Robobot hardware

Revision as of 09:06, 2 November 2023

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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)