3D Printer Uses Magnets to Break Speed Limits, Print at a Table-Shaking 800 Mm/S
tomshardware.com
tomshardware.com
I am not an expert on 3D printers, but the concept sounds very interesting.
Belt-driven printers have been able to operate at 800 mm/s and 200.000 mm/s² for a now, and can finish a Benchy in under 3 minutes.[0] However, that requires some pretty serious part cooling - which seems absent from this printer.
It definitely looks like a very interesting concept, but extraordinary claims require extraordinary evidence. The whole reason CoreXY is so fast is because it minimizes the total mass being moved around, but these magnetic linear motors look a lot heavier.
The only extraordinary claim here is that they’ve managed to fit two axes in a $2,000 consumer device. From the video, it looks like they inverted the design so that the stator is a bunch of alternating magnets and they have a small coil on the rotor. I figure FPGAs and other electronics have finally gotten cheap enough to make them this small and cheap so if they manage to ship they might be the first.
Personally I’ve been hoping the 3d printing community tackles linear motors and drives the cost down for years.
Here's a video: https://www.youtube.com/watch?v=OSafzXRfBM0
I just leave math to the people who are good at it and actually enjoy it :)
Are there ANY videos of it actually printing? Not just moving.
I understand it is closed loop and it is linear motors...but I have my doubts that they are not getting serious overshoot/correction.
They just had the machine at ERRF (now 3d printopia since everyone forgot about reprap) but there is not a single video of it actually printing. From Twitter I heard 3 or 4 different excuses...table vibrating too much (which is a poor excuse since my printer moves tables like that more with no print issues), broke extruder in transit...couldn't fix it, open enclosure too dangerous for public hands and finally that they have issues with the magnets being around too much heat/build chambers. Now these were all statements by twitter users and influencers...so I am not sure which statements if any were actually from Peopoly...but I personally am curious to actually see some print results more than I am to read 100 different influencers talk about how innovative this is without ever seeing it actually print.
Like others have said...linear motors are nothing special. Being able to do them on a machine for $2k retail while actually holding resolution at the claimed speeds would be.
From what I have seen it doesn't even appear they are hitting the claimed speeds in the video....but I have not measured that either.
P.S. The overshoot/lash I am talking about would be trivial to test with some very basic machining tools...so if I am wrong it would be easy to prove.
Does the machine make prints? If so why are there no videos or pictures?
I don't doubt linear motors are viable. My doubts are that they are doing it for under $2k. My understanding is they are already taking preorders at a discount from that price even.
Again, I would love for this to be a thing. Especially if they release their work opensource. I just have my doubts about results for the price...as well as my concern about the lack of a "working machine" while so many people are advertising for them.