Robobot hardware
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* Plastic thickness is 6mm in most cases. | * Plastic thickness is 6mm in most cases. | ||
| − | ==Screws for plastic (PT | + | ==Screws for plastic (PT screws)== |
Mounting items on the 3D printed plastic should use plastic screws. | Mounting items on the 3D printed plastic should use plastic screws. | ||
| − | Plastic screws: | + | Plastic (PT) screws: |
| − | * Cut into the plastic with a sharp thread. | + | * Cut into the plastic with a sharp high-pitch thread. |
| − | * Gets locked | + | * Gets locked into the plastic. |
| − | PT | + | Plastic (PT) screw selection: |
* Pan-head 3mm diameter and length: | * Pan-head 3mm diameter and length: | ||
** 6mm, 10, 14mm, 18mm | ** 6mm, 10, 14mm, 18mm | ||
* Countersunk 3mm | * Countersunk 3mm | ||
** 10mm, 14mm | ** 10mm, 14mm | ||
| + | |||
| + | [[File:PT-screw.png]] | ||
==Screws for metal== | ==Screws for metal== | ||
Revision as of 15:57, 30 October 2023
Back to Robobot B
Contents |
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 plastic should use plastic 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 3mm diameter and length:
- 6mm, 10, 14mm, 18mm
- Countersunk 3mm
- 10mm, 14mm
Screws for metal
Mounting of motors and other metal parts should use screws for metal.
Metal screw selection:
- M3 pan head
- M3 countersunk (for e.g. motor mount)
- M6 bolt, length 40mm?
Most screws for metal have a Umbraco (Allan) type drive.
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 2, 2.5, 3, 4mm)
- Cross PH (Philips type) is not used much (size PH0, PH1, PH2).
- Cross PZ (Pozidrive) is the most common for cross-drive (size PZ0, PZ1, PZ2).
- 6-lobe or (Tork) (size T10, T15, T20)
