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Assembled with printed lock washers without need of screws - optional with motor upgrade.Toys
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http://www.thingiverse.com/thing:468872 with replications on different 3D printers + latest STL file updates!
This Spider Rover can be simply clicked together with one and the same lock washer type. No screws required. Just in case you want to do more extensive research with it, you can add a motor. Pulley is in the files. The silver spider rover is 50% scaled down (not motorized), which needs the different named worm_gear_scaling.stl.
Be adviced that you have to be good in what you are doing when you start scaling down below 80% or if you add a motor to get it walking!Printed on Ultimaker²
Used UM2 Cura 14.07 settings:
Layer height (mm): 0.1
Shell thickness (mm): 0.3
Enable retraction: yes
Bottom/top thickness(mm): 1
Fill Density (%): 100
Speed and Temperatur
Print speed (mm/s): 50
Support type: None
Platform adhesion type: None (e.g. leg_shoulder.stl could require Brim)
Nozzle size(mm): 0.3 (yes 0.3 - you can check gcode with Repetier-Host)
Initial layer thickness (mm): 0.3 (shows yellow)
Initial layer line with (%): 100
Cut off object bottom (mm): 0.0
Dual extrusion overlap (mm): 0.15
Travel speed (mm/s): 150.0
Bottom layer speed (mm/s): 20
Infill speed (mm/s): 80.0
Outer shell speed (mm/s): 50.0
Inner shell speed (mm/s): 70.0
Minimal layer time (sec): 5
Enable cooling fan: yes
UM2 feeder underextrusion through moved hobbed
pulley to the outer side on the motor shaft. Followed by slight ticking sound.
Moved hobbed pulley back about 2.5mm. Last step of filament change has to give you a hard powerful knocking sound when new filament
is coming out of the nozzle (before you then select PLA/ABS type)
For example crazy 50% - It's easier to scale all leg_pins_..stl to 0.48 for X/Y and Z=0.5 instead doing sanding. For 1:1 no sanding is required !
If you really have to do sanding - use a common nail file.
Materials and methods
Printed in PLA
If you want to build in a motor you need to add ball bearings for the worm gear.
I'm open to suggestions for motor and ball bearing types. The middle plate might therefore be added with different mounts.
From the uploaded pictures you will see
used ball bearings 14x8x4mm. Motor is 1:50 gear motor IGARASHI TYP 20G-50.
It's slow but i runs with 2x 9V/109mA solar cells.
1x optional_motor_belt_pulley.stl (only for motor)
1x worm_gear.stl (not scale, motor)
1x worm_gear_scaling.stl (small scaling)
1x deck_bottom_worm_gear.stl (bearing, motor)
1x deck_bottom_worm_gear_dummy.stl (no bearing, no motor)
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