Small Detail Extruder

Re: Small Detail Extruder

Dirty Steve — Thu, 17 Jan 2013 22:02:55 -0500

The GT2 belts will help. I recently switched from T5 as well.

Stringing is usually caused noozle ooze. Maybe lower your temperature a little. One thing that would help Slic3r would be if they added a wipe function. KISSlicer and Skeinforge that will wipe the nozzle inside the print before moving to another print area. Maybe if your extruder gears have a lot of play between each other it could be some extruder backlash, but I've not read or seen anywhere of extruder backlash being an issue for anyone.

Stringing issues vary by materials and hot end designs.

Re: Small Detail Extruder

N314 — Thu, 17 Jan 2013 21:52:39 -0500

//It's a little hard to see in the first photo but are you getting an offset in the middle of your horizontal holes, but not dropping stepps during printing? If //so that would be backlash.

If it is back lash ill find out soon. This weekend i was planning on replacing my 5mm belts with GT2's.

Also what about those tiny stringy defects. Would those be possibly caused by backlash?

-Nick

Re: Small Detail Extruder

Dirty Steve — Thu, 17 Jan 2013 20:26:21 -0500

I did have a set of helical cut aluminum couplers. They were designed for 5mm motor shaft and 8mm rod, but being in the US, I'm using 5/16" rod, so the couplers would not correctly center the rod to the motor shaft.

I ended up printing a rigid set of couplers and that almost completely removed Z-wobble on my machine.

It's a little hard to see in the first photo but are you getting an offset in the middle of your horizontal holes, but not dropping stepps during printing? If so that would be backlash.

Re: Small Detail Extruder

N314 — Thu, 17 Jan 2013 20:02:29 -0500

Oh boy... ive been through that. Any suggestions you have for that... Ive tried every [somewhat easy] way in the book.

-Nick

Re: Small Detail Extruder

Dirty Steve — Thu, 17 Jan 2013 19:46:18 -0500

Looks like Z-wobble.

Re: Small Detail Extruder

N314 — Thu, 17 Jan 2013 18:54:56 -0500

Well ive been too busy to print the hand, but im starting to think small defects are more an entire print problem, not just small features.

I hot you can tell from the photos below that im not getting perfect nice faces, theres tiny defects that make it kook sorta messy in general.

What is causing this/can be done about said issue?

-Nick

Re: Small Detail Extruder

fma — Tue, 15 Jan 2013 02:25:36 -0500

ABS/PLA quality is also a very important factor when printing small parts.
Cooling too!

Re: Small Detail Extruder

Dirty Steve — Sun, 13 Jan 2013 23:50:02 -0500

hand.stl

Re: Small Detail Extruder

N314 — Sun, 13 Jan 2013 18:24:46 -0500

@ Dirty Steve

Can you send me the STL or a link to that hand so I can print a comparison?

-Nick

Re: Small Detail Extruder

Dirty Steve — Sun, 13 Jan 2013 14:38:43 -0500

@xclusive585

ABS print

Re: Small Detail Extruder

jcabrer — Sun, 13 Jan 2013 14:34:34 -0500

There is a limit to the level of detail that can be acheived using FDM. It has a lot to do with the viscosity of the material when it is being laid down. As you print, and the nozzle moves around, it tugs at the plastic, causing the details to blur.

Yes, you can go to a finer layer height, but you have the bed, and each previous solidified layer to help keep everything in place. There is no such mechanisim for X and Y, so you are looking at something around 0.3mm as the smallest identifiable feature, regardless of the nozzle size. YMMV.

Re: Small Detail Extruder

xclusive585 — Sun, 13 Jan 2013 14:17:37 -0500

Dirty Steve Wrote:
-------------------------------------------------------
> Have any pics? I'm running a .25mm nozzle, .1mm
> layer, and getting pretty good detail. The fingers
> in this image are about .6-.75mm.

wow. Now I want a .25 nozzle on my next build.... Nice.
Curious if that's ABS or PLA and 1.75 or 3mm filament?

Re: Small Detail Extruder

Logrod — Sun, 13 Jan 2013 13:01:42 -0500

What height:width ratio are you running (or are you allowing Slic3r to decide?) ?

Re: Small Detail Extruder

Dirty Steve — Sun, 13 Jan 2013 12:57:42 -0500

Have any pics? I'm running a .25mm nozzle, .1mm layer, and getting pretty good detail. The fingers in this image are about .6-.75mm.

Small Detail Extruder

N314 — Sun, 13 Jan 2013 12:53:26 -0500

Hi-

I recently switched out my .35mm hotend for a .25mm one.

Its generally working well, but small details (<~5mm) isnt the best. My printer can move to accuracies within 0.05-0.1mm accuracy, but small details come out dirty. How can I fix this.

CONFIG File for Slic3r:

layer_height = .15
max_fan_speed = 100
min_fan_speed = 35
min_print_speed = 10
min_skirt_length = 0
notes =
nozzle_diameter = .25
only_retract_when_crossing_perimeters = 0
output_filename_format = [input_filename_base].gcode
perimeter_acceleration = 25
perimeter_extruder = 1
perimeter_extrusion_width = 0
perimeter_speed = 30
perimeters = 2
post_process =
print_center = 75,75
randomize_start = 1
retract_before_travel = 2
retract_length = 1
retract_length_toolchange = 3
retract_lift = 0
retract_restart_extra = 0
retract_restart_extra_toolchange = 0
retract_speed = 30
rotate = 0
scale = 1
skirt_distance = 6
skirt_height = 1
skirts = 1
slowdown_below_layer_time = 15
small_perimeter_speed = 30
solid_fill_pattern = rectilinear
solid_infill_below_area = 75
solid_infill_every_layers = 0
solid_infill_speed = 60
start_gcode = G28 ; home all axes
support_material = 1
support_material_angle = 0
support_material_extruder = 1
support_material_extrusion_width = 0
support_material_pattern = rectilinear
support_material_spacing = 2
support_material_speed = 60
support_material_threshold = 45
temperature = 188
threads = 2
top_solid_infill_speed = 50
top_solid_layers = 3
travel_speed = 130
use_relative_e_distances = 0
vibration_limit = 0
z_offset = 0

Any advice or ideas are greatly appreciated.

-Nick