Maybe a printed snap-on cover with some clear plexi cut to shape to fit in the holder.
If it fits tightly where it can’t just be lifted away, it could prevent fingers from actuating front panel controls but still let people see the display.
There are so many X1 screen cover models on MakerWorld too.
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The closest solution I know of is the Screen Lock available with X1Plus. You can set a numerical unlock code, but it does disable the display completely.
On a slightly related note, the H2D has a “safety key” on the rear that can be removed to disable the printer.
Can we PLS get a pin lock like on a phone to keep annoying siblings or the curious friend that touches things when ur not looking, on the A1 I hate coming home and finding that my brother decided to print something because “ I thought it would look cool” and in my house we aren’t allowed to lock our doors.
I understand the “everything can be solved with 3D printing” mindset,
but my fridge, washing machine, cooktop, phones, tablets, basically every capacitive touch interface have a lock feature. It’s far more common to have it than to not have it.
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+1 add child lock please. Should be very easy change.
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Bumping this thread — 3 years later, still very relevant.
I own two Bambu printers: a P1S and the brand-new X2D. And here’s what blows my mind: not even the X2D — a current-generation, premium machine — ships with a child lock. This is a basic, table-stakes feature that should have been there from day one. Every modern oven, washing machine, induction cooktop and smart TV has had this for over a decade. A 3D printer running a 12-hour job at 220 °C is arguably more safety-critical than any of those.
Real-world anecdote that pushed me to comment: my 4-year-old son walked up to the printer mid-print and went straight for the big red Stop button on the touchscreen. I caught his hand about half a second before he tapped it — would have killed a 12-hour print.
And honestly, I can’t blame him. From a toddler’s perspective that screen is irresistible: bright, glowing, touch-responsive, and the most prominent button on it is a giant red circle. It’s basically designed to attract exactly the kind of attention you don’t want.
What I’d love to see (firmware-only, no hardware change needed):
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Optional child lock in Settings, off by default
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Slide-to-unlock or 4-digit PIN to access destructive actions: Stop, Pause, Filament change, Resume, Home axes
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Non-destructive actions (view status, camera, progress) remain freely accessible
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Auto-lock after N seconds of inactivity (configurable)
This is genuinely basic UX hygiene. Implementation cost looks minimal (pure UI/firmware), user impact is high, and it would be a great selling point for parents, schools, makerspaces, and shared-workshop environments — all markets Bambu is clearly targeting.
The fact that a 2026 machine still ships without this is, frankly, a miss. Please consider prioritizing it for the next firmware cycle. 
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How tall is your 4 year old? The only way I see this being possible is if your printer is on the floor?
Ahah fair question 
Honestly the height doesn’t really matter — anyone who’s had a 4-year-old knows that chairs, stools, cushions, and any climbable object in a 5-meter radius become tools the moment a glowing colorful screen is involved. They’re remarkably resourceful.
And here’s the thing that makes 3D printers a special case: kids quickly figure out that the printer is the magic box that makes their toys. Once they make that connection, they’re not passively curious anymore — they’re actively motivated to get close whenever it’s running. A print in progress is, from their perspective, a surprise being prepared for them, and they want to peek. The pull toward the screen isn’t accidental, it’s purposeful. That’s a pretty different threat model from “what if a toddler bumps into it”.
But the height of one specific child isn’t really the point. The broader issue is that the touchscreen UI has zero protection against unauthorized input — whether the source is a determined kid with a stool, a guest at a workshop, a student in a school lab, or someone leaning on it by accident. A screen lock is a generic safety/access-control feature that every other smart appliance has had for over a decade. The toddler anecdote is just the most relatable example.
Perhaps Bambu will add this but in the interim there are plenty of screen covers on Makerworld that you could print that would accomplish the same task. Also I feel that the door would need a locking device as the hotend and machine mechanics would pose more danger than the screen. This brings up another point, how do you safeguard the A series printers? Screen locks don’t really safeguard a 3d printer.
Fair points to think through, let me share my take on each:
1. “Just print a screen cover from Makerworld.” That one honestly made me smile — knowing my 4-year-old, a printed cover would last about ten seconds before being treated as “another cool thing daddy made for me” and removed Beyond the toddler scenario, accessories also tend to get lost or removed in shared environments like schools and makerspaces. A built-in software lock is just a cleaner solution: no extra parts, no friction for the legitimate user, works everywhere.
2. “The door is more dangerous than the screen.” Totally agreed — the hotend and mechanics are physically more dangerous, and a door interlock would be a great addition too. I’d love to see Bambu ship both. They actually solve different problems and complement each other nicely:
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Door lock → protects the user from reaching into a hot/moving machine
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Screen lock → protects the machine from being commanded to do something unintended
A child starting an unauthorized 12-hour print, or stopping a 12-hour print one tap before completion, isn’t a physical safety issue but it’s still a real, common problem worth solving. Both layers are useful; neither replaces the other.
3. “How do you safeguard the A series?” Same way — the A1 and A1 mini have full color touchscreens, so the same screen-lock proposal covers them too. And honestly, the A1 is probably the model where this matters most: it’s the most accessible, lowest-priced printer in the lineup, the one most likely to end up on a desk in a family home within reach of kids and pets. I really hope nobody buys one and leaves it accessible to a child without some form of protection.
You’re right that a screen lock alone doesn’t make a 3D printer fully safe — nobody’s claiming that. It’s one layer addressing one specific gap. The fact that other layers (door interlock, etc.) would also be valuable is an argument for adding more of them, not for skipping this one.
I think you missed the point I was making. These are open frame printers. They would need full “safety” enclosures/cabinets to make them intrinsically safe which would negate a need for a screen lock.
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