Table of Contents
- What DMX Follow Spot Control From a Phone Actually Does
- Why the Control Sets Speed, Not Position
- Setting Up Follow Spot Control on Your Moving Head
- Sensitivity: Getting the Speed Right for Your Room
- Fixtures Hung Upside Down: Inverting the Controls
- Using an Xbox or PlayStation Controller
- Follow Spot Lighting for Churches and Small Venues
- Troubleshooting Drift, Lag and Juddering
- Conclusion
- Frequently Asked Questions
DMX follow spot control from a phone lets one person keep a moving head on a speaker, a singer or a bride as they walk, using nothing but a browser and a thumb. No console, no second operator perched on a platform, and no expensive dedicated follow spot fixture with someone standing behind it.
This guide covers how live manual control of a moving head works, how to set it up on an existing rig, and how to get it accurate enough to hold a beam on a face at the back of a room.
What DMX Follow Spot Control From a Phone Actually Does
Most lighting software gives you scenes and cues: preset looks you recall at the right moment. That covers almost everything, right up to the moment somebody moves. A saved position cannot follow a pastor who walks off the platform into the congregation, or a performer who steps downstage for a solo.
A follow spot control gives you live manual steering of a fixture. You open a page on your phone, pick the moving head, and push a virtual thumbstick in the direction you want the beam to travel. It moves while you hold, and stops when you let go ΓÇö the same behaviour as the joystick on a lighting console, delivered on a device already in your pocket.
Because it runs in a browser on your local network, the operator is not tied to the booth. They can stand at the back of the room, or at the side of the stage where they can actually see the person they are lighting, which is where a follow spot operator has always wanted to be.
Why the Control Sets Speed, Not Position
This is the single most important thing to understand, and it is where most touchscreen lighting controls get it wrong.
A control that maps your finger's position onto the fixture's position seems obvious. Touch the top left of the pad, the beam goes to the top left of the room. It demonstrates beautifully. It is unusable in practice.
The reason is that you do not know, in the moment, exactly where on the pad "the third pew, house left" is. You would have to translate from where the person is standing to a coordinate on a small piece of glass, and get it right first time, in the dark, while they keep walking. Miss, and the beam jumps somewhere wrong in front of a full room.
Velocity control removes the translation entirely. You push in the direction the person is moving, at roughly the speed they are moving, and adjust as you watch. You are never asked where anything is on an abstract grid ΓÇö only which way to nudge. It is the same reason every lighting console, camera gimbal and PTZ controller uses a spring-return joystick rather than a touch surface.
The practical result: push and hold to move, let go and the light stops exactly where it is. It does not spring back to centre and it does not jump.
Setting Up Follow Spot Control on Your Moving Head
Setup takes about a minute on a rig that is already patched.
- Patch the moving head if you have not already. Pick the model from the fixture library and give it its DMX start address. The software reads its pan and tilt channels from the profile.
- Open the Follow Spot page on a phone or tablet connected to the same network as the hub.
- Choose the fixture from the dropdown. Moving heads are marked as such.
- Push and hold on the round pad. The beam travels. Let go and it stops.
On a phone, the stick is floating: wherever your thumb first lands becomes the centre. You are never hunting for a control in the dark ΓÇö the control comes to your thumb.
There is a second mode worth knowing about. Track mode is the stick described above. Aim mode turns the same pad into a map of the fixture's full travel, so you can tap a fixed mark ΓÇö a lectern, a door, a step ΓÇö and send the beam straight there. Two different jobs, two different controls, the way a console offers both.
Sensitivity: Getting the Speed Right for Your Room
The speed setting decides how far the fixture travels per second at full deflection, and it is the difference between a control that feels natural and one that fights you.
- Overshooting the person constantly? Turn the speed down. A small room or a short throw needs far less than the default.
- Cannot keep up with someone walking? Turn it up.
- Following fine, but cannot settle on their face? Turn on fine control. It drops to a quarter speed for the last small correction, which is the part that decides whether a beam looks intentional or nervous.
The default crosses the fixture's full range in about three seconds ΓÇö fast enough to catch a brisk walk, slow enough to stay on someone once you have them. There is also a deadzone at the centre of the pad, so a resting thumb does not drift the beam across the stage over the course of a sermon.
For a long throw, check whether your fixture has 16-bit pan and tilt ΓÇö a pan fine and tilt fine channel pair. Software that drives those gets 65,536 steps of travel instead of 256. At the back of a large room, 8-bit control means the smallest possible correction is a visible jump; 16-bit means it is invisible.
Fixtures Hung Upside Down: Inverting the Controls
A mover hung from a truss moves the opposite way to one standing on the floor. Push right, and the beam goes left. This catches everyone once.
The fix is a single switch ΓÇö mark the fixture as hung upside down, and pushing right sends the beam right again. There are separate switches for inverting pan and tilt individually, for a fixture that is simply facing the other way.
Set these per fixture, not globally. A typical rig has one mover hung and another on the floor, and a single global invert would drive those two in opposite directions the moment you selected them together ΓÇö which is exactly the situation you cannot debug in the middle of a service. Per-fixture settings are saved, so you set them once when the light is rigged and never think about it again.
Using an Xbox or PlayStation Controller
For anyone lighting a longer show, a physical stick beats glass. Plug a standard game controller into the hub and it is detected automatically ΓÇö no pairing screen, no driver install, no mapping file to write.
- Left stick ΓÇö pan and tilt
- Right stick ΓÇö zoom and focus, on fixtures that have them
- Triggers ΓÇö dimmer up and down
- Left bumper ΓÇö hold for fine control
- Y ΓÇö snap back to centre
A game controller costs a fraction of a dedicated console wing, and volunteers already know how to hold one. That last point matters more than it sounds: a control surface somebody is already fluent with removes an entire training session from your onboarding.
Follow Spot Lighting for Churches and Small Venues
A traditional follow spot means a dedicated fixture, a platform to put it on, and a person standing behind it for the whole service. Most churches and small venues have none of those three, which is why the pastor walks out of the light.
Using a moving head you already own, steered from a phone, changes the arithmetic. The operator can be the same volunteer already running scenes from the sound booth, or someone sitting in the congregation with a phone. The fixture goes back to being part of a scene the moment you release it.
It is also the answer for a wedding or a school production where the rig is whatever the venue has. Any moving head with pan and tilt becomes a follow spot for the ten minutes you need one.
Troubleshooting Drift, Lag and Juddering
The beam keeps moving after I let go. Some systems keep integrating the last stick reading until a new one arrives. Well-behaved software springs the input back to centre within a fraction of a second if the page stops reporting ΓÇö so a phone that sleeps, or wifi that drops mid-push, stops the light rather than letting it sail off the stage.
The fixture judders. Almost always two sources fighting for the same channels ΓÇö a control page and a scene both writing pan and tilt. Selecting a fixture for manual control should take ownership of it and stop other screens writing, which removes the conflict at its source.
There is noticeable lag. Check you are on the same local network as the hub, not routed through a guest VLAN or a repeater. Manual steering is a local-network job; a round trip through the internet is visible in your hand.
Small corrections arrive as jumps. That is 8-bit control on a long throw. Check whether your fixture profile includes the fine pan and tilt channels, and that your software is driving them.
Conclusion
Live manual control fills the one gap that scenes and cues cannot: a person who moves. Velocity control rather than position mapping is what makes it usable under pressure, per-fixture rigging settings are what keep it correct across a mixed rig, and sensible sensitivity is what makes a beam look intentional.
If you already own a moving head and a hub on your network, you already own a follow spot. It just needs a control that behaves the way a follow spot has always behaved.
Frequently Asked Questions
Q: Can I control a DMX moving head from my phone?
Yes. With a DMX controller on your network, a browser on your phone can steer a moving head live ΓÇö pan, tilt, and on many fixtures zoom, focus and dimmer as well. No app install is needed; it is a web page on your local network.
Q: What is the difference between a follow spot and a moving head?
A traditional follow spot is a dedicated fixture aimed by hand, with an operator behind it. A moving head is a fixture whose pan and tilt are driven over DMX. Give a moving head live manual steering and it does the follow spot's job, without the platform or the dedicated operator.
Q: Do I need a lighting console to run a follow spot?
No. A console's joystick is one way to steer a fixture; a phone or a standard game controller does the same job. What matters is that the control sets speed rather than position, so you can nudge a beam onto a moving person instead of aiming at a coordinate.
Q: Why does my moving head go the wrong way when I push left?
It is almost certainly hung upside down. Flipping the fixture inverts both pan and tilt relative to your controls. Mark it as hung in your software, per fixture, and the controls line up again.
Q: Can a volunteer learn to run a follow spot from a phone?
Usually in a couple of minutes. Push in the direction you want the light to go, let go to stop. Starting them on a slower speed setting makes the first attempt forgiving, and a game controller is often quicker still because most people already know how to hold one.