HTD 5M pulley

Component kind htd5m-pulley (category mech, DSL name htd5mPulley, API v1)

Synchronous timing-belt pulley with the HTD 5M profile (5 mm pitch, curved teeth) and optional side flanges. Meshes with HTD5M timing belts; 3D-printable.

Parameters

`teeth` — Tooth count. Pitch diameter = teeth * 5 / pi. Must be >= 8 to keep the groove profile well-formed.
`width` — Total pulley width along the spin axis (mm) — toothed band plus both flanges.
`beltWidth` — Axial length of the toothed band (mm). Match the timing-belt width with a small clearance. Each flange thickness = (width - beltWidth) / 2. Set beltWidth >= width or flangeHeight = 0 to disable flanges.
`flangeHeight` — How far each flange extends radially beyond the toothed OD (mm). Default 3 mm — enough to keep an HTD5M belt seated.
`boreDiameter` — Central bore diameter (mm), for mounting on a shaft.

Parameters schema

Parameter	Type	Default	Constraints
`teeth`	Number	20	min: 8
`width`	Number	12	min: 1
`beltWidth`	Number	9	min: 1
`flangeHeight`	Number	3	min: 0
`boreDiameter`	Number	8
`color`	String	—

Ports

Port	Type	Description
`axis`	`rotational`	Spin axis (rotational). Receives omega from the coupling or belt propagation.

Kinematics

Passive — omega is set by the belt or coupling attached to the axis port. Theta integrates from omega each tick. Two HTD5M pulleys on the same belt ratio by tooth count: omega_to = omega_from * (teeth_from / teeth_to).

Example

htd5mPulley "P1" {
  teeth: 20
  width: 12
  beltWidth: 9
  flangeHeight: 3
  at: position(0, 0, 0)
}

engine apiVersion · 1

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