5 ms·

There is absolutely no way that video is in real time. What kind of servos are they using?

jstanley 9y ago
This kind of 3d printer generally uses stepper motors, not servos. From what I can see, this printer appears to use stepper motors too. I'd believe it's real-time. The X axis is held in place vertically by the 2 shiny metal rods you can see, and is dragged back and forth by the black rubber belt, which is controlled by a stepper motor.
- mwrouse 9y ago
  I know, I have several printers mtself. They are using only servos. Which is why it's faster probably. EMJ-04 series. The rate at which it jumps around is just ridiculous though.
- lylecheatham 9y ago
  They're actually using servo motors! They refer to it as a "servo-driven parallel gantry system" in the abstract.
melling 9y ago
The title says (in real time)
sallyfour 9y ago
Might be brushless motors and encoders
fiter 9y ago
My favorite ridiculously fast machines are wire bonders: https://m.youtube.com/watch?v=t4Jn7wVI3LU https://m.youtube.com/watch?v=t4Jn7wVI3LU
- pimlottc 9y ago
  Wire benders are pretty cool too: https://www.youtube.com/watch?v=j-gabeEJ7EE https://www.youtube.com/watch?v=j-gabeEJ7EE
jdietrich 9y ago
By commercial CNC standards, it's not especially fast. Have you ever seen a pick-and-place machine in action? https://youtu.be/ylk6VMBLrvM?t=3m54s https://youtu.be/ylk6VMBLrvM?t=3m54s
leon_sbt 9y ago
It looks like they are using either a CoreXY or H-bot based design. Nice thing about those designs, is that you don't need to accelerate the motors/wiring back and forth. Giving better acceleration rate per unit of motor. The downside with those systems, is that they tend not to be stiff (due to large amounts of belting), or react to external forces well. That (H-bot/Core-XY) design would be poor for a convention CNC router, that has to react the forces associated with conventional machining. But for this application, it doesn't matter. The forces acting on an extruder are basically non-existent, with the exception of (the mass of the extruder * its designed acceleration rate). For going that fast real time, it might have some trick servos, or a hybrid motor (Search for Technic ClearPath Motors). If you like that video, then you might like this one. https://www.youtube.com/watch?v=NgGiu_0x7tg https://www.youtube.com/watch?v=NgGiu_0x7tg (Note: Not afflilated with that company, just like the video)

This kind of 3d printer generally uses stepper motors, not servos. From what I can see, this printer appears to use stepper motors too. I'd believe it's real-time. The X axis is held in place vertically by the 2 shiny metal rods you can see, and is dragged back and forth by the black rubber belt, which is controlled by a stepper motor.

mwrouse 9y ago
I know, I have several printers mtself. They are using only servos. Which is why it's faster probably. EMJ-04 series. The rate at which it jumps around is just ridiculous though.
lylecheatham 9y ago
They're actually using servo motors! They refer to it as a "servo-driven parallel gantry system" in the abstract.

melling 9y ago

The title says (in real time)

sallyfour 9y ago

Might be brushless motors and encoders

fiter 9y ago

My favorite ridiculously fast machines are wire bonders: https://m.youtube.com/watch?v=t4Jn7wVI3LU https://m.youtube.com/watch?v=t4Jn7wVI3LU

pimlottc 9y ago
Wire benders are pretty cool too: https://www.youtube.com/watch?v=j-gabeEJ7EE https://www.youtube.com/watch?v=j-gabeEJ7EE

jdietrich 9y ago

By commercial CNC standards, it's not especially fast. Have you ever seen a pick-and-place machine in action? https://youtu.be/ylk6VMBLrvM?t=3m54s https://youtu.be/ylk6VMBLrvM?t=3m54s

leon_sbt 9y ago

It looks like they are using either a CoreXY or H-bot based design. Nice thing about those designs, is that you don't need to accelerate the motors/wiring back and forth. Giving better acceleration rate per unit of motor. The downside with those systems, is that they tend not to be stiff (due to large amounts of belting), or react to external forces well. That (H-bot/Core-XY) design would be poor for a convention CNC router, that has to react the forces associated with conventional machining. But for this application, it doesn't matter. The forces acting on an extruder are basically non-existent, with the exception of (the mass of the extruder * its designed acceleration rate). For going that fast real time, it might have some trick servos, or a hybrid motor (Search for Technic ClearPath Motors). If you like that video, then you might like this one. https://www.youtube.com/watch?v=NgGiu_0x7tg https://www.youtube.com/watch?v=NgGiu_0x7tg (Note: Not afflilated with that company, just like the video)