Rhythm SPX Selective Soldering Machine

RPS Rhythm SPX

Taking only minutes to program, the Rhythm SPX selective soldering machine handles basic to complex dip, drag, wire bond and other through-hole soldering processes previously performed by hand or wave soldering. 

Rhythm SPX Selective Soldering Machine

The SPX soldering system provides a large soldering range within it’s 24” by 24” frame. This process area does not require any rotation or adjustment in order to reach its capacity.

This soldering machine uses precise and reliable servo-driven XYZ axis motion control that articulates the soldering miniwave and flux nozzle beneath the PCB. A thermal performance a soldering miniwave is achieved with the use of a closed loop temperature controlled nitrogen inertion process. RPS offers innovative miniwave nozzle designs for wave stability and defect free performance.

Rhythm SPX Soldering System Features:

  • 24” x 24” Process Range
  • 1.5 mm Standard (Capable of 0.5mm) Keep Away
  • 6mm Lead Length Tolerance
  • +/- 0.05 mm Repeatability
  • +/- 0.25 mm Wave Stability
  • Off-line Programming Via RPS CamConductor™ Software
  • Low Maintenance: 80 Hour Pump Cleaning Cycle 
  • Low Consumables: Dross production of 1-2 ounces per shift 

Process Range

Solder Method


Lead Free

Performance Cycle


24 x 24”

600 x 600mm

Nozzle Motion

X-Y-Z Axes

Closed Loop Servo


80 Hours / Pump Clean

RPS Gaussian MiniWave™


Popular Soldering Machine Options

RPS offers a wide range of optional configurations to make sure each system that leaves the factory is suited to meet a customer’s specific manufacturing needs. Several popular options are listed below:


The effectiveness of an RPS soldering system is highlighted by its ability to handle a high mix of changing and often complex assembly requirements, including tall and odd size components, tight keep always, thermal demands and thermal limitation. The RPS Gaussian MiniWave™ delivers precise and smooth laminar solder for tight keep always and repeatability. RPS N2 DirectHeat™ for N2 inertion delivers closed loop N2 temperature control from 0-400C. This innovation enables superior thermal capacity at the point of soldering, reducing if not eliminating component risk associated with pre-heat. These and more innovations provide RPS customers with the ability to meet ever changing assembly requirements.


The Rhythm SPX does not rest on the success of the past. Several new features highlight this flexible performer:

17” LCD Witness System

New Tool Storage Racks

Ultrasonic Fluxer for RMA No Clean Flux Types

Internal LED Lighting System

Fully Integrated Fiducial Vision System


Superior Price-to-Performance Value

Selective soldering is proven to reduce hand and wave soldering operating costs by 30-90%. But payback also requires a system that offers easy programming, low cost operation, affordable off-the-shelf parts, and durable 10+ years of operation. The Rhythm SPX meets these requirements with ease. Moreover, with a 24 x 24” process range and unmatched thermal control and performance, the Rhythm SPX can process a wide range of applications, which means an unrivaled price-to-performance value.


Industry Standard Spare Parts

Low Cost N2 Consumption | 30 CFH

Low Cost Dross Production | 1.5 Ounces/Shift

High Precision Keep Away | 0.5mm Ready

Made in the USA Support & Pricing

Large Board Capacity | 24 x 24” Ready

Great Thermal Capacity | 200 - 400°C N2 Inertion

Rhythm SPX Selective Soldering System Specifications


Computer controlled XYZ robotic platform using closed loop servo motion control robotics. Flux and miniwave nozzles articulate below PCB. Programs generated via RPS CamConductor programming package. Program via GUI selection relative to imported JPEG and Gerber data images. Virtually unlimited program storage. PC, keyboard, mouse, monitor and monitor mount, installation, software & nozzles included. (Options denoted by *.)

Rhythm SPX Selective Soldering Operation

X/Y/Z Control Closed Loop Servo Motors

X/Y/Z Motion | Accuracy Lead Screw | ± .002"

Interpolated Motion Yes | Simultaneous X, Y and Z

Max Speed Ω X/Y axes @ 5” per second

Max Process Range24 x 24” | 605 x 605 mm

Min/Max PCB Size 1 x 1” to 24 x 24”

Load Method Manual | Universal PCB Holder

Inline SMEMA Load Option | SMEMA Edge Belt


Approach 360° | Access to All Solder Points

Nozzle Material Wetted Alloy

Nozzle Sizes (ID)1.5, 2, 2.5, 3, 4, 5, 8, 10, 20 mm & custom

Keep Away 1.5mm Standard | 0.5mm Capable

Max Wave Height 6mm Standing Wave Height

Component Max Height 3” | Top & Bottom of PCB

Flux PROCESS Control

Spray Fluxer | Stainless Steel Standard | 6.5 – 25mm | 40% Solids Max

Drop Jet Fluxer*0.5 - 2mm | 14% Solids Max

Ultrasonic Fluxer*1.5 - 15mm | Unlimited Flux Types

Dual Fluxers / Chemistry* Two Independent Nozzles & Plumbing

Flux Capacity 1 Liter Pressurized (per tank)

SOLDER Pot Management

Solder Pot Capacity 35 lbs | 16 kgs

Temp Control PID proportioning (0-400°C) ± 2°C

HMP Upgrade* Option

Heat Time 60 Minutes

Dross Production 1.5 Ounces per 8 Hours

Maintenance Cycle 80 Hour Pump Clean | 30 Minutes

Nitrogen Management

N2 Inertion RPS DirectHeat™

N2 Temp Control 0-400 °C Closed Loop | Adjustable Set Point

N2 Consumption | Purity 30-35 CFH | <20 PPM O2


  • Steel Welded Frame

  • Password Control

  • Lifetime Solder Pot Warranty

  • N2 Temp Control

  • Industry Standard Spare Parts

  • Drop Jet / Ultrasonic Flux Nozzles*

  • Custom Nozzles*

  • Dual Flux Nozzles*

  • High Def Witness Vision*


Safety UL and CE Compliant

Electrical 208-240 VAC | 1Ø 3 Wire | 50-60hz | 40 amp

Dimensions 64 x 63 x 49

(D x L x H) 64 x 70 x 49” (inline)

Air & N2 80 PSI | N2 <20 PPM O2 | 30 CFH N2

Exhaust 25 SCFH

Weight 900 lbs | 425 kgs

Freight 78 x 78 x 67” | 1100 lbs | 5o0 kgs


Check out This video to see how the SPX runs.
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