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Upgrade to Bondtech mini extruders?  

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ir_fuel
(@ir_fuel)
Estimable Member
Upgrade to Bondtech mini extruders?

This is just an educated guess, and it will make the kit a lot more expensive, but would it be a possibility to replace the current feeding system on the top of the frame with one using Bondtech mini extruders?

http://shop.bondtech.se/ec/upgrade-kits/wanhao/bondtech-mini-for-wanhao-i3.html

The advantage to me (it seems) is that they actually pull the filament from both sides, and not simply from one side while the filament is being pushed from the other side using some hard to finetune idler system.

It would require changing the e-step value. Don't know if that's easy to do without recompiling the firmware?

Posted : 11/11/2017 10:55 pm
PJR
 PJR
(@pjr)
Antient Member Moderator
Re: Upgrade to Bondtech mini extruders?

That "upgrade" uses the same drive gears as the Prusa MMU: http://shop.bondtech.se/ec/drivegears/drivegear-kit-175-direct.html

Peter

Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage…

Posted : 11/11/2017 11:10 pm
ir_fuel
(@ir_fuel)
Estimable Member
Topic starter answered:
Re: Upgrade to Bondtech mini extruders?

Yes I know, but if I understand it correctly in our case only 1 is actually driven by the motor, and in the case of the Bondtech mini both are.

Posted : 12/11/2017 12:39 am
AJS
 AJS
(@ajs)
Noble Member
Re: Upgrade to Bondtech mini extruders?


Yes I know, but if I understand it correctly in our case only 1 is actually driven by the motor, and in the case of the Bondtech mini both are.

They are both driven by the motor, because they are geared together...

Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage or loss. If you solve your problem, please post the solution…

Posted : 12/11/2017 4:52 am
ir_fuel
(@ir_fuel)
Estimable Member
Topic starter answered:
Re: Upgrade to Bondtech mini extruders?

Yes, that's my point. You'll get pulling on both sides of the filament.

Posted : 12/11/2017 9:48 am
Cipis
(@cipis)
Member
Re: Upgrade to Bondtech mini extruders?

This is used on MMU upgrade 😉

Posted : 12/11/2017 11:00 am
PJR
 PJR
(@pjr)
Antient Member Moderator
Re: Upgrade to Bondtech mini extruders?

The Bondtech drive pulleys on the MMU (as previously linked) have gears which connect them and they are both driven by the motor (one directly, the other indirectly).

The fact that the filament drive on the MMU required the additional torque is the only reason why there was a change from a single drive pulley to the Bondtech dual drive.

Peter

Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage…

Posted : 12/11/2017 11:11 am
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