OS3T-01 is an ohmic sensor that lets your CNC plasma cutter find the plate surface accurately before every pierce. It detects the electrical contact between the torch shield and the metal plate, so the machine knows the exact initial height without pressing on the material – faster and more precise than mechanical touch-off on thin or flexible sheet. Built for the harsh plasma environment, it withstands high-frequency and high-voltage starting sparks up to 660 VDC, and its isolated PNP output connects safely to the CNC controller. Sensitivity is adjustable to suit dirty, coated or oily plates. Designed and built by Robot3T in Vietnam.

Typical applications

• Initial height sensing (IHS): accurate pierce height on every cut for CNC plasma tables.
• Thin and flexible sheet: touch-off without bending the plate.
• Torch height control systems: works together with THC3T-02 controllers.
• Machine builders and retrofits: adding ohmic sensing to new or existing plasma machines.

Why OS3T-01

• Built for plasma – survives HF and HV starting sparks, arc voltage input up to 660 VDC.
• Accurate and fast – electrical contact sensing finds the plate surface without mechanical force.
• Safe connection – isolated PNP output protects the CNC controller.
• Adjustable sensitivity – reliable on clean, rusty, coated or oily plates.
• Long life – output relay rated for at least 10⁸ operations at 24 V / 16 mA.
• Robust power input – 12–24 VDC with built-in reverse-voltage protection.

Specifications

Product and wiring

Documentation

See it in action

Frequently asked questions

Do I need an ohmic sensor if I have a THC?
Yes, they do different jobs. The ohmic sensor sets the correct initial height before piercing; the THC keeps the height constant while cutting. Together they give the best cut quality.

Does it work with any CNC controller?
Its isolated PNP output connects to the probe or input of most CNC controllers and software such as Mach3. Tell us your system and we will confirm the wiring.

What if my torch has no ohmic shield connection?
Contact us with your torch model; we will advise on wiring or an alternative such as a mechanical float switch.

Do you ship outside Vietnam?
Yes. Contact sales@robot3t.com for a quote including shipping to your country.

The post OS3T-01 Ohmic Sensor for CNC Plasma Cutting appeared first on Robot 3T.

CTH3T-02 bảo vệ mỏ cắt plasma đường kính thân 45–55 mm khi đầu cắt va vào chi tiết bị vênh, đồ gá hoặc mặt bàn ở tốc độ cao. Cơ cấu lò xo thụ động phản ứng tức thì – không cần điện hay phần mềm – cho mỏ cắt bật ra thay vì bị cong, gãy; đồng thời hai cảm biến va chạm báo cho bộ điều khiển CNC dừng máy. Thêm một lỗ lắp cảm biến để dò bề mặt phôi. Cụm gá nhỏ gọn, chỉnh được góc nghiêng mỏ và độ cứng lò xo, lắp dễ dàng lên trục Z của mọi máy cắt plasma CNC. Robot3T thiết kế và sản xuất tại Việt Nam.

Ứng dụng tiêu biểu

• Máy cắt plasma CNC: bảo vệ mỏ cắt trên máy cắt kiểu cổng trục và máy cắt di động.
• Tôn dày, tôn cong vênh: nơi chi tiết sau cắt hay bị bật lên chắn đường mỏ.
• Nhà chế tạo máy, nâng cấp máy cũ: thêm chức năng chống va chạm cho máy mới hoặc máy đang dùng.
• Robot cắt plasma: bảo vệ mỏ cắt gắn trên cánh tay robot.

Vì sao chọn CTH3T-02

• Bảo vệ tức thì – lò xo thụ động phản ứng cơ khí, nhanh hơn mọi phần mềm.
• Dừng máy kịp thời – hai lỗ cảm biến va chạm gửi tín hiệu về bộ điều khiển khi có va đập.
• Sẵn sàng dò bề mặt – lỗ cảm biến thứ ba dùng để dò độ cao ban đầu.
• Tinh chỉnh được – chỉnh góc nghiêng mỏ và độ cứng lò xo theo mỏ cắt và quy trình.
• Nhỏ gọn, dễ lắp – thiết kế tích hợp cao, lắp trực tiếp lên trục Z.
• Giảm chi phí vận hành – ít hỏng mỏ, ít tốn vật tư tiêu hao và thời gian dừng máy.

Thông số kỹ thuật

Kích thước

Hình ảnh sản phẩm

Câu hỏi thường gặp

Lắp được với mỏ cắt plasma nào?
Mỏ cắt có đường kính thân 45–55 mm. Với cỡ khác, bạn gửi model mỏ cắt, chúng tôi tư vấn cụm gá hoặc đầu chuyển phù hợp.

Cần dùng cảm biến gì?
Dùng cảm biến tiệm cận dạng ren tiêu chuẩn cho phát hiện va chạm và dò bề mặt. Robot3T có thể cung cấp cảm biến và hỗ trợ đấu nối vào bộ điều khiển CNC.

Dùng chung với bộ điều khiển CNC của Robot3T được không?
Được. Cụm gá kết hợp tốt với các thiết bị điều khiển máy cắt CNC của chúng tôi, và cũng nối được với hầu hết bộ điều khiển hãng khác qua ngõ vào tín hiệu.

Có hỗ trợ lắp đặt không?
Có. Kỹ sư Robot3T hướng dẫn lắp đặt, căn chỉnh và đấu nối; hỗ trợ kỹ thuật có mặt trong 48 giờ.

The post CTH3T-02: 45 to 55mm Diameter Anti-collision Torch Holder appeared first on Robot 3T.

CTH3T-01 is the improved version for plasma torches with a 30–36 mm body. It protects the torch when the cutting head hits a tipped-up part, a fixture or the table at high speed. Its passive spring mechanism reacts instantly – no power or software needed – letting the torch break away instead of bending or breaking, while two collision sensors tell the CNC controller to stop the machine. A third sensor port is provided for surface detection. The holder is compact, lets you adjust torch tilt and breakaway stiffness, and mounts easily on the Z axis of any CNC plasma cutting machine. Designed and built by Robot3T in Vietnam.

Typical applications

• CNC plasma cutting tables: protect the torch on gantry and portable cutting machines.
• Thick and warped sheet: where cut parts often tip up into the torch path.
• Machine builders and retrofits: add crash protection to new machines or upgrade existing ones.
• Robotic plasma cutting: breakaway protection for torches mounted on robot arms.

Why CTH3T-01

• Instant protection – the passive spring reacts mechanically, faster than any software.
• Stops the machine – two collision sensor ports send a signal to the controller on impact.
• Surface detection ready – a third sensor port for initial height sensing.
• Tunable – adjust torch tilt and breakaway stiffness to match your torch and process.
• Compact and easy to fit – highly integrated design that mounts directly on the Z axis.
• Lower running cost – fewer broken torches, consumables and hours of downtime.

Specifications

Dimensions

Product images

Documentation

Frequently asked questions

Which plasma torches does it fit?
Torches with a 30–36 mm body. For Ø45–55 mm torches use CTH3T-02; for other sizes, send us your torch model and we will recommend the right holder.

What sensors do I need?
Standard threaded proximity sensors are used for collision and surface detection. We can supply the sensors and help wire them to your CNC controller.

Does it work with Robot3T CNC controllers?
Yes. It pairs with our CNC cutting control products, and can also be connected to most third-party controllers through their input signals.

Do you ship outside Vietnam?
Yes. Contact sales@robot3t.com for a quote including shipping to your country.

The post CTH3T-01: 30 to 36mm Diameter Anti-collision Torch Holder appeared first on Robot 3T.

THC3T-02 is a compact torch height controller for CNC plasma cutting, with a built-in 1:50 voltage divider so it works with plasma cutters that have no divided arc voltage output. It reads the arc voltage while the torch is cutting and automatically raises or lowers the torch to keep a constant distance to the plate, so cut quality stays consistent even when the sheet is warped or the cutting bed is not perfectly flat. Signal-processing algorithms stabilize the voltage reading, and a smooth-motion algorithm prevents jerky Z movement. Connection is as simple as it gets: just three outputs – UP, DOWN and ARC OK – wired to your CNC controller, which then moves the Z axis. It detects ARC OK automatically, self-calibrates to the arc voltage of your plasma cutter, and integrates with Mach3 software. Designed and built by Robot3T in Vietnam.

Typical applications

• CNC plasma cutting tables: gantry and table machines running Mach3.
• Warped or uneven sheet: keeps torch height constant over bends and waves.
• Machine builders: a compact, cost-effective THC for new plasma machines.
• Retrofits: adding automatic height control to existing machines.

Why THC3T-02

• Better cut quality – constant torch height means consistent kerf, bevel and less dross.
• Longer consumable life – avoids torch dives and crashes caused by uneven plates.
• Simple wiring – only three outputs: UP, DOWN and ARC OK; ideal for retrofitting existing machines.
• No extra divider needed – integrated 1:50 divider takes the raw arc voltage directly.
• Stable reading – signal processing filters arc voltage noise; smooth-motion algorithm for gentle Z moves.
• Easy setup – automatic ARC OK detection and arc voltage calibration; adjust height on the fly with a potentiometer.
• Convenient – jog the Z axis from software in idle mode.

Specifications

Product, diagrams and setup

Block diagram

Connection diagram

Mach3 configuration

Up/Down or Step/Dir?

Both versions: arc voltage sensing, auto ARC OK, auto calibration, smooth motion, Mach3 integration.

Documentation

See it in action

Frequently asked questions

How is this different from the Hypertherm version?
This version has the 1:50 voltage divider and noise filter built in, so it reads the raw arc voltage directly from plasma cutters without a divided output. The Hypertherm version uses the divided signal provided by Hypertherm sources. Tell us your plasma model and we will recommend the right one.

Can I use it with software other than Mach3?
This Up/Down version is made for Mach3. For other CNC software or controllers, contact us and we will recommend a suitable THC version.

Up/Down or Step/Dir – which should I choose?
Choose Up/Down for the simplest wiring and easy retrofits. Choose the Step/Dir version when you want the THC to drive the Z motor directly for the fastest response.

Do you ship outside Vietnam?
Yes. Contact sales@robot3t.com for a quote including shipping to your country.

The post Torch Height Controller With Up/Down Output appeared first on Robot 3T.

THC3T-02 is a compact torch height controller for CNC plasma cutting, with a built-in 1:50 voltage divider so it works with plasma cutters that have no divided arc voltage output. It reads the arc voltage while the torch is cutting and automatically raises or lowers the torch to keep a constant distance to the plate, so cut quality stays consistent even when the sheet is warped or the cutting bed is not perfectly flat. Signal-processing algorithms stabilize the voltage reading, and a smooth-motion algorithm prevents jerky Z movement. Unlike controllers that only send up/down signals to the CNC, THC3T-02 drives the Z-axis motor driver directly with Step/Dir signals for faster response and higher accuracy. It detects ARC OK automatically, self-calibrates to the arc voltage of your plasma cutter, and integrates with Mach3 software. Designed and built by Robot3T in Vietnam.

Typical applications

• CNC plasma cutting tables: gantry and table machines running Mach3.
• Warped or uneven sheet: keeps torch height constant over bends and waves.
• Machine builders: a compact, cost-effective THC for new plasma machines.
• Retrofits: adding automatic height control to existing machines.

Why THC3T-02

• Better cut quality – constant torch height means consistent kerf, bevel and less dross.
• Longer consumable life – avoids torch dives and crashes caused by uneven plates.
• Fast, precise Z control – direct Step/Dir output to the Z driver, no extra loop through the CNC.
• No extra divider needed – integrated 1:50 divider takes the raw arc voltage directly.
• Stable reading – signal processing filters arc voltage noise; smooth-motion algorithm for gentle Z moves.
• Easy setup – automatic ARC OK detection and arc voltage calibration; adjust height on the fly with a potentiometer.
• Convenient – jog the Z axis from software in idle mode.

Specifications

Product, diagrams and setup

Block diagram

Connection diagram

Mach3 configuration

Up/Down or Step/Dir?

Both versions: arc voltage sensing, auto ARC OK, auto calibration, smooth motion, Mach3 integration.

Documentation

See it in action

Frequently asked questions

How is this different from the Hypertherm version?
This version has the 1:50 voltage divider and noise filter built in, so it reads the raw arc voltage directly from plasma cutters without a divided output. The Hypertherm version uses the divided signal provided by Hypertherm sources. Tell us your plasma model and we will recommend the right one.

Can I use it with software other than Mach3?
This Step/Dir version is made for Mach3. For other CNC software or controllers, contact us and we will recommend a suitable THC version.

What is the advantage of Step/Dir output?
The THC drives the Z motor directly instead of asking the CNC to move it, so corrections are faster and more precise.

Do you ship outside Vietnam?
Yes. Contact sales@robot3t.com for a quote including shipping to your country.

The post Torch Height Controller With Step/Dir Output appeared first on Robot 3T.