Power meter

20161114-power-meter-diagram

Parts:

Single plug socket x1
Circuit breaker x1
Plug with three wires x1
Two wires, 30 cm
Power meter x1
Wood piece x1
50 mm screw x6
20 mm Short screw x2
Zip-tie x2

(I used a AC 80-260V 100A BAYITE-PZEM-061 by bayite.)

Tools:

Philips drive
Multimeter
Wire cutter

Testing 60W light bulb’s power

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Input voltage: 229 V
Input current: 0.25 A AC
Power measurement: 56.6 W
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Steel Fisher 3D Printer

I was literally shocked in good sense because the power consumption of Steel Fisher is less than a medium light bulb. This would give me advantage of running a 3D farmer. Five Steel Fishers’ power consumption is about 250 W!

Idle mode: 6.6 W
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Printing mode: 41.0 W to 38.5 W
The maxium power consumption was about 60 W when the hotend was turned on after the printing started.

20161114_0048

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Extreme tests of Steel Fisher

I’m preparining a 3D Farm business. So I’ve been printing difficult models that takes many hours with delicacy.

0.1 mm layer height, 33 hours, KISSlicer
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0.1 mm layer height, 17 hours, KISSlicer
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Lea
http://www.thingiverse.com/thing:620461

13 hours, KISSlicer
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12 hours 49 minutes, KISSlicer
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Before removing the support material
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The contact area of support is dirty.
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A sample print of Lea’s arm. Layer height 0.1 mm with support.
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Persian Spring Vase
http://www.thingiverse.com/thing:753336

A vase with spiral option in Slic3r
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0.2 mm layer height, 2 hours 15 minutes, Slic3r
20161108_0199

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Why you should not buy Makerbot 3D printers!

Source http://www.tridimake.com/2014/06/do-not-buy-makerbot-3d-printers.html

Really! And there are many reasons not to buy: cost, reliability, human values, innovation and so.

I endorse even less Makerbot business
than I already trusted their products !
But enough is enough, this time I say why.

Seriously, Makerbot Industries care more about money than 3D printers. They so badly want your money that they start using dirty business practices. As a client, their overall strategy is simple: you will increasingly pay more to get less. The quality of the product does not count as long as they keep selling it through marketing tricks.

Update (nov. 2014): eventually, well-known resellers of 3D printers like imakr even stopped selling them because of after sale burden and heavy customer negative feedback.

Update (april 2016): interestingly, this post still holds. Makerbot just moved its production to China. A few arguments may be outdated though, so read carefully.

Do not think this is a biased joke, neither only a maker’s rant (as formerly). I really want to warn would-be customers that they should not buy. And I want to try and stay objective.

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Two Voronoi cats

(10/28/2016)

I used Meshmixer to add manual support. The Voronoi cat model took two hours and thirty minutes. laser-cat-sc1

Slic3r 1.2.9 to generate a gcode file without support.laser-cat-slic3r-sc1

Filament: eSun PLA+ 1.75 mm
Temperaure: 185 C
Printing speed: 25 mm/s (Perimeters)

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20161028_0147 20161028_0143

Printing time: 17 hours 31 minutes 15 secondsfisher-sc3

(10/23/2016)

I pushed Steel Fisher to extreme how it would handle a long printing hours that has heavy retraction. The total printing hours was about 33 that kept me awake for two straight nights.

3D Model: LASER CAT – Voronoi Style
http://www.thingiverse.com/thing:179266

Size: 103.09 x 112.91 x 167.1220161022_0761

The first attempt failed, which wasted 1h 38m 55s.
20161022_0108The second attempt failed again at 2h 30m mark.
20161022_0128

The big troublesome question was “How to prevent the nozzle dislocation middle of printing?” And I had been fixated to default Lift Z height in slicer programs that set for Cartesian 3D Printers, which ranges from 0.025 mm to 0.4 mm.

Two days ago I thought ‘Hmm, what if the nozzle goes up and down so high that there is no chance to hit any plastic part? Then it would eliminate the nozzle dislocation, potential print failure.’

Two millimeter was little low, so I set three millimeter as Lift Z height in retraction. Slic3r 1.2.9 hang in the voronoi cat’s gcode generation with support. I used KISSlicer to generate a gcode file of the Voronoi cat with support.

20161022-kisslicer

PLA: eSun 1.75 mm (This one was shitty. I could’ve use another spool of filament)
Temperature: 200 C
Layer height: 0.2 mm
Printing speed: 15 mm/s (perimeter)
Retraction: 3.4 mm (length), 3.0 mm (Lift Z height), 15 mm/s (speed)

; destring_suck = 3.4
; destring_prime = 3.4
; destring_min_mm = 1
; destring_trigger_mm = 100
; destring_speed_mm_per_s = 15
; destring_suck_speed_mm_per_s = 15
; Z_lift_mm = 3
; min_layer_time_s = 10
; wipe_mm = 10

; *** Actual Slicing Settings As Used ***
;
; layer_thickness_mm = 0.2
; extrusion_width = 0.4
; num_ISOs = 3
; wall_thickness = 0.8
; infill_style = 5
; support_style = 2
; solid_interface = 0
; use_lower_interface = 1
; support_angle = 44.9
; destring_min_mm = 1
; stacked_infill_layers = 1
; Perimeter Speed = 10.00
; Loops Speed = 42.50
; Solid Speed = 37.50
; Sparse Speed = 52.50

I started to take photo with one minute interval.
25h 48m 40s
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It finished the printing at 32h 58m 43s.
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The weight of voronoi cat was 55.3 g.
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The weight of support material was 64 g.
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Steel Fisher has outperformed my expectation.

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Original Prusa i3 MK2 – ongoing review

10/20/2016

 PINDA probe, live Z calibration, Z-offset and temperature

http://shop.prusa3d.com/forum/improvements-f14/pinda-probe-live-z-calibration-z-offset-and-temper-t2048.html

So I got thinking on that and figured out that it’s not bed warping, nor the nozzle size change (both factors to consider, but definitely not ‘worth’ 0.3mm), but the temperature sensitivity pf the PINDA probe. The original initialization code heats up the bed first and then homes the axes and does the mesh init. Depending on how far the PINDA probe is from the bed, and what temperature the bed is set to, PINDA probe gets more or less hot.

So, I adjusted the init code as follows:

M115 U3.0.8 ; tell printer latest fw version
; M301 P22.1 I1.80 D68 ; set PID for nozzle - set proper values for your printer and uncomment the line, else just ignore it
M83 ; extruder relative mode
G28 W ; home all without mesh bed level
G0 Z80 Y-3 ; get head above bed to keep it cool, move the nozzle up front to make cleaning easier
M140 S[first_layer_bed_temperature] ; set bed temp
M104 S150 ; set extruder temp to 150C, cold enopugh to avoid ooze, but get some temp on it
M190 S[first_layer_bed_temperature] ; wait for bed temp
M104 S[first_layer_temperature] ; set extruder temp
M109 S[first_layer_temperature] ; wait for extruder temp

; G28 W ; home all without mesh bed level - rehome Y axis to accommodate for thermal expansion -> not necessary, mesh leveling does it too
G80 ; mesh bed leveling
G1 Y-3.0 F1000.0 ; go outside pritn area
G1 X60.0 E9.0 F1000.0 ; intro line
G1 X100.0 E12.5 F1000.0 ; intro line

So, in short: home axes, move Z to 80mm above the bed, heat up everything, only after the temperatures stabilize do a mesh leveling.
Result: instead of having to adjust offset of -0.272mm (good for PLA) to -0.550 (so ∆=280µm) for ABS now I have to adjust it only by about 50µm (to -0.300..320), which is by all means something thermal expansion can be responsible for.

10/19/2016

The plastic spool holder does nasty thing if you don’t watch it carefully.
I got to guide the filament through a ziptie to prevent the filament getting off the spool holder. The spool actually fell into backside of the print bed during a print when the filament tangled.

20161019_0095

I installed the anti-vibration feets. Well it introduces more shakes to the printer frame.20161016_0051

The Z height value for PLA was -0.800 mm.  When I tried to print ABS filament, the Z height was way off. I had to set new Z height using Live Z function on the LCD menu after few hours of multiple printing failures and troubleshooting.

I suspected 100 degrees Celsius might change flatness of the PCB bed and later on the Prusa Research’s technician confirmed it.   Mesh bed leveling can’t fix the deformation caused by 50 degrees Celsius.

I will keep two set of Z height, PLA and ABS-like filament.20161019_0076

I started applying one layer of glue stick over PEI when I print models in ABS filament.

Prusa Research does provide unfriendly service to Linux users. Why? I don’t know. To download Slic3r configuration files, a Linux user need to download Mac OSX’s Slic3r package, decompress it, then copy 30 KB of ini file.

I complained about it once but the drivers’ page hasn’t showed the link of Slic3r configuration file.

However I got to say this 3D Printer delivers decent quality of printing. I’ve printed ABS parts using the Prusa Research’s Slic3r configuration – layer height 0.25 mm. My printed parts looks better than the kit parts. ^^20161019_0107

A section of the part is lifting. How to prevent it?20161020_0116

ABS printed parts for RepRap Fisher 1 3D Printer

20161020_0125

20161020_0127

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Steel Fisher – retraction calibration

I was printing a big model that has heavy support. It had a lot of retraction and during the printing, the nozzle hit a piece, dislocated, then spewing filament in the air. Two hours and 46 minutes of work wasted.

20161019_0108

I’m seriously thinking about exclusively running Prusa i3 MK2 or other Carteisan 3D Printer for printing big models that do not have floating Z axis problem.

Anyway there was strings, blobs all over the model. I decided to do retraction calibration.

After printing 22 calibration objects, I managed to find the best setting of retraction.  The average printing time of the test object was nine minutes.

Extruder drive: B’struder
Kysan Nema 17 5.18:1 geared stepper motor, 2.4 V, 1.0 A

config.g

M201 X4000 Y4000 Z4000 E3000 ; Accelerations (mm/s^2)
M203 X15000 Y15000 Z15000 E15000 ; Maximum speeds (mm/min)
M906 X800 Y800 Z800 E800 ; Set motor currents (mA)
M92 411.230

Retraction setting in Slic3r 1.2.9:
Length: 3.4 mm
Z Lift: 0.4 mm
Speed: 15 mm/s (10 mm/s and 20 mm/s give similar result.)
Retraction after layer change: on
Wipe on retraction: on

Calibration model: http://www.thingiverse.com/thing:909901

I followed Ultimaker’s retraction guide that suggests:
Temperature of PLA: 180 C
Printing speed: 20 mm/s
Travel speed: 200 mm/s

PLA filament temperature: 190 C
All speeds of print moves: 30 mm/s (set the speed factor of DWC at 70%, which makes 21 mm/s.)
Travel speed: 250 mm/s

20161019_0109

20161019_0113

The unexpected result was that 180C had more string than 190C one.20161019_0114

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Anti-vibration foot

Original Prusa i3 MK2

The printing quality is outstanding. I really like it.

http://www.prusa3d.com/wp-content/uploads/i3-antivib.zip

20161016_0051

I gonna modify the model so that I’ll put onn rubber piece between the foot and Y-axis rod.

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