Worn extruder gear...

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Jay_Chandler
Posts: 2
Joined: Fri Sep 14, 2018 8:49 am

Worn extruder gear...

Post by Jay_Chandler » Fri Sep 14, 2018 8:59 am

Hi All,

Apologies if this issue has been addressed elsewhere on the forum already.

I work as a technician at a further education college in the UK, we have five Up Mini 2 and all of them are now having issues extruding filament after a year of moderate use.

Their extruder gears have all been cleaned & their nozzles either cleared or exchanged multiple times, the issue appears to be wear of the extruder gear itself. Our local distributor has provided us with a quote for replacement of the entire hot end/extruder assembly, but as any of you that also work in education will know, funds are limited.

Does anyone here know of a source for the extruder gears only?

Cheers,
Jay.

Tiertime-Elaine
Posts: 143
Joined: Wed Dec 20, 2017 4:23 am

Re: Worn extruder gear...

Post by Tiertime-Elaine » Thu Sep 20, 2018 4:58 am

Hi Jay,

We are sorry that the only way to work this out is that to replace it with the extruder motor with gear or the entire extruder unit.

Because the gear cannot be disassembled from the extruder motor.

Hope above helps a bit.
Elaine

Owen Sparks aka Marksman
Posts: 610
Joined: Tue Mar 15, 2016 9:56 am

Re: Worn extruder gear...

Post by Owen Sparks aka Marksman » Thu Sep 20, 2018 8:56 am

Hi Elaine.

In the UK we pay 240USD for an extruder assembly, this is not a reasonable cost for a 2USD worn out part.

Is this the same for the new range of printers? Running costs are an important consideration when choosing new equipment. If there are now three different extruders then a spare of each (assuming no change in price) would be 720USD, which is rather ridiculous.

If we look at the extruder assembly then worst case we should be able to reuse the housing, pcb, heater, thermistor, nozlle and fan. If the gear is a press fit on the shaft then we replace the stepper and drive gear, but even that seems a bit silly.

If we look at say the Bondtech extruder then the gears are available as replacement parts:-
bondtech-drivegear-kit-175-mm-8mm-val-244226-en.jpg
bondtech-drivegear-kit-175-mm-8mm-val-244226-en.jpg (24.58 KiB) Viewed 2098 times
This drives both sides of the filament, comes apart for service and costs £50USD to replace. (2 gears, shaft and bearing.)


Regards,

Owen S.

Jay_Chandler
Posts: 2
Joined: Fri Sep 14, 2018 8:49 am

Re: Worn extruder gear...

Post by Jay_Chandler » Fri Sep 28, 2018 12:53 pm

Because the gear cannot be disassembled from the extruder motor.
Image

Comments?

Owen Sparks aka Marksman
Posts: 610
Joined: Tue Mar 15, 2016 9:56 am

Re: Worn extruder gear...

Post by Owen Sparks aka Marksman » Mon Oct 01, 2018 6:42 am

I believe there have been 3 versions so far; the newer one does not have a circlip.

Absolute worst case should be a replacement stepper with included gear for $40 including shipping and an apology for designing something that can't be serviced.

Owen S.

Owen Sparks aka Marksman
Posts: 610
Joined: Tue Mar 15, 2016 9:56 am

Re: Worn extruder gear...

Post by Owen Sparks aka Marksman » Tue Oct 02, 2018 6:25 am

This brings up another question.

Steel nozzles are coming (yes really) but does this mean the drive gear or heater block will now be the bit that wears out due to the abrasive nature of carbon loaded filament?

The filament transfer tubes too.

What is the intention here please Tiertime?

Many thanks,

Owen S.

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