Robobot hardware: Difference between revisions

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==Screws for plastic (PT screws)==
==Screws for plastic (PT screws)==


Mounting items on the 3D printed plastic should use plastic screws.
Mounting items on the 3D-printed thermoplastic should use plastic (PT) screws.


Plastic (PT) screws:
Plastic (PT) screws:
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Plastic (PT) screw selection:
Plastic (PT) screw selection:
* Pan-head 3mm diameter and length:
* 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
** 6mm, 10, 14mm, 18mm
* Countersunk 3mm
* Countersunk 3mm

Revision as of 09:04, 2 November 2023

Back to Robobot B

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 (Man wheel fastner, 16mm, Hex/Umbraco 4mm)
  • 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)