Maker Faire was a huge success! The reveal of our new Printrbot Simple v2 was well received.
SO COOL! is that a touchscreen?
Well deserved too. From what I saw, it was one of the most if not the most innovative printers there.
Been following the reveal closely, spent a lot of time trying to glean as much info from those teaser pictures as I could.
New PrintrBot looks awesome, very interested to hear more about the new firmware/electronics. I’m not sure I’m sold on the whole controls-on-printer idea, but would like to give it a shot at least.
Putting together the money to actually get one though…that’s another story.
@Tom_Nardi I would assume you could still probably hook it up to a computer if you want. He has a full size usb on it now.
Yes, you can still use it over USB of course. But seems a bit silly to pay the premium for a machine with onboard controls and never use them.
The idea is to remove the requirements of having a computer connected all of the time. This also allows for cloud based printing.
But the big advantage of the new electronics is what you don’t see, new controller with 3rd order acceleration and 32bit.
6th order acceleration 
but who’s counting? … Oh, ok, we are
(Just corrected myself- not 7th… But 6th!)
Can you explain what the order of acceleration mean? Just curious
Corrected: it’s 6th order acceleration. See complicated explanation here:
6th order acceleration isn’t quite the right jargon either. It is 6th order motion planning.
Position is zero order
Velocity is first order (first deriv of position)
Acceleration is second order
Jerk is third order
Snap is fourth order
Crackle is fifth order
Pop is sixth order
Most motion control platforms are second order-ish (constant acceleration), with a hacky way of implementing jerk control.
The benefits of higher order control are non-constant accelerations, and non-infinite jerk. It remains to be see if this offers any benefit in FDM 3D printing.
Rob from Tinyg tells me there is an unnamed 7th order ??? And mentioned that snap crackle and pop received their name from a guy involved in the lunar landing… He said this is the first known reference to the names
You can take as many time derivatives of something as you want, but derivatives past jerk have decreasing utility in motion control.
Ha! Point taken. The proof is in the pudding… Or print
The tricky part is tying it into the extrusion rate. Extrusion is non-linear with speed and lags behind because of melt chamber pressure, capacity, temperature, and rate. Advance calculations become more complex and necessary (jerk is a hack, as lowering the jerk rate leads to more material being deposited in corners as the melt chamber empties it’s loaded pressure).
It would need to be calibrated per material, per nozzle diameter, and per hotend.
Nice… keep up the good work!
I bet the steppers like the 6th order acceleration better and are probably quiter with less mechanical feedback (shaking). I couldn’t tell at Makerfaire if this was true due to the ambient noise.
MUCH quieter and almost no shaking (depends on speed though) and the noise is is like beautiful music… Sounds foreign after getting used to the mighty printrboard. I’ll have to retrain my brain.
@Stephanie_A actually, we have disabled retraction altogether. The extrusion is NOT a hack anymore, it also is managed with acceleration (jerk), and is perfectly tied to the X & y so the pressure doesn’t build up at all. It’s weird. Marlin’s acceleration IS a hack but a very clever one that works really well, I must say. Pretty wild not to live in marlin’s world, although, we will continue making the printrboard for some time. We are even preparing a rev F6 with some improvements. Just cause a couple things bug me.
Wow, A big step of 3D printing (http://www.cleanwetwipes.com)