Have you guys seen the new Bondtech BMG extruder?
http://www.bondtech.se/en/products/extr ... -extruder/
Looks like a pretty nice option for a lightweight geared 1.75mm extruder.
Bondtech BMG
- Neotko
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Re: Bondtech BMG
I think actually is heavy. I mean, 220grms for an UM could be quite stressful. It could be like printing with a um3 head.
Ofc for slow printing (like um3) it should be fine as long you copy the acceleration/jerk tricks (not hard to do if you can avoid stuttering on the marlin).
Also ofc, printing at just 500/5 (accel/jerk) is doable for directdrive, but on all my tests it shows how poor is Marlin to readjust the extrusion flow and it doesn't deliver precision (specially on edges).
So, useful? Yeah. I would put a pancake + fan motor on that, I suppose they used 5mm shaft and their small bondtechs to keep size/weight down, so it should be compatible.
The biggest problem I see adding weight to the um hotends is that everything is too weak and it forces to slow down everything.
Until Gudo last beta we seen a lot of problems even with barely 60grms, but current beta can stay at maximum accel/jerk with less ringing than bowden...
Overall, I would make the head stronger and more stable to put 220grms. Or, make a on/off system so it can be installed on the head for flexibles and outside (bowden) for normal printing. That way IMO could work.
Ofc for slow printing (like um3) it should be fine as long you copy the acceleration/jerk tricks (not hard to do if you can avoid stuttering on the marlin).
Also ofc, printing at just 500/5 (accel/jerk) is doable for directdrive, but on all my tests it shows how poor is Marlin to readjust the extrusion flow and it doesn't deliver precision (specially on edges).
So, useful? Yeah. I would put a pancake + fan motor on that, I suppose they used 5mm shaft and their small bondtechs to keep size/weight down, so it should be compatible.
The biggest problem I see adding weight to the um hotends is that everything is too weak and it forces to slow down everything.
Until Gudo last beta we seen a lot of problems even with barely 60grms, but current beta can stay at maximum accel/jerk with less ringing than bowden...
Overall, I would make the head stronger and more stable to put 220grms. Or, make a on/off system so it can be installed on the head for flexibles and outside (bowden) for normal printing. That way IMO could work.
- Meduza
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Re: Bondtech BMG
Yeah, I would not even think about mounting it as a direct feeder on a UM gantry, I was more thinking about the FT-5 guys.
- Neotko
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Re: Bondtech BMG
Ohh sorry!!
- Meduza
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Re: Bondtech BMG
No problem, i was not very specific in my first post
The ZGE looks like it might be a lot better solution for direct drive on the UM gantry, and i am very interested to see how that project moves forward!
The ZGE looks like it might be a lot better solution for direct drive on the UM gantry, and i am very interested to see how that project moves forward!
- Neotko
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Re: Bondtech BMG
I suppose it could be adapted to any system where the head doesn't go up/down (so it removes the weight).
Atm the system works very very nicely. Gudo made quite an impressive system. I have change my 3 machines and currently all my shop production is made using zge and tuby nozzles. Quality is just awesome, specially since I need to print all at 60-70mm/s and at that speeds quality shows the weak spots of the printers very very fast.
Atm the system works very very nicely. Gudo made quite an impressive system. I have change my 3 machines and currently all my shop production is made using zge and tuby nozzles. Quality is just awesome, specially since I need to print all at 60-70mm/s and at that speeds quality shows the weak spots of the printers very very fast.
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Re: Bondtech BMG
I agree with Neotko, the BMG is still too heavy in my opinion.
All these new feeders suffer from being based on a motor that is as common and cheap as possible, which is understandable but not optimal considering those motors are rather heavy.
Just as Neotko, I concluded that the extra weight on the head (in my case 100 grams for the direct feeder) means you need to reduce speed/acceleration quite a lot to prevent impact on the printing quality.
Generally, I would aim at 50 grams total weight if I invented something, that way it is possible to mount two of them without suffering too badly from the extra weight.
The ZGE is really interesting, unfortunately I have been occupied with other things lately otherwise it would be interesting to test it.
All these new feeders suffer from being based on a motor that is as common and cheap as possible, which is understandable but not optimal considering those motors are rather heavy.
Just as Neotko, I concluded that the extra weight on the head (in my case 100 grams for the direct feeder) means you need to reduce speed/acceleration quite a lot to prevent impact on the printing quality.
Generally, I would aim at 50 grams total weight if I invented something, that way it is possible to mount two of them without suffering too badly from the extra weight.
The ZGE is really interesting, unfortunately I have been occupied with other things lately otherwise it would be interesting to test it.
- LePaul
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Re: Bondtech BMG
That's a beast
On the topic of FT-5 and extruders....
A couple FT-5 guys have been looking at going with a Bowden setup, taking advantage of the Z axis gains from the shorter E3D Aero. With the FT-5 capable of some impressive speeds already, the Bowden setup would be nice too.
I bought a pancake motor for my FT-5 and the E3D v6/Titan Extruder
I'm debating which version of the Aero to go with (I initially bought )...stick to the Titan upgrade to Aero..or re-think and go Bowden,
On the topic of FT-5 and extruders....
A couple FT-5 guys have been looking at going with a Bowden setup, taking advantage of the Z axis gains from the shorter E3D Aero. With the FT-5 capable of some impressive speeds already, the Bowden setup would be nice too.
I bought a pancake motor for my FT-5 and the E3D v6/Titan Extruder
I'm debating which version of the Aero to go with (I initially bought )...stick to the Titan upgrade to Aero..or re-think and go Bowden,