sorry about the damage you are experiencing with the extruders. I am not sure why this is happening as none of the parts have ever come close to breaking during months of extensive testing. Please send us an email at: info(at)distechautomation(dot)com with pictures of the extruders and any damage that you mentioned and we will sort it out ASAP. Thanks! Once again, we apologize for the inconvenience.
 
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#22
We had to make some tweaks to the tolerances so that the ProStruder STLs could be 3D printed. Here is the link to Thingiverse:

https://www.thingiverse.com/thing:2550225

Let us know if any of the parts have tolerance issues so we can adjust them accordingly!
 
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#23
Excellent, thanks! Ive now printed replacements out of PETG, which for all its issues simply wont crack like acrylic. It has a strong bond and natural flex to it, perfect (IMO) for this application, though not quite as attractive as Acrylic!

Ive also posted my mod to the bearings on the hinge which seems much more friendly to the filament's I'm using:
http://distechforum.com/showthread.php?tid=141

Next up, my mod to Rostock arms to allow direct placement of the Prostruders on the arms (ie on 2 arms) as opposed the regular "flying mount" setup which introduced so many weird problems for me.
 
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#24
Hey Kodachrome,

Would this mount I modified for my delta work for you?

https://www.thingiverse.com/thing:2109127

J.
Jay's 3D Adventure
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#25
Very interesting! That appears to be mounted stationary, to one of the towers (and not on the carriage) right ?
The Rostock uses all sides of those towers unfortunately for the carriages to move up and down on:
https://www.seemecnc.com/products/inject...rriage-set

The big problem Im having with the flying mount config and the prostuders is the weight of them.. they are too heavy to mount either in a floating mount above (connected to all 3 arms) or individually on the arms directly. At least I think they are as now when printing its all going great then one of the arms slips I guess and it shoots way out of bounds and ends up printing diagonally in the air.

SeeMeCNC's own Y-splitter extruder system mounts the 2nd EZ Struder to the top frame (and therefore doing nothing for the hysteresis in the bowden cable problem) and does not put the weight on the arms at all. Which makes me think you cannot do a flying mount on a Rostock with more than one extruder. Also the EZ Struder is half the weight of these ProStuders!
 
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#26
(09-24-2017, 09:56 AM)kodachrome Wrote: Very interesting! That appears to be mounted stationary, to one of the towers (and not on the carriage) right ?
The Rostock uses all sides of those towers unfortunately for the carriages to move up and down on:
https://www.seemecnc.com/products/inject...rriage-set

The big problem Im having with the flying mount config and the prostuders is the weight of them.. they are too heavy to mount either in a floating mount above (connected to all 3 arms) or individually on the arms directly. At least I think they are as now when printing its all going great then one of the arms slips I guess and it shoots way out of bounds and ends up printing diagonally in the air.

SeeMeCNC's own Y-splitter extruder system mounts the 2nd EZ Struder to the top frame (and therefore doing nothing for the hysteresis in the bowden cable problem) and does not put the weight on the arms at all. Which makes me think you cannot do a flying mount on a Rostock with more than one extruder. Also the EZ Struder is half the weight of these ProStuders!

Oh I wasn't aware of how your printer used the towers but yes my mount is on the tower and not the carriage.

SeeMeCNC's EZ Struder uses Nema 17 size steppers which aren't geared, so that's the weight saving I guess. I was looking on the BondTech site earlier and they have an stl for a Rostock mount which should fit the geared steppers.

I only have a smallish size delta so the flying extruder setup was never an option.
Jay's 3D Adventure
Twitter:
twitter.com/Jays3DAdventure
Instagram:
instagram.com/jays_3d_adventure/
YouTube:
t.co/GesyvQVrZP
 
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#27
Just to update here, had to print a replacement hinge for the one I glued. Distech, you really need to ditch acrylic for this, it shatters after any decent usage. I was using PLA and HIPS exclusively for the last 3mths.
My own PETG printed hinge in the other extruder is still flying along. Virtually all the acrylic parts have cracked now, hinges being the critical failure.
 
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