Strange camera rotation on low framerate

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#1

I’m currently having issues with some random spring module and camera.
This spring module works same on different framerate but there’s some problems…

Recoil starts to look strange on 60 FPS, and i don’t know how to fix it.

How it looks on 60 FPS:

How it looks on 240 FPS:

As you see, camera Z rotation is really high on low framerate.

Spring module:

local RunService = game:GetService('RunService')

-- Config
local Iterations = 8
local curr_Delta = 0

-- Module
local SpringModule = {}

-- Functions
function SpringModule.new(self, Mass, Force, Damping, Speed)
	local Spring = {
		Target      = Vector3.new(),
		Position    = Vector3.new(),
		Velocity    = Vector3.new(),

		Mass        = Mass or 5,
		Force       = Force or 50,
		Damping     = Damping or 4,
		Speed       = Speed  or 4,
	}

	function Spring.shove(self, Force)
		local X, Y, Z = Force.X, Force.Y, Force.Z

		if X ~= X or X == math.huge or X == -math.huge then
			X = 0
		end

		if Y ~= Y or Y == math.huge or Y == -math.huge then
			Y = 0
		end

		if Z ~= Z or Z == math.huge or Z == -math.huge then
			Z = 0
		end

		local EndVector = Vector3.new(X, Y, Z)
		self.Velocity = self.Velocity + (curr_Delta * 60) * EndVector
	end

	function Spring.update(self, Delta)
		local ScaledDeltaTime = Delta * self.Speed / Iterations
		curr_Delta = Delta

		for Index = 1, Iterations do
			local IterationForce = self.Target - self.Position
			local Acceleration = (IterationForce * self.Force) / self.Mass

			Acceleration = Acceleration - self.Velocity * self.Damping

			self.Velocity = self.Velocity + Acceleration * ScaledDeltaTime
			self.Position = self.Position + self.Velocity * ScaledDeltaTime
		end

		return self.Position
	end

	return Spring
end

-- Return
return SpringModule

Update recoil lines:

local updatedRecoil = self.springs.recoil:update(dt)*5
		camera.CFrame *= CFrame.new(0, 0, -updatedRecoil.Z*8) * CFrame.Angles(updatedRecoil.X/1.5, -updatedRecoil.Y, -updatedRecoil.Z*4)

Shoving spring:

local newRecoil = Random.new():NextNumber(self.lastObjects.lastRecoil.min, self.lastObjects.lastRecoil.max)
	
	self.springs.recoil.Speed = 22
	self.springs.recoil:shove(Vector3.new(newRecoil/75,
		Random.new():NextNumber(-3/weaponData.recoil.max, 3/weaponData.recoil.max)/60, 
		newRecoil/30
		)/4)