Originally shared by Tim Rastall
Fixed the noise issues on Procerus and pushed the acceleration up to 22000 mm/s/s. Speed is set to 833mm/s.
Holy smokes ! that is very impressive !
Perhaps this is premature, but are there positioning precision issues at these kind of speeds ? Also gotta wonder if any hot end / extruder can handle anything even close to that.
Any print at 833mm/s?
Would love to build one like this, but with printing area about 200x200 and about 150 mm/s printing speed, how about its stability? Printing quality? Thank you 
I see you are using a bubble wrap to dampen the noise and vibrations. I used to do that too, but my prints look like a shit because of too much wobble. Then I switched to a different solution. I took a small wooden square put a rubber band on it and put another wooden square on it, made 4 of them and put them under the printer. now the printer is quiet and prints nicely. It’s even quieter than before.
I would also really like to know how you’re using dual steppers on each axis - wired to the same driver? in series or parallel? Any other electronics involved? I tried it but I kept getting magnetic coupling between the two motors.
Alden Hart, of TinyG, has extruded plastic at very fast speeds… He tells me that beyond 700mms, it is impossible to get a good finish on the part due to “shark-skinning” and other problems. Alden is one of the smartest guys I know and I believe him.
So from here on out, I think any printer expecting high quality prints above 700mms is not realistic.
That said, if you are doing large scale, fast printers intended to do a rough print – go for it!
Running the hardware without extruding is a neat demo and a great test to work out any mechanical issues. But I have never seen a really fast print with amazing surface quality.
If we want to improve surface quality and resolution at ultra high speeds, I guess we first need printers that will go that fast!
Looking pretty awesome there.
@Mark_Moissette_ckaos this was really just a top speed test. I don’t imagine it’ll run any quicker than 500mm/s. The E3d volcano should handle those kinds of speeds.
@Michal_Canecky I usually use squash balls filled with expanding foam and cut in half. Just haven’t got around to making any yet.
@Jeff_Para the steppers are terminated in parallel on the Krone block you see on the top of the bot. Driven by one of the on board drv8825s on the Azteeg x5 mini
@Brook_Drumm all correct; I’ve no expectation that this will achieve 800mm/s speeds when printing. Particularly at 20000mm/s/s acceleration. Really just testing to see how the dual steppers per axis effects top speeds etc.
Tim, Can I get a picture of that Krone block? When I hook my steppers in parallel they feedback against each other from the magnetic fields.
@Jeff_Para sure, I’ll take a snap later.
The volcano looks cool! But it doesn’t solve all problems, just trades resolution and ooze for speed. That doesn’t do it for me. Increasing speed without trade off and lowering cost is my goal.
But testing and banging on the outer limits is how we will get there.
Good job! Keep it up!
Brook
@Brook_Drumm Yeah, not expecting the volcano to do anything other than squirt out thicker layers more quickly. The Procerus has a theoretical Z of something like 900mm so thick layer heights will be necessary if I don’t want prints to take a week :). I suppose it could always be used in conjunction with a second smaller nozzle that does 3 or 4 perimeters at low layer height and then the volcano does a single pass for infill and internal perimeters…
I like that approach!
fantastic
Btw, I’ve used doubled up motors s LOT without issue. Just have to give them a little more juice. We run 2 amp drivers
@Brook_Drumm good to hear. I’m running 2.4amp drv8825s but their tuned to 2amps in the smoothie config file.