WATCHMAKER R3 is a precision automatic rotary welding machine for small parts, lightweight machine components, and measuring or laboratory equipment. Designed for TIG AC/DC and PLASMA AC/DC welding, it has a maximum turning diameter of 340 mm and a maximum static load of 25 kg, with 800 mm between spindle flanges. Digital control system R3 provides simple automation of circumferential welding.
Machine design and manufacturing decisions are reviewed against the intended industrial application.
Mechanical movement, controls and operator access are considered together in the machine concept.
The welding method and workpiece requirements inform the available equipment and configuration.
HST can review the workpiece, process and production sequence before confirming a machine scope.
Product description
WATCHMAKER R3 is a precision automatic rotary welding machine for small parts with a maximum turning diameter of 340 mm, a maximum static load of 25 kg, and 800 mm between the spindle flanges. EWR WATCHMAKER machines are suitable for PLASMA AC/DC and TIG AC/DC welding, but not for MIG/MAG welding.
The machine is designed for precision manufacturing of lightweight machine components, measuring and laboratory equipment, and other small, precise parts. Its precision and well-engineered design deliver welding results comparable to those of conventional single-purpose machines. Precision construction and factory alignment with a maximum deviation of 0.2 mm measured at the spindle flange edges support welding of small, precise parts. This tolerance applies to the machine's factory alignment at this measurement point. The spindle through-holes also allow welding of tubular and rod material or weld-root protection with inert gas.
The tailstock can be equipped with its own drive synchronized with the main spindle; both spindle drives are backlash-free. The stepper motor drives a precision planetary gearbox, which transmits motion through a belt and gear wheels with transverse teeth. The main spindle and tailstock have identical standardized flanges, each 125 mm in diameter with a 28 mm through-hole.
Tailstock pressing uses linear motion through a drawbar, with precise mechanical adjustment of the pressure force using a nut and control lever. Alternatively, the tailstock can be equipped with automated pneumatic pressing using a pneumatic cylinder with the required stroke.
The entire central beam can be tilted from 0 - 90°. Tilting is adjusted manually by a handle through a worm gearbox, allowing precise positioning to optimize the welding process.
The welding arm has a simple pneumatic stroke and three adjustment joints. At the end of the arm, a backlash-free torch support provides +/- 15 mm two-axis adjustment and 90° rotation with position locking in five steps. TIG and PLASMA WELD torch holders are available.
The machine can also be equipped with a separate controlled output for switching an external device. This output can be used to connect and switch the HST CREATIVE cold wire feeder of the FEDEER Connect type, designed for external equipment without integrated wire-feeder control. The feeder has separate, independent controls for adjusting cold wire feeding parameters and reverse wire feeding.
The machine uses the same digital control system R3 as HST CREATIVE rotary welding positioners. Specially designed for circumferential welding, this system provides simple yet effective automation of the process. The machine also has a separate controlled output for switching the welding source arc ON.
The R3 control system is designed for straightforward operation. For welding programs requiring precise adjustment of rotary acceleration and deceleration, integrated control of the cold wire feeder, or other advanced functions, WATCHMAKER R6 is the more suitable choice.
HST service continuity
Selected HST machines can be supplied with extended service support in addition to the statutory warranty. The exact scope is always confirmed in the offer or contract.
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