Here are some more developing that I am working with, my time is quite limited since I have a full time work as a manager for a R&D department for a big furniture company here in Sweden. My 3Dprint related development has been done during evenings, nights and weekends for the last year.
During this year I have found a good friend in @Eclsnowman supporting me and also for discuss ideas, Eric is a real expert and an awsome engineer with his impressive printers Herculien and Eustathios, please check him out if you have not done it already.
The reason for developing the Bowden extruder is the fact that I am also developing a new 3D printer and during the prototype testing phase I have had really a lot of problems with the existing designs of extruders with clogs, grinding, slipping etc making me really frustrated, but it seems like a good thing since this was the start for the Bondtech Extruder!
In the following images I show you some more units, direct-drive for 1.75 with an integrated mount for an E3D-nozzle, a unit for 3.0 filament with a planetary gearbox with integrated mount for an E3D-nozzle. The last one I have plan to replace the existing extruder of my heavily rebuilt K8200 printer. The performance of this printer lead me to start to develop my own since the design of the K8200 has a lot of design flaws.
I would like to show you my workshop but at the moment it is not clean enough to show you without being embarrassed.
I had a Bowden failure last night (my fault, too much retract with PLA)…your mechanism is SO strong you may want to ensure a safe failure if the nozzle clogs or the filament is undertemp.
Hi @Mike_Miller I have been thinking of this and I think the best way would be to limit the current for the extruder motor to a safe setting so the motor will stop before the bowden will pop-out, I have not done enough testing of this yet and would be very happy if you had the possibility to try some settings that would work and we could then share this information to all testers out there.
Nice, so far I’ve found the ability to remove the extruder separate from the nozzle to be a “feature” in the sense that unclogging the hot end is easier, although with your extruder I’m seriously looking at adding a “cold pull” mode for nozzle cleaning, it has enough grip to do the cold pull!
I’ve found it’s easiest to change filament (and a clog) by heating the nozzle, pulling the filament from the hot-end, clipping off the glob, pulling the front and gear off the extruder, and feeding the filament back out the bottom.
It’s MUCH faster than messing with my Wades…there’s no grinding or powder or anything, and the screws don’t need heavy torque or spring-loading or adjustment…just off-on-snug, print-on!
@Ashley_Webster that would be great, we can do a hangout to discuss it more if you want.
Need 2 testers? I’ve been trying to move to direct for a while but have yet to find a design I really like.
Why not @Joe_Spanier , drop me an e-mail at order@bondtech.se which one you are interested in and i will come back with details.
@Martin_Bondeus not sure how you keep making better products and iterate so quickly. But I am glad you do, my prints have never looked better.
I think integrating this into a HercuLien carriage is in my near future. I have been wanting to try flexible filaments.
Email Sent @Martin_Bondeus Looking forward to hearing from you.
