GuiCommand: Name: FCGear CycloidRack MenuLocation: Gear , Cycloid Rack Workbenches: FCGear_Workbench Shortcut: None Version: 1.0 SeeAlso: FCGear_CycloidGear

FCGear CycloidRack

Description

Cycloid racks from left to right: Spur gearing, helical gearing, double helical gearing

Usage

1. Switch to the FCGear Workbench.
2. There are several ways to invoke the command:
   • Press the [ Cycloid Rack button in the toolbar.
   • Select the Gear → [ Cycloid Rack option from the menu.
3. Change the gear parameter to the required conditions (see Properties).

Properties

An FCGear CycloidRack object is derived from a Part Feature object and inherits all its properties. It also has the following additional properties:

{{Properties_Title|accuracy}}

• numpoints|Integer: Default is {{value|15}}. Number of points for spline.

{{Properties_Title|base}}

• add_endings|bool: If {{True}} (default), then the total length of the rack is teeth * pitch. If {{False}}, then the rack starts with a tooth-flank.

• height|Length: Default is {{value|5 mm}}. Value of the gear width.

• teeth|Integer: Default is {{value|15}}. Number of teeth.

• thickness|Length: Default is {{value|5 mm}}. Thickness of the uncut part of the rack.

{{Properties_Title|computed}}

• transverse_pitch|Length: (read-only) Pitch in the transverse plane.

{{Properties_Title|cycloid}}

• inner_diameter|Float: Default is {{value|7.5}}. Diameter of the rolling circle of hypocycloid, normalized by the module (see Notes).

• outer_diameter|Float: Default is {{value|7.5}}. Diameter of the rolling circle of epicycloid, normalized by the module (see Notes).

{{Properties_Title|fillets}}

• head_fillet|Float: Default is {{value|0}}.

• root_fillet|Float: Default is {{value|0}}.

{{Properties_Title|helical}}

• beta|Angle: Default is {{value|0 °}}. With the helix angle β a helical gear is created (positive value → rotation direction right, negative value → rotation direction left).

• double_helix|Bool: Default is {{false}}, {{true}} creates a double helix gear (see Notes).

{{Properties_Title|involute}}

• module|Length: Default is {{value|1 mm}}. For racks the module equals the pitch and so is the distance between corresponding points on adjacent teeth (see Notes).

{{Properties_Title|precision}}

• simplified|Bool: Default is {{false}}. If {{true}} the rack is drawn with a constant number of teeth to avoid topological renaming.

{{Properties_Title|tolerance}}

• clearance|Float: Default is {{value|0.25}} (see Notes).

• head|Float: Default is {{value|0}}. Additional length of the tip of the teeth, normalized by the module.

{{Properties_Title|version}}

• version|String:

Notes

See FCGear CycloidGear.

Useful formulas

See FCGear CycloidGear.

Scripting

⏵ documentation index > Addons > FCGear > External Command Reference > FCGear CycloidRack

This page is retrieved from https://github.com/FreeCAD/FreeCAD-documentation/blob/main/wiki/FCGear_CycloidRack.md