I got some small nozzles to experiment lately 0.25 to be exact. the detail you can get with smaller nozzles is amazing. This was made with a BCN3D Sigma fitted with Bondtech extruders. anyone here doing small FDM prints?
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I’ve been printing small models too.
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Oh Cool what nozzle size are you using @Weeke_Boy ?
The nozzle is .4 millimeters in diameter, but i never print over .2 millimeters.
@Nikos_Konstantinidis Do you have a link for the conversion you implemented? There’s a conversion bundle on Thingiverse for using E3D v6 nozzles, but standard extruder drives. You did change the nozzles on your printer, yes? Which nozzle/hot ends did you select?
@Fred_U This is my set up. Bondtech extruders and the e3D V6 hotend conversion parts by iDevelo. But I got them in SLS Nylon. are you interested?
@Nikos_Konstantinidis That’s a beautiful set up. The darker housings look much better than my factory white configuration.
I plan to move ahead in segments, first the hot ends, then maybe the extruders and external spool mounts.
I found iDevelo’s thingy here:
and have downloaded it. The thingy information says the presentation is incomplete. What additional tasks must be performed beyond printing the housings, if only the hot ends are being replaced?
What benefits have you found to having the quality of Bondtech extruders as part of your conversion?
Do you know of the flex3drive system, in which the extruder mechanism is on the hot end and the motor is on the frame, powering a flexible drive cable to the extruder gear? It provides precise retraction and easier management of flexible filaments, according to the manufacturer.
I’ve been pleasantly surprised at how well the Sigma handled the spaghetti limp PVA filament I’ve used in the past, but keep wondering about more capability.
Having the ability to change a nozzle without having to swap out an entire expensive assembly is a big draw for me.
I bought a nozzle kit from E3D recently and the 0.25 nozzle is my current favourite for printing things like gears with. I really enjoy the accuracy improvement it gives me. I still print some things with a FAT nozzle however.
@Fred_U All the parts you need are there apart from the top cover which needs a bit of filing to fit after the modification of I can send you mine to print.
The Bondtech grabs the filament from two sides with hardened steel gears and so it can push very hard with out grinding it and the same applies for fast retractions, it does not deform the filament. it has a 5:1 gearing so the resolution is also increased by 5 meaning that tiny prints are possible. It is the only way to print the small perforated lizard(at 33% scale put on your slicer and see how small it gets at 33%). IT can print any filament. Flexibles come out very nicely because they are not being squashed while being pushed in the tube and can print at around 60mm/s in Ninjaflex with no slipping and very impressive retraction speed so not stingy at all. I have also been printing wax filament (for lost wax casting by Machinable Wax)which is super soft and it grinds very easily but with the bondtechs it is no problem.
So my Sigma is now much much more reliable now.
I was very skeptical of the Bowden setup about a year ago when I bought an Ultimaker clone and so I got a Flex3drive too! Some people like it very much but I had a hard time with it. Then got a Bondtech and gave upon any other extruder. Bowden with a powerful extruder in my opinion are equal to direct although theoretically they have more flexibility in their system.
The e3D hot end are great! easy to swap nozzle but still have to re calibrate the Z height. Also the socks they have are super especially for dual prints as the nozzles remain very clean so in some cases no wipe tower is required. I got the conversion parts in SLS if you want them.
@Duncan_Gunn Yea the same here! I also like the 0.8mm nozzle a lot for large vase mode prints!!! I might get a Volcano too with 1.2mm nozzle.
This is the newest extruder system I saw https://www.youtube.com/watch?v=nwlZ7yV5qR8 looks cool!
@Nikos_Konstantinidis I’d seen that sliding extruder drive recently and thought it was pretty slick. I thought at first it would be impossible to make it work with a Sigma, but then realized only one extruder moves at a time, so there should be no clashing. Allowing that the length of the drive rod has to reach the farthest corner, relative to the motor mount, one must realize that the rod will strike the inactive extruder when printing to the back corner adjacent to the inactive extruder.
Perhaps the design could be modified in order for the sliding rod to be fixed at the nozzle and slide through the drive mechanism.
I’d love to have the parts in SLS, but the cost would be prohibitive. I’ve not committed to the conversion of only the nozzles and adding a pair of high-quality, high-cost Bondtech extruders is very much a delayed project.