As manufacturing environments continue to pursue higher precision and smarter automation, desktop robots are becoming a standard solution for compact, high-accuracy applications such as dispensing, screw fastening, soldering, and PCB routing.

Despite their relatively simple structure, selecting the right desktop robot is not always straightforward. Questions such as “Which model should I choose?” and “What payload capacity is sufficient?” often arise during project planning.

This article outlines five critical technical criteria to help you select the most suitable JANOME desktop robot for your application.

Note: The explanations below are based on the JR3000 Series. Certain model configurations and naming conventions may differ in the JR4000 Series. Always verify the specifications of the selected series before finalizing your decision.

What Is a Desktop Robot?

A desktop robot is a Cartesian robot system that operates through linear motion along the X, Y, and Z axes. Some models also include an R axis for tool rotation.

Typical Configuration

• 3-axis: X, Y, Z or 4-axis: X, Y, Z + R (±360° rotation)
• Stepping motor drive system
• X-table work platform
• High-precision path control

2 Janome standard desktop robot: JR4000 series and JR3000 series

The robot moves the tool head along orthogonal coordinates while the workpiece remains fixed on the table.

Because of this structure, desktop robots are best suited for small to medium-sized components. They are not designed for handling large workpieces or picking parts from moving conveyor systems. However, within their intended scope, desktop robots offer significant advantages:

• High positioning accuracy
• Excellent repeatability
• Rigid and stable mechanical structure
• Compact footprint
• Easy programming, deployment, and maintenance

JANOME Desktop Robot Model Codes

JANOME model codes are structured to reflect five key parameters that directly impact selection.

By understanding how to interpret each element in the model code, you can quickly identify the configuration that aligns with your process requirements.

Model JR3000 series

Example
(1) Device Type	(2) X-Y Axes Stroke(mm)	(3) Number of Axes	(4) Encoder - Product Type	(5) Operation Panel Specifications	(6) Power Supply Specifications
JR3000 Series	20: 200 x 200 30: 300 x 320 40: 400 x 400 50: 510 x 510 60: 510 x 620	2: 2 Axes 3: 3 Axes 4: 4 Axes	E: Encoder Included N: Without Encoder F: Heavy Duty Robot	A: Installed Switch Spec B: Switchbox Spec C: Basic Switchbox Spec	C: mainly the EEA and Korea J: mainly Japan

Model JR4000 series

Example
(1) Device Type	(2) X-Y Axes Stroke(mm)	(3) Number of Axes	(4) Encoder - Product Type	(5) Operation Panel Specifications	(6) Power Supply Specifications	(7) CE Declaration
JR4000 Series	20: 200 x 200 30: 300 x 320 40: 400 x 400 50: 510 x 510 60: 510 x 620	3: 3 Axes 4: 4 Axes	E: Encoder Included N: Without Encoder	A: Installed Switch Spec B: Switchbox Spec C: Custom Switch Spec	0: 100-120/200-240V 50/60Hz (No outlet) 1: 100-120V 50/60Hz (100V outlet)*2 2: 200-240V 50/60Hz (200V outlet)*2	A: Not Declared (for sale in Japan only) B: Declared (Power Supply Specifications: 0 only)

*1 Motor Synchronization Error Detection Function
*2 The JR4200 CE Declared, with I/O-S2 added type has no outlet.

1. Size - Operating Range and Payload Capacity

JANOME’s desktop robots are available in five different sizes (see table below).

*1: For a 4-axis robot.
*2: The JR3000 series with a Heavy-Duty specification can handle workpieces up to 20 kg

When determining the appropriate size, consider:

• Required operating stroke
• Tool weight, such as dispensing valves, screwdrivers, or PCB routers
• Workpiece and fixture weight

Selecting the correct size ensures stable motion control, proper acceleration performance, and long-term reliability.

Technical Considerations:

• Payload directly affects stability and acceleration
• Overloading may cause step-out in stepping motors
• Excessive stroke length can increase cycle time

2. Number of Axes (XYZ + R Axis)

JANOME offers both 3-axis and 4-axis models.

• 3-axis models provide linear motion along X, Y, and Z
• 4-axis models add an R axis for rotational movement

If your application requires tool rotation or angular adjustment during processing, a 4-axis model is necessary.

If rotational movement is not required, a 3-axis configuration is sufficient and can reduce overall system cost.

3. Encoder and Product Type

JANOME offer the following specifications tailored to different applications:

About the Encoder-Included Specification

Desktop robots typically use stepping motors. Under excessive load or improper parameter settings, step-out may occur, leading to position deviation.

Encoder-equipped models offer enhanced protection by:

• Detecting step-out conditions
• Automatically stopping the system when an error occurs
• Preventing positional inaccuracies
• Supporting stable product quality

For applications requiring strict precision control and quality assurance, selecting a model with encoder feedback is highly recommended.

4. Control Interface Options (Start Switch and Program Select Placement)

You can choose from three configuration options based on where the program number is displayed and switched, as well as where the start operation is performed.

• A: Installed Switch Specification
• B: Switchbox Specification
• Cấu hình C: Basic Switchbox Specification

The optimal choice depends on your production line layout, operator accessibility, and standard operating procedures.

5. Power Supply Specification (Outlet Options)

This selection refers to whether the robot includes a power outlet, and if so, what voltage it supports.

• C: No outlet included
• No symbol: Outlet included (supports 200V)
• Y: Outlet included (supports 100V)

Ensure compatibility with your factory’s electrical system before ordering.

Selecting the Right Desktop Robot for Your Application?

There is no one-size-fits-all configuration. The optimal desktop robot depends on:

• Application requirements
• Tool and workpiece characteristics
• Required precision level
• Production line layout and operating environment

For detailed specifications of JANOME desktop robot series, refer to the official catalog here.

Temas, as the official Janome distributor in Vietnam, provides technical consulting, model selection support, system integration guidance, and maintenance services to help manufacturers implement reliable desktop robot solutions.

Contact us to discuss the most suitable configuration for your production needs.