1 Topic by JustSomeGuyTN

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Topic: Question about mk4 extruder replacement and loseness

When my hot end clogged last time I decided to go ahead and get a mk4 extruder replacement.  I used Shapeways to have the extruder made and I ordered a new hot end from Solidoodle.  Since it was too expensive I also ordered a replacement jigsaw extruder just in case.  My original jigsaw is cracked in a bunch of places.  The mk4 looked great from shapeways but the hot end seems a little loose in it's slot.  I was thinking about wrapping some tape around the black hot end tube to give it a little more tight fit.  The first print I made with it turned out ok but seems to have some weird sides.  I will print out a cube next and try to post a picture.  Has anyone else had issue with the hotend moving in the mk4?

2 Reply by nickythegreek

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Re: Question about mk4 extruder replacement and loseness

Can we got some pics of the shapways printed mk4? I want to see how nice they came out!  I think there might be a shim you can print (or just reprint the part that is loose) if you can make it through a print.

3 Reply by cmetzel

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Re: Question about mk4 extruder replacement and loseness

I think what you're seeing is a difference in technology.  Our printers have a little more ooze than the shapeways printers.  When tek/lawsy did the mk4 they almost certainly took this into consideration and sized it appropriately so it would fit the peek barrel.

4 Reply by JustSomeGuyTN

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Re: Question about mk4 extruder replacement and loseness

cmetzel,

  That's what I started to think too.  Tonight when I get home I'm going to try wrapping a bit of tape around the hot end to get the tighter fit.

cmetzel wrote:

I think what you're seeing is a difference in technology.  Our printers have a little more ooze than the shapeways printers.  When tek/lawsy did the mk4 they almost certainly took this into consideration and sized it appropriately so it would fit the peek barrel.

5 Reply by lawsy

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Re: Question about mk4 extruder replacement and loseness

The shapeways as cmetzel said is probably a bitter smaller and more accurate. Your tape idea sounds good as a fix.

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6 Reply by JustSomeGuyTN

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Re: Question about mk4 extruder replacement and loseness

Nicky,

Here's a pic

nickythegreek wrote:

Can we got some pics of the shapways printed mk4? I want to see how nice they came out!  I think there might be a shim you can print (or just reprint the part that is loose) if you can make it through a print.

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7 Reply by cmetzel

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Re: Question about mk4 extruder replacement and loseness

Looks good!  How much was it at Shapeways if you don't mind my asking?

8 Reply by JustSomeGuyTN

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Re: Question about mk4 extruder replacement and loseness

It was 50.99 including shipping.  But that is including the tensioner arm and both versions of the add on retainer which I'm not using.

cmetzel wrote:

Looks good!  How much was it at Shapeways if you don't mind my asking?

9 Reply by elmoret

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Re: Question about mk4 extruder replacement and loseness

JustSomeGuyTN wrote:

It was 50.99 including shipping.  But that is including the tensioner arm and both versions of the add on retainer which I'm not using.

I'm in the wrong business. I've been printing and shipping MK4s for free!

Filastruder - the robust, inexpensive filament extruder
E3Dv6 All Metal Hotend - the premier 3D printing hotend

10 Reply by cmetzel

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Re: Question about mk4 extruder replacement and loseness

JustSomeGuyTN wrote:

It was 50.99 including shipping.  But that is including the tensioner arm and both versions of the add on retainer which I'm not using.

cmetzel wrote:

Looks good!  How much was it at Shapeways if you don't mind my asking?


That's why I keep telling people to raise what they're charging for prints.  I started off at half of shapeways price or half of our current suppliers prices when my quality wasn't nearly as close as theirs.  But as I've learned and improved my quality I'm bumping up a bit.  If they don't like my price or shapeways is lower than I want to charge I give that option to the potential customer. 

Early on I asked the question and people said you can legitimately charge for your engineering time but shouldn't charge that much for your printing time because you're not doing anything.   Here's shapeways doing literally no engineering other than orienting and closing open polygons (not even sure they do the closing of poly's I've never uploaded a bad model to them to see)   But the point is they're charging WAY more than any of us would charge for this set of parts, that they are certainly putting on one platform and printing in under an hour. 

Tim, don't get discouraged by what you've been doing.  It's being noticed by I hope many others as well as me.  As soon as I get your PM with your address I'm sending a couple spools and I'll take care of shipping charges because you're helping out so many others.

11 Reply by Schieggster

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Re: Question about mk4 extruder replacement and loseness

cmetzel wrote:

That's why I keep telling people to raise what they're charging for prints.  I started off at half of shapeways price or half of our current suppliers prices when my quality wasn't nearly as close as theirs.  But as I've learned and improved my quality I'm bumping up a bit.  If they don't like my price or shapeways is lower than I want to charge I give that option to the potential customer. 

Early on I asked the question and people said you can legitimately charge for your engineering time but shouldn't charge that much for your printing time because you're not doing anything.   Here's shapeways doing literally no engineering other than orienting and closing open polygons (not even sure they do the closing of poly's I've never uploaded a bad model to them to see)   But the point is they're charging WAY more than any of us would charge for this set of parts, that they are certainly putting on one platform and printing in under an hour. 

Tim, don't get discouraged by what you've been doing.  It's being noticed by I hope many others as well as me.  As soon as I get your PM with your address I'm sending a couple spools and I'll take care of shipping charges because you're helping out so many others.

That makes total sense, I think for within the community, if I don't screw it up, I'd do it at cost (Whole whopping $3.00 probably). I do sell some prints and charge per m of filament rather that cm^3, but I'm doing test models for things I hope to sell eventually. I'd like to generate enough for a couple spools of filament here and there.

12 Reply by cckens

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Re: Question about mk4 extruder replacement and loseness

Schieggster wrote:

That makes total sense, I think for within the community, if I don't screw it up, I'd do it at cost (Whole whopping $3.00 probably). I do sell some prints and charge per m of filament rather that cm^3, but I'm doing test models for things I hope to sell eventually. I'd like to generate enough for a couple spools of filament here and there.

Man after my own heart... Just enough for a fix... then another... and another... smile

13 Reply by elmoret

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Re: Question about mk4 extruder replacement and loseness

cmetzel wrote:

Tim, don't get discouraged by what you've been doing.  It's being noticed by I hope many others as well as me.  As soon as I get your PM with your address I'm sending a couple spools and I'll take care of shipping charges because you're helping out so many others.

I don't mind it a bit, Just surprised they manage to sell for that much.

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14 Reply by myrand

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Re: Question about mk4 extruder replacement and loseness

damn, for 50$ i'll start the milling for you and you'll get one made of 6061 aircraft grade aluminium.