Robobot hardware
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Hardware
Mounting holes
The hardware is 3D-printed plastic (except for the electronics and screws)
All 3D printed parts have holes for mounting additional parts. These holes have:
- Individual hole distance of 1cm.
- Hole diameter of 2.5mm, intended for 3mm plastic screws.
- Plastic thickness is 6mm in most cases.
Screws for plastic (PT screws)
Mounting items on the 3D-printed thermoplastic should use plastic (PT) screws.
Plastic (PT) screws:
- Cut into the plastic with a sharp high-pitch thread.
- Gets locked into the plastic.
Plastic (PT) screw selection:
- Pan-head 2.5mm for PCB mounting, length 8mm, Torx 8IP/TX8.
- Countersunk 3mm length 10mm, TX8, for the most plastic-plastic mount, where head height is important.
- Pan head 3mm, length 10mm, TX10, for the most plastic-plastic mount, with space for the head.
- Pan head 3mm, length 16mm, TX10, for servo arm 'axle'.
- Countersunk 3mm, length 25mm, TX8, box lit 'bearing' and camera mount.
- 6mm, 10, 14mm, 18mm
- Countersunk 3mm
- 10mm, 14mm
Pan head screw for thermoplastic.
Screws for metal
Mounting of motors and other metal parts should use screws for metal.
Metal screw selection:
- M3 pan head (servo horn 16mm, Torx TX10)
- M3 countersunk (motor mount 12mm, Torx TX10)
- M5 bolt (For the main wheel fastner, 16mm, Hex/Umbraco 4mm)
- M5 nut (For the main wheel fasten).
- M6 bolt (Castor axles, length 50mm, Hex/Umbraco 5mm)
Screw drive type
We could, unfortunately, not standardize on one type of screw drive type.
Drive types used:
- Umbraco (Allan) type: plane hexagonal drive and tool (mostly 3, 4 and 5mm)
- Cross PH (Philips type) is not used much (size PH0, PH1, PH2).
- Cross PZ (Pozidrive) is not used much (size PZ0, PZ1, PZ2).
- 6-lobe or (Tork) (size T08 and T10 are used)
