Slow flow, printing speed or temperature settings? (edited): Ruby nozzle?  

Re: Slow flow, printing speed or temperature settings?

I have finished an upgrade from MK2 to MK3 and on the first print with (using familiar filament and known settings) I have noticed filament strings are too thin. First layer is perfect starting with 2nd, 3rd and etc. there are gaps between strings.
Prusa.PNG

Does it eventually "jam up" completely? Does the extruder motor "click"?

First thing you should do is check to make sure your nozzle isn't clogged. (And do that by putting a new nozzle on it)

Are the temps staying good? It almost looks like under-temp extrusion. (Try printing hotter. If it fixes it you have a nozzle-temp issue)

EDIT: If you use Octopi, or can use Pronterface.
Send gcode...

M503


You will get a lot of information, you are looking for...

Recv: echo:Steps per unit:
Recv: echo: M92 X100.00 Y100.00 Z400.00 E280.00

Specifically the E280.00 part.

Re: Slow flow, printing speed or temperature settings?

Does it eventually "jam up" completely? Does the extruder motor "click"?

The printer is finishing the print but you are right about extruder motor - it clicks every minute or so.

First thing you should do is check to make sure your nozzle isn't clogged. (And do that by putting a new nozzle on it)

I will install brass nozzle as my last step. Because it will require heat break re-adjustment.
So sorry guys for not mentioning an important detail in the original post is that I installed Olsson Ruby nozzle

Are the temps staying good? It almost looks like under-temp extrusion. (Try printing hotter. If it fixes it you have a nozzle-temp issue)

During the print I bumped the temperature by 5C up and the print looked much better. Perhaps heat conductivity of rubby nozzle isn't the same as brass.

At the moment printing directly from SD card so can't play with the code.

Re: Slow flow, printing speed or temperature settings?

During the print I bumped the temperature by 5C up and the print looked much better. Perhaps heat conductivity of ruby nozzle isn't the same as brass.

At the moment printing directly from SD card so can't play with the code.

I would point a finger at the Ruby then. Just increase the temps.

Everyone acts like the temps written on the filament is a "set in stone, do not exceed".

I'm printing some 170-200 PLA. (yeah, that's not low at all)
First layer @ 230, Everything else @ 225.
And if I want a "darker" "glossy" finish, I crank it up another 10c. (although at that point, overhangs start to suffer)

I always print a "Strength" test, of some sort, such as a 5mm cylinder that's 20mm long. Print it at "reccomended" temps, and print it again at the temp you "think" you want.

If it feels about the same "strength"... chances are you aren't actually hurting the plastic at all.

This video shows what I'm saying in practical application.

Re: Slow flow, printing speed or temperature settings?

I would point a finger at the Ruby then. Just increase the temps.

This or my temperature sensor discrepancy is the right answer.
A couple more test prints today with temperatures 5C to 7C abowe usual settings brought expected results.
Thank you everyone and happy printing.