Search found 89 matches

by Vice Chief
Sun Nov 05, 2017 1:14 am
Forum: Others
Topic: RINGING the electromechanical challenge
Replies: 37
Views: 12210

Re: RINGING the electromechanical challenge

Regarding the "rippled" extrusion of apparently varying width when viewed from overhead, might this not be a consequence of the toothed wheel and stepping motor feed system? Or does that stuff get "averaged out" by the fluid melt inside the nozzle? If this were the case, wouldn'...
by Vice Chief
Sat Nov 04, 2017 9:05 pm
Forum: Others
Topic: RINGING the electromechanical challenge
Replies: 37
Views: 12210

Re: RINGING the electromechanical challenge

Here's some 1000FPS footage of ringing as it happens.
https://www.youtube.com/watch?v=Gqbj1IrtdpM

Here's a plot of ringing extracted by tracking features of the video.
RingingPlotCrop.jpg
by Vice Chief
Sat Nov 04, 2017 5:39 pm
Forum: Others
Topic: RINGING the electromechanical challenge
Replies: 37
Views: 12210

Re: RINGING the electromechanical challenge

I'm starting to think I have a pretty good idea of what's happening here. Here are some images that tell a story. In the images of this print, the motion goes from left-to-right. These were all shot with my photomicrography rig. 1. I printed my test cube, but stopped the print halfway. That way, I c...
by Vice Chief
Sat Nov 04, 2017 4:01 am
Forum: Others
Topic: RINGING the electromechanical challenge
Replies: 37
Views: 12210

Re: RINGING the electromechanical challenge

Yes, that article sounded great but when you read it there is nothing specific, "just we can do this trust us". What I found fascinating was that it was done based on first principles (theory) rather than on measurement. I am a big fan of measuring things! Press releases usually suck. I f...
by Vice Chief
Sat Nov 04, 2017 12:39 am
Forum: Others
Topic: RINGING the electromechanical challenge
Replies: 37
Views: 12210

Re: RINGING the electromechanical challenge

OK, well this turned out to be fairly interesting. Conditions: 1 year old N2. ABS plastic. .15mm layer height. I printed my test object twice. The first print was with a single stepper on the extruder carriage assembly. The second was with both steppers in place. Ringing4.jpg To make these images, I...
by Vice Chief
Fri Nov 03, 2017 9:51 pm
Forum: User's Gallery
Topic: Patterns for Aluminium Sand Casting
Replies: 56
Views: 23366

Re: Patterns for Aluminium Sand Casting

Caxton3D, I agree wholeheartedly. I think the Raise3D printers offer great value. In one of my jobs, I bought a Fortus 450, and also several Raise printers. The Raise machines were close enough in quality for 95% of our prints, and around 1/30th the price. Plus, since they weren't "precious&quo...
by Vice Chief
Fri Nov 03, 2017 9:39 pm
Forum: Others
Topic: RINGING the electromechanical challenge
Replies: 37
Views: 12210

Re: RINGING the electromechanical challenge

so I think that the biggest ringing problems we are actually capable of seeing are in the 0.5-2mm range, what frequency range would that be? It looks like 30-120 Hz BUT you don't get many ringing problems when going flat out at a constant speed, they are mainly on decelerations! Maybe I'm a little ...
by Vice Chief
Fri Nov 03, 2017 8:38 pm
Forum: Others
Topic: RINGING the electromechanical challenge
Replies: 37
Views: 12210

Re: RINGING the electromechanical challenge

Although it's not really instrumentation grade, I may pick up one of these: https://www.phidgets.com/?tier=3&catid= ... &prodid=31 to get started.
by Vice Chief
Fri Nov 03, 2017 4:20 pm
Forum: Others
Topic: RINGING the electromechanical challenge
Replies: 37
Views: 12210

Re: RINGING the electromechanical challenge

Another thought I had, I have removed the second extruder from both of my machines, but it's not difficult to bolt the second stepper back on. I could print one print with both steppers in place, and one with just one stepper in place. Since the whole system gets lighter, one would expect that the f...
by Vice Chief
Fri Nov 03, 2017 4:18 pm
Forum: Others
Topic: RINGING the electromechanical challenge
Replies: 37
Views: 12210

Re: RINGING the electromechanical challenge

To me, it makes sense to start by measuring it. We are seeing ringing - are we all seeing the same ringing? What is the fundamental frequency of the ringing? If money was no object, the right way to measure it would be to put accelerometers all across the motion hardware (definitely agreeing with wa...
by Vice Chief
Tue Oct 31, 2017 8:01 pm
Forum: Hardware
Topic: Having print issues? Check your nozzle.
Replies: 1
Views: 1354

Having print issues? Check your nozzle.

I had some weird, hard-to-solve print issues with my N2. Felt like incorrect extrusion multiplier, but that didn't solve it. And the problem was always on the left side of my print. My rafts were also coming out weird. I remembered that the nozzle struck the bulldog clip at the beginning of a print....
by Vice Chief
Fri Oct 27, 2017 4:37 pm
Forum: Others
Topic: Cyanoacrylate (Super Glue) to greatly improve adhesion
Replies: 11
Views: 5437

Re: Cyanoacrylate (Super Glue) to greatly improve adhesion

Thanks for the very specific info, Zemlin. Am I understanding right that you bond the PEI sheet onto the MIC6 AL sheet and then place the stackup on the heated build platform? And you're using MIC6 for its flatness? I've been using 6mm borosilicate glass to get things good and flat, but the thermal ...
by Vice Chief
Wed Oct 25, 2017 9:42 pm
Forum: Hardware
Topic: rear guide rail looks worn already
Replies: 11
Views: 3306

Re: rear guide rail looks worn already

I have galling on the X and Y rods of my N2, and on the X rods of my N2+. I find that being religious about lubricating the rods keeps it from getting worse. I use Super Lube with PTFE, and apply with an acid brush/chip brush. Galling_20171025_143448.jpg Galling_20171025_143455.jpg So far it has not...
by Vice Chief
Wed Oct 25, 2017 9:30 pm
Forum: General
Topic: Ready to give up?
Replies: 10
Views: 3605

Re: Ready to give up?

It's a little out of focus, but looking closely at your picture, it looks like the spring clamps on the back of your bed surface are bent upward and not holding the glass.

Is your bed/glass and buildtak being held securely?
by Vice Chief
Mon Oct 23, 2017 6:53 pm
Forum: Software
Topic: ideaMaker 3.0-RC Release Note Updated Rev. 3.0.5 2017.12.18
Replies: 263
Views: 84349

Re: ideaMaker 3.0.0-beta Release Note 2017.10.23

Wow. Can't wait to try it out!
by Vice Chief
Mon Oct 23, 2017 6:51 pm
Forum: Printing Settings
Topic: Polymaker PolyFlex - printable? How?
Replies: 35
Views: 10771

Re: Polymaker PolyFlex - printable? How?

Here's a little more detail on that topic. https://3dprintingindustry.com/news/cut ... an-123158/
by Vice Chief
Sat Oct 21, 2017 6:10 pm
Forum: Printing Settings
Topic: Polymaker PolyFlex - printable? How?
Replies: 35
Views: 10771

Re: Polymaker PolyFlex - printable? How?

Another possibility would be to identify whether the ringing is primarily happening at some fundamental frequency, and make a passive damper centered on that frequency. I used to know someone who engineered viscoelastic dampers for space applications, it was one of the last-ditch ways to reduce vibr...
by Vice Chief
Sat Oct 21, 2017 5:40 pm
Forum: Others
Topic: DRYING FILAMENT
Replies: 6
Views: 3857

Re: DRYING FILAMENT

Great looking parts. Aside from the layer height, they look comparable in quality to much higher end nylon machines I've seen at tradeshows. What layer height are you using with your .6mm nozzle?
by Vice Chief
Sat Oct 21, 2017 1:12 am
Forum: Others
Topic: DRYING FILAMENT
Replies: 6
Views: 3857

Re: DRYING FILAMENT

Great tip. I've been looking at ovens, too. I have access to a "standard" food dehydrator (a round one) but I hadn't seen them in this oven-like format.

It's a little tough to tell from the pictures, how many rolls can you dry at once with the larger unit?
by Vice Chief
Fri Oct 20, 2017 9:34 pm
Forum: Software
Topic: Remarkable new feature in Slic3r - Adaptive Layer Height
Replies: 7
Views: 3555

Re: Remarkable new feature in Slic3r - Adaptive Layer Height

"...instructions on how to get Slic3r working with the Raise printers?" (also Cura, S3D, Kisslicer) I'm deliberately not being specific because you need to delve into the settings and understand them to be able to use another slicer effectively. So take some time and experiment. By sharin...

Go to advanced search