Motor6D

Inherits from: Motor → JointInstance → Instance → Object

Description

Motor6D joins two BaseParts (Part0 and Part1) together in an animatable way. The Transform property determines the offset between these parts. This can be set manually using RunService.PreSimulation or through an Animator.

Models whose parts are joined by Motor6D are usually referred to as rigs, typically for Humanoids. Motor6D remains appropriate for non-avatar mechanical rigs (doors, turrets, vehicles) where physical simulation is not needed.

Transitioning to AnimationConstraint for Avatar rigs

As of the Avatar Joint Upgrade, R15 player characters spawn with AnimationConstraints instead of Motor6Ds when AvatarJointUpgrade is enabled (the default for new experiences). Code that assumes character joints are Motor6Ds — such as character:FindFirstChildOfClass("Motor6D") or joint:IsA("Motor6D") — will not find joints on upgraded characters. Use AnimationConstraint for new avatar rig code. See the migration notes on the AnimationConstraint page.

Inherits from: Motor

Memory category: BaseParts

Properties

Name	Type / Returns	Description
Motor6D.ChildName	string	Read-only name of the joint's child part, mirroring the `Name` of `Part1`.
Motor6D.ParentName	string	Read-only name of the joint's parent part, mirroring the `Name` of `Part0`.
Motor6D.Transform	CFrame	Describes the current animation offset of the `Motor6D` joint.

Inherited from Motor

Name	Type / Returns	Description
Motor.CurrentAngle	float	Displays the current rotation of the motor in radians.
Motor.DesiredAngle	float	The desired angle to turn the motor to in radians.
Motor.MaxVelocity	float	The maximum velocity the motor can use to reach `Motor.DesiredAngle` measured in radians per physics frame (1/60th of a second).

Inherited from JointInstance

Name	Type / Returns	Description
JointInstance.Active	boolean	Determines if the joint is currently active in the world.
JointInstance.C0	CFrame	Determines how the offset point is attached to `JointInstance.Part0`.
JointInstance.C1	CFrame	Subtracted from the `C0` property to create an offset point for `Part1`.
JointInstance.Enabled	boolean	Sets whether the joint is active or not.
JointInstance.Part0	BasePart	The first `BasePart` that the joint connects.
JointInstance.Part1	BasePart	The second `BasePart` that the joint connects.
JointInstance.part1	BasePart

Inherited from Instance

Name	Type / Returns	Description
Instance.Archivable	boolean	Determines if an `Instance` and its descendants can be cloned using `Instance:Clone()`, and can be saved/published.
Instance.archivable	boolean
Instance.Capabilities	SecurityCapabilities	The set of capabilities allowed to be used for scripts inside this container.
Instance.IsInSandbox	boolean	Indicates whether the instance is inside a sandboxed container.
Instance.Name	string	A non-unique identifier of the `Instance`.
Instance.Parent	Instance	Determines the hierarchical parent of the `Instance`.
Instance.PredictionMode	PredictionMode	Reflects the client-side prediction mode applied to the instance under server-authoritative physics.
Instance.RobloxLocked	boolean	A deprecated property that used to protect `CoreGui` objects.
Instance.Sandboxed	boolean	When enabled, the instance can only access abilities in its `Capabilities` list.
Instance.UniqueId	UniqueId	A unique identifier for the instance.

Inherited from Object

Name	Type / Returns	Description
Object.ClassName	string	A read-only string representing the class this `Object` belongs to.
Object.className	string

Motor6D.ChildName

A read-only string that reflects the Name of the part assigned to Part1 (the joint's child). The value is derived from Part1, so writing to it has no effect. When Part1 is not set, this property is an empty string.

The animation system uses this name to match the joint against the corresponding pose channel in an animation, so a rig's part names must line up with the names authored in its animations.

Field	Value
type	string
tags	["ReadOnly","NotReplicated","NotScriptable"]
security	{"read":"None","write":"None"}
thread safety	ReadSafe
category	Animatable
serialization	{"can_load":false,"can_save":false}
capabilities	["Physics"]

Motor6D.ParentName

A read-only string that reflects the Name of the part assigned to Part0 (the joint's parent). The value is derived from Part0, so writing to it has no effect. When Part0 is not set, this property is an empty string.

The animation system uses this name to match the joint against the corresponding pose channel in an animation, so a rig's part names must line up with the names authored in its animations.

Field	Value
type	string
tags	["ReadOnly","NotReplicated","NotScriptable"]
security	{"read":"None","write":"None"}
thread safety	ReadSafe
category	Animatable
serialization	{"can_load":false,"can_save":false}
capabilities	["Physics"]

Motor6D.Transform

The internal CFrame that is manipulated when a Motor6D is being animated. It is recommended to use this property for custom animations rather than JointInstance.C0 and JointInstance.C1.

Timing

Motor6D transforms are not applied immediately, unlike updating C0 and C1, but rather as a batch in a parallel job after RunService.PreSimulation, immediately before physics steps. The deferred batch update is much more efficient than many immediate updates.

If the Motor6D is part of an animated model with an Animator, then Motor6D.Transform will usually be overwritten every frame by the Animator after RunService.PreAnimation and before RunService.PreSimulation.

Field	Value
type	CFrame
tags	["Hidden","NotReplicated"]
security	{"read":"None","write":"None"}
thread safety	ReadSafe
category	Data
serialization	{"can_load":false,"can_save":false}
capabilities	["Physics"]
simulationAccess	true

Methods

Inherited from Motor

Name	Type / Returns	Description
Motor:SetDesiredAngle	()	Sets `Motor.DesiredAngle` of the motor.

Inherited from Instance

Name	Type / Returns	Description
Instance:AddTag	()	Applies a tag to the instance.
Instance:children	Instances	Returns an array of the object's children.
Instance:ClearAllChildren	()	This method destroys all of an instance's children.
Instance:Clone	Instance	Create a copy of an instance and all its descendants, ignoring instances that are not `Archivable`.
Instance:clone	Instance
Instance:Destroy	()	Sets the `Instance.Parent` property to `nil`, locks the `Instance.Parent` property, disconnects all connections, and calls `Destroy()` on all children.
Instance:destroy	()
Instance:FindFirstAncestor	Instance?	Returns the first ancestor of the `Instance` whose `Instance.Name` is equal to the given name.
Instance:FindFirstAncestorOfClass	Instance?	Returns the first ancestor of the `Instance` whose `Object.ClassName` is equal to the given className.
Instance:FindFirstAncestorWhichIsA	Instance?	Returns the first ancestor of the `Instance` for whom `Object:IsA()` returns true for the given className.
Instance:FindFirstChild	Instance?	Returns the first child of the `Instance` found with the given name.
Instance:findFirstChild	Instance
Instance:FindFirstChildOfClass	Instance?	Returns the first child of the `Instance` whose `ClassName` is equal to the given class name.
Instance:FindFirstChildWhichIsA	Instance?	Returns the first child of the `Instance` for whom `Object:IsA()` returns true for the given className.
Instance:FindFirstDescendant	Instance?	Returns the first descendant found with the given `Instance.Name`.
Instance:GetActor	Actor?	Returns the `Actor` associated with the Instance, if any.
Instance:GetAttribute	Variant	Returns the value which has been assigned to the given attribute name.
Instance:GetAttributeChangedSignal	RBXScriptSignal	Returns an event that fires when the given attribute changes.
Instance:GetAttributes	Dictionary	Returns a dictionary of the instance's attributes.
Instance:GetChildren	Instances	Returns an array containing all of the instance's children.
Instance:getChildren	Instances
Instance:GetDebugId	string	Returns a coded string of the debug ID used internally by Roblox.
Instance:GetDescendants	Instances	Returns an array containing all of the descendants of the instance.
Instance:GetFullName	string	Returns a string describing the instance's ancestry.
Instance:GetStyled	Variant	Returns the styled or explicitly modified value of the specified property, or else the default property value if it hasn't been styled/modified.
Instance:GetStyledPropertyChangedSignal	RBXScriptSignal	Returns an event that fires when the given style property changes on the instance.
Instance:GetTags	Array	Gets an array of all tags applied to the instance.
Instance:HasTag	boolean	Check whether the instance has a given tag.
Instance:IsAncestorOf	boolean	Returns true if an `Instance` is an ancestor of the given descendant.
Instance:IsDescendantOf	boolean	Returns `true` if an `Instance` is a descendant of the given ancestor.
Instance:isDescendantOf	boolean
Instance:IsPropertyModified	boolean	Returns `true` if the value stored in the specified property is not equal to the code-instantiated default.
Instance:QueryDescendants	Instances	Returns an array containing all descendants of the instance that match the `selector` string.
Instance:Remove	()	Sets the object's `Parent` to `nil`, and does the same for all its descendants.
Instance:remove	()
Instance:RemoveTag	()	Removes a tag from the instance.
Instance:ResetPropertyToDefault	()	Resets a property to its default value.
Instance:SetAttribute	()	Sets the attribute with the given name to the given value.
Instance:WaitForChild	Instance	Returns the child of the `Instance` with the given name. If the child does not exist, it will yield the current thread until it does.

Inherited from Object

Name	Type / Returns	Description
Object:GetPropertyChangedSignal	RBXScriptSignal	Get an event that fires when a given property of the object changes.
Object:IsA	boolean	Returns true if an object's class matches or inherits from a given class.
Object:isA	boolean

Events

Inherited from Instance

Name	Type / Returns	Description
Instance.AncestryChanged		Fires when the `Instance.Parent` property of this object or one of its ancestors is changed.
Instance.AttributeChanged		Fires whenever an attribute is changed on the `Instance`.
Instance.ChildAdded		Fires after an object is parented to this `Instance`.
Instance.childAdded
Instance.ChildRemoved		Fires after a child is removed from this `Instance`.
Instance.DescendantAdded		Fires after a descendant is added to the `Instance`.
Instance.DescendantRemoving		Fires immediately before a descendant of the `Instance` is removed.
Instance.Destroying		Fires immediately before (or is deferred until after) the instance is destroyed via `Instance:Destroy()`.
Instance.StyledPropertiesChanged		Fires whenever any style property is changed on the instance, including when a property is set to `nil`.

Inherited from Object

Name	Type / Returns	Description
Object.Changed		Fires immediately after a property of the object changes, with some limitations.