How to make a moving platform in Roblox Studio

Why players slide off tweened platforms

Roblox's physics moves what stands on a part using that part's velocity. An anchored part moved by TweenService is moved by setting its position every frame: it gets to the new place, but its velocity stays zero, so a character on it is not carried, and on a fast tween can fall through or be left behind. An unanchored part moved by a constraint really moves, with a velocity, and carries characters with friction like a real floor.

Step 1: The platform script

1. Insert a Part about 10, 1, 10 where the platform should start. It can be anchored while you build: the script unanchors it.
2. Add an attribute: Attributes, +, name Travel, type Vector3, value such as 0, 0, 30 (30 studs along Z) or 0, 20, 0 for a lift.
3. Insert a Script inside the part named MovingPlatform:

-- Script inside a platform part, named MovingPlatform.
-- Moves the platform back and forth with physics, so players standing on it ride
-- along. Set a Vector3 attribute "Travel" on the part, e.g. 0, 0, 30 for 30 studs along Z.
local SPEED = 8 -- studs per second
local PAUSE_SECONDS = 2 -- wait at each end

local platform = script.Parent :: BasePart
local travelAttr = platform:GetAttribute("Travel")
local travel = if typeof(travelAttr) == "Vector3" then travelAttr else Vector3.new(0, 0, 30)

local startCFrame = platform.CFrame
local startPosition = startCFrame.Position
local endPosition = startPosition + travel

-- The platform is moved by physics, not by changing its position, so it must not be anchored
platform.Anchored = false

local attachment = Instance.new("Attachment")
attachment.Parent = platform

-- AlignPosition pulls the platform toward a point, at no more than SPEED
local mover = Instance.new("AlignPosition")
mover.Mode = Enum.PositionAlignmentMode.OneAttachment
mover.Attachment0 = attachment
mover.Position = startPosition
mover.MaxVelocity = SPEED
mover.MaxForce = math.huge
mover.Responsiveness = 200
mover.Parent = platform

-- AlignOrientation keeps it flat and stops it from spinning
local holder = Instance.new("AlignOrientation")
holder.Mode = Enum.OrientationAlignmentMode.OneAttachment
holder.Attachment0 = attachment
holder.CFrame = startCFrame.Rotation
holder.MaxTorque = math.huge
holder.Responsiveness = 200
holder.Parent = platform

-- The server always moves it, so it does not stutter when a different player gets near
platform:SetNetworkOwner(nil)

local distance = travel.Magnitude
local target = endPosition
while true do
	mover.Position = target
	-- Wait about as long as the trip takes, then pause
	task.wait(distance / SPEED + PAUSE_SECONDS)
	target = if target == endPosition then startPosition else endPosition
end

AlignPosition in OneAttachment mode pulls the platform's attachment toward the point in its Position property, never faster than MaxVelocity. MaxForce is unlimited so players' weight cannot hold it down. AlignOrientation holds the starting rotation, so the platform stays level when a player lands on one edge. The loop switches the target, waits for the trip plus the pause, and switches back.

SetNetworkOwner(nil) keeps the server simulating the platform. Otherwise Roblox may hand an unanchored part to the device of a nearby player, and the handover can make the platform jump. Roblox's network ownership page suggests this for gameplay-critical parts, and also says to use it conservatively, since it can make physics feel less smooth for players.

Lifts, loops and timing

• A lift: set Travel to 0, 20, 0. AlignPosition holds it up against gravity, so it works vertically too.
• A route with more stops: replace the two points with a list of positions and step through it.
• A platform that waits for a player: start the loop only after a Touched from a character, as in a teleporter pad.
• Many platforms: copy the part with the Script inside. Each one reads its own Travel attribute.

Test it

1. Press Play. The platform moves 30 studs, pauses 2 seconds and comes back.
2. Jump on and stand still: you ride along without walking.
3. Walk around on it while it moves: you stay on.
4. Set Travel to 0, 20, 0 and ride it up as a lift.

Common errors and fixes

If the platform does not move, check the Output window first.

Build it with RoCode

If you would rather not set this up by hand, RoCode can build it in the place you have open. RoCode is an independent AI agent for Roblox Studio, not made by Roblox: you describe the change in a web chat, and its Studio plugin creates the parts and scripts in your Explorer.

After a build, RoCode can run its test robot: it plays your game in Studio, walks and jumps, and reports PASS or FAIL. It checks only what it chose to test, so ride the platforms yourself. How RoCode connects to Studio.

Questions

Sources and further reading

• Roblox Creator Docs: AlignPosition. OneAttachment mode, MaxVelocity and MaxForce
• Roblox Creator Docs: AlignOrientation. holding the rotation
• Roblox Creator Docs: Network ownership. SetNetworkOwner(nil) and when to use it
• Roblox Creator Docs: PrismaticConstraint. the sliding alternative

How the code was checked: every script on this page passes Luau's strict type checker against Roblox's API definitions (luau-lsp, 23 October 2026). A type check catches misspelt APIs and wrong types, not game logic, so playtest in Studio before you publish.