DF Desktop Soldering Robot DF204S / DF304S / DF404S

DF Desktop Soldering Robot — DF204S / DF304S / DF404S

Automatic soldering robot for precision electronics assembly · Supplied by an authorized JAPAN UNIX distributor

The DF desktop soldering robot is an automatic soldering system built for precision electronics assembly. It is offered in three sizes — DF204S (compact), DF304S (mid-size) and DF404S (wide) — covering everything from small benchtop fixtures to large printed-circuit boards. All models support Industrial 4.0 networked data management, multi-axis synchronized soldering and CCD vision correction, and can be paired with a laser soldering system.

DF204S compact desktop soldering robot
DF304S mid-size desktop soldering robot
DF404S wide desktop soldering robot

1. Model overview

Model	Type	Worktable	X/Y speed	Z speed	Controller
DF204S	Compact	200 × 210 mm	600 mm/s	250 mm/s	Standalone soldering controller
DF304S	Mid-size	300 × 275 mm	900 mm/s	400 mm/s	Built-in controller
DF404S	Wide	400 × 365 mm	900 mm/s	400 mm/s	Built-in controller

The DF204S is a space-saving compact unit, easy to operate with high soldering reliability. The DF304S covers the widest range of applications. The DF404S offers a long stroke and high payload, suited to large boards and M-shaped substrates.

Selection guide: choose DF204S / DF304S / DF404S by board size and cycle time

The three models share the same DF platform; the core differences are worktable size, speed and controller layout. Lock in the model in three steps:

Step 1 — Board / workpiece size (decisive factor)
≤ 200 × 210 mm (small boards, prototyping, tight benches) → DF204S (compact)
300 × 275 mm mainstream multi-type boards → DF304S (mid-size, widest coverage, the default starting point for most lines)
≥ 400 × 365 mm (large boards, multi-panel arrays, long connectors) → DF404S (wide)
Step 2 — Line cycle time (speed)
Need 900 mm/s X/Y high-speed throughput → DF304S / DF404S
Non-extreme cycle, mostly compact benches → DF204S at 600 mm/s is sufficient
Step 3 — Controller and footprint
DF204S uses a standalone soldering controller: small footprint, flexible maintenance
DF304S / DF404S use a built-in controller: space-saving, high integration

Default recommendation: most lines start with the DF304S; use the DF204S for small benches or prototyping; use the DF404S for large-board / high-payload lines. If your exact board size or cycle time is uncertain, send us the workpiece parameters and we will help confirm the model and solution.

2. Industrial 4.0 networking and data management

Connects to the factory network / MES for process visualization and production-status monitoring (optional).
Dedicated PC monitoring software shows real-time operating status, live temperature curves, and run / error logs to raise first-pass yield.
Standard LAN / USB ports for data export and backup; Ethernet / COM ports for external-device communication.
All soldering process data can be exported to CSV for yield analysis and process improvement.
In networked mode, the robot auto-sends error-alarm e-mails to a designated address for immediate response.
Optional advanced welding-management software “Soldering Manager” (paid).

3. 3D universal soldering and auxiliary axes

The standard unit has 4 axes; up to 2 auxiliary axes can be added for a maximum of 6 simultaneously controlled axes, enabling multi-angle soldering within a single program. Auxiliary axes can rotate the workpiece, flip the board, tilt angles, turn cylindrical parts and hold wire harnesses — solving complex shapes that conventional robots struggle with. Up to 2 stepper / servo motors can be taught on the teach pendant to coordinate rotary tables, conveyors and other external devices.

4. New heater performance

A higher-precision heater improves temperature stability; the sensing point sits close to the tip for more accurate control.
Faster temperature recovery than previous models, raising production efficiency.
Heater and tip are separated and can be replaced independently.
An anti-misalignment locator prevents wrong tip orientation during installation.

5. Vision system and position correction

For fine production, the camera function is enhanced: on top of the existing position-correction function, auto-calibration and computed CCD correction are added, widening the vision system’s use cases. Computed camera correction lets the robot import up to 3,000 correction values; for tray-arranged parts it can “shoot continuously → work continuously” instead of the repeated “shoot → work → shoot again” loop, significantly shortening cycle time.

6. Rigidity and processing-speed improvement

Upgraded motors raise the maximum payload from 11 kg to 15 kg (DF304S / DF404S only); DF304S / DF404S reach up to 900 mm/s with a 7 kg tool. The rigidity mechanism of earlier models (DF204S) is improved, raising maximum speed and acceleration, shortening cycle time. Trajectory performance is more stable at high speed for long-term reliable operation.

7. Hidden-defect management: temperature & leak detection

An optional temperature / leakage detection module measures tip leakage voltage and ground resistance while measuring tip temperature — important for process control. Unstable tip temperature affects joint finish; leakage and transient voltage can damage components internally; from an equipment-protection standpoint, measuring and ensuring tip-to-ground resistance is necessary. Complies with IEC-61191-1 (Ed3 / 2018) and IPC J-STD-001G; performs multiple measurements and automatic tip-temperature compensation.

8. Operation interface and teaching programming

A new wire feeder simplifies changing wire diameter: swap the feed block, no adjustment needed. Includes a flux-splash-preventing broken-wire feeder, switchable between standard feed and CLEAN-CUT. Point-chart editing builds points / lines / circles / arcs from imported JPEG / DXF / Gerber data on a PC. Direction-specified sorting shortens cycle time for multi-path jobs. R-corner auto-arc function eases editing. Up to 999 programs with per-program tip shape and temperature; optional 3-axis position correction per program.

9. Equipment system software

Common settings across all programs (“work origin”, “soft limits”, “PTP drive conditions”) set once, saving teaching time.
Error log shows date / time of errors; keeps the last 1,000 errors.
Simple built-in PLC (up to 100), no extra purchase needed for basic external-device communication.

10. Dedicated PC programming software (optional)

A conversational program-input system to create, edit and save teach data and custom data on a computer: numeric point setting, spreadsheet-style copy / paste of coordinate data, and graphical point-chart editing of path data.

11. Multilingual teaching and fieldbus

The teach pendant supports 11 languages: Simplified / Traditional Chinese, Japanese, English, French, Spanish, Italian, German, Korean, Czech and Vietnamese. Fieldbus modules are selectable from DeviceNet / PROFIBUS / CC-Link / EtherNet/IP / PROFINET / CANopen for easy integration with automatic lines.

12. Standard configuration and technical specifications

Specification	UNIX-DF204S	UNIX-DF304S	UNIX-DF404S
Axes	4 standard + 2 optional auxiliary (max 6 controlled)
Travel X / Y / Z	200 / 250 / 50 mm	300 / 320 / 100 mm	400 / 400 / 100 mm
R axis	±360°
Max workpiece weight	7 kg	15 kg	15 kg
Max speed (PTP) X,Y / Z / R	600 / 250 / 600°/s	900 / 400 / 900°/s	900 / 400 / 900°/s
Repeatability X,Y / Z / R	±0.01 mm / ±0.01 mm / ±0.008°
Max workpiece (fixture) size	200 × 210 mm	300 × 275 mm	400 × 365 mm
Programs / points	999 programs / 32,000 points max
Tip temperature range	200 – 450 °C
Heater power	250 W (cross heater LS / L)
Wire diameter	Φ0.3–1.2 mm (std), Φ0.6–1.0 mm (clean cut)
Dimensions (W×D×H)	413×387×706 mm	560×575×934 mm	584×635×934 mm
Power	AC100–120V or AC220–240V 50/60Hz 550W(VA)
Weight	~35 kg	~45 kg	~52 kg

13. Application cases

Widely used in: automotive electronics, smartphones & 3C modules, temperature sensors, medical pressure sensors (ceramic-substrate wire bonding), PCB terminals, microphone connectors, camera modules and Hall sensors.

Frequently asked questions

What is the difference between DF204S, DF304S and DF404S?

They differ by worktable size and payload: DF204S is compact (200×210 mm table, ~7 kg max load, standalone controller); DF304S is mid-size (300×275 mm, 15 kg, built-in controller); DF404S is wide (400×365 mm, 15 kg, built-in controller), suited to large boards and M-shaped substrates.

How many axes does the DF desktop soldering robot support?

Standard 4 axes, with up to 2 optional auxiliary axes for a maximum of 6 simultaneously controlled axes — enabling multi-angle soldering in one program. Auxiliary axes can rotate the workpiece or flip the board.

What Industrial 4.0 and data-management functions are supported?

It connects to the factory network / MES (optional), has standard LAN / USB for data export, exports all soldering data to CSV for yield analysis, auto-sends error-alarm e-mails when networked, and offers the optional “Soldering Manager” software.

What is the tip temperature range and wire diameter?

Tip temperature range is 200–450 °C; wire diameter Φ0.3–1.2 mm (standard) or Φ0.6–1.0 mm (clean cut).

Which industries and parts is the DF series used for?

Widely used in automotive electronics, smartphones & 3C modules, temperature sensors, medical pressure sensors (ceramic-substrate wire bonding), PCB terminals, microphone connectors, camera modules and Hall sensors.

What are the heater features?

A higher-precision heater with the sensing point near the tip gives more accurate control and faster temperature recovery; the heater and tip are separated for independent replacement, and an anti-misalignment locator prevents wrong tip orientation.