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This section is for questions and advanced guides for BoXZY's 3D print head.

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flex (ninjaflex) filament>filament looping around wheel

Hi everybody,

I’ve just noticed that the unofficial boxzy forum had been closed. Does someone knows what happens and if it has been moved somewhere?

My now problem is the following: I’d like to 3D print Ninjaflex filament.

As BoXZY’s specifications said it’s possible, I tried. Problem is that the bowden tube is not really in the middle of the 2 wheels that pull the filament in it. So the filament has a very strong tendancy to do loops before entering in the bowden tube instead of going into it. And as the hole to the bowden tube is not so close to the wheel, there is space enough so that it loops…

Does anyone would have any solution?

Thank you in advance!!!

Regards,

Sylvain

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8 Answers

Hi,

What generation of BoXZY are you using?

Ninja flex is the hardest of the flexible filaments to print, and flexible filaments in general are extremely difficult. Many people will create 3d printed filament drives just to assist in printing it.

Flexible filament print speed is limited by how fast you can extrude it without it bunching up in the filament drive. This is usually between 5 and 10mm/sec on a bowden system. Really there is no magic. You need extremely slow print speeds and no retraction. Usually you will want to increase the temperature a little above the filaments recommended print temperature too. Beyond those items, the next step is a Flexion filament drive, or similar, which is specifically optimized for flexible filaments.

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Hi,

Thank you for your answer. I’ve the 1rst generation of BoXZY (kickstarter campaign) with a new nozzle, ferrites, fans, and that’s all.

I’ve tried just to get filament outside of the nozzle (with manual control), but always loops in the filament drive. I needed retractation to cancel the loop so in fact it’s impossible to print anything.

May you tell me more about “Flexion” filament drive and how you think it’s compatible with BoXZY ; and if BoXZY has any filament drive improvement that could help me?

Also, if you know better flexible filament to print with BoXZY "as is”, I’m very interested!

Thank you very much in advance.

Sylvain

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Hi,

The manual extrude buttons extrude far too fast for flexible filament. In settings, in the printer tab, you can adjust the manual extrude speeds. Keep in mind those speeds are distance of filament, not speed of travel which is where the 10mm/sec number comes from. You need much smaller numbers. I would start in decimals.

There are many ways to upgrade your extruder. Here's one example:

https://www.thingiverse.com/thing:280935...

Many extruders are designed to bolt directly on the motor bolt pattern, like the BoXZY mount.

Once you have upgraded, just remember you have to tune it for extrusion ratio:

https://www.google.com/amp/s/m.all3dp.co...

An easier filament would be the Cheetah series, which is more rigid and simpler to print:

https://www.matterhackers.com/store/c/ni...

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Thank you again.

Is there any possibility/hope that BoXZY team manages to redesign the filament drive (or even more include it in the 3D print head canister) in order to make it "easy" to print flexible filament?

Sylvain

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Hi,

I beleive that is unlikely. If the machine did receive a major change like that, I would expect that it would not be backwards compatible with earlier models.

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Hi,

I think that it would be a pity, and would send a really bad message to futur byers (on top of owners) : we don't care about first time buyers, of their confidence in us, and we develop new products impatible with previous ones...

Unless real technical reason, I don't think it would be a good commercial strategy at all.

Up to now, BoXZY team have improved the 3D print head, fans, ferrites, etc. which are fully compatible with first version.

In my humble opinion, dual extruder or this kind of improvement, if developed, must be compatible with 1rst version of BoXZY.

Be sure that I would not not re-invest in a BoXZY machine if BoXZY team did not do all they can so that it's compatible. There are other machines on the market that have shown their ability to do improvements fully compatible with their first range.

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My assumption was for technical reason, not commercial ones.

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Hello,

I’ve the 1rst BoXZY. Since the kickstarter campaign, have the filament driver been improved and if so, is it better for flexible filament? Should I buy it as spare part and change it?

Regards,

Sylvain

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It has been improved, manufacturing wise, but it is still the same design, so I dont know if there's any real advantage to buying a new one. You may want to consider a Bond-tech upgrade https://www.bondtech.se/en/product/bmg-e...

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Hello,

I found this https://fr.aliexpress.com/item/Trianglel... on Alibaba, it’s a clone of Bond-Tech, with better parts for the third of the price. But it only exists in 1 orientation. May you tell me if it’s compatible with BoXZY please? I’m very unsure of how I could implement it if the orientation is not good.

Thank you again for your help.

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I actually have one of those. In my opinion its better than the original, but it's never a guarantee two items will be identical with chinese manufacturers. It's orientation is correct for BoXZY, and I've found you can even reverse the direction of the filament flow with them, to use them in a different orientation, if need be. All you should need to do to use is to install it, and then adjust the filament drives steps per mm. This system is geared so the steps per mm will be At least 3 times as high.

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Thank you Justin. Where do I adjust the steps/mm? Is it somewhere in a driver file or in the slicer settings?

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In the EEPROM from the interface

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Would you mind posting a printscreen please?

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You will need to be connected to access and edit the EEPROM setting. You are looking for “Extr. 1 steps per mm" . Make sure to google “filament drive calibration” for instruction on determining the correct number.

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Thank you very much Justin. Always a pleasure to read you. Take care.

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Hello “Just helping”,

As you have the same filament driver as me, would you mind posting a picture of it on your BoXZY please?

I’ve received it and would like to mount it, but I’m not so sure about the orientation, the side, … in a word on how to mount in on my BoXZY! A picture would help me a lot!

Thank you very much in advance !

Sly

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I will work on getting a picture for you

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Sorry, It's gonna be a little while yet. I'm in the middle of a move and all of my equipment is temporarily in storage.

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No problem, thanks for your message.

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Hi Justin,

Any progress in your move?

Best regards

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Hi,

Yes, but my devices are still packed. It'll take me a bit longer to get everything out

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Sylvain CACHEUX will be eternally grateful.
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