Description
Renishaw RMP400
Technical Specifications Brand: Renishaw Model: RMP400 Transmission: 2.4 GHz FHSS radio communication Stylus Overtravel: ±360° in X and Y axis, ±15° Z axis Trigger Repeatability: 0.25 μm unidirectional Operating Temperature: 5°C to +55°C Protection Grade: IP68 Battery: Replaceable lithium battery inside probe body Maximum Machine Spindle Speed: 20000 rpm Trigger Force: Adjustable low trigger force for delicate workpieces
Functional Features Full 360° radio signal coverage without line-of-sight restriction compared with optical probes. High repeatability trigger mechanism ensures precise coordinate capture. Integrated battery status monitoring, low battery warning signal sent to machine controller. Filter circuit suppresses false trigger caused by machine vibration and coolant splash. IP68 sealed construction resists coolant, chip dust and cutting fluid immersion. Compatible with Renishaw radio receivers and CNC macro cycles for automatic measurement program. Multiple probes can work on same machine without signal interference.
Application Scenarios CNC machining center workpiece alignment, in-process dimensional inspection, tool break detection, mold machining on-machine measurement, aerospace part setup, precision fixture alignment.
Performance Parameters Unidirectional repeatability reaches 0.25 μm. Radio communication anti-interference capability works reliably in metal machine enclosure. Low trigger force reduces risk of workpiece surface scratch and stylus damage. Sealed structure prevents coolant ingress during heavy cutting cycles. Battery life supports thousands of working hours under normal workshop use.
Material Composition Probe housing: high strength aerospace grade aluminum alloy with hard anodized anti-corrosion coating. Internal trigger mechanism: precision sapphire bearing and spring contact assembly. Stylus: tungsten carbide shaft with ruby ball tip. Internal circuit board: mini FR4 PCB with conformal coating. Battery compartment: sealed plastic assembly with waterproof O-ring.
Structural Features Compact cylindrical body designed for spindle taper mounting. Internal sealed chamber isolates electronic circuit from machine coolant and metal chips. Spring loaded kinematic trigger mechanism provides uniform trigger performance in all directions. O-ring seals at battery cover and stylus mounting port. Radio antenna embedded inside probe housing.
Working Principle The probe is clamped on CNC machine spindle. When ruby stylus touches workpiece surface, internal kinematic mechanism triggers switch signal. The on-board circuit converts trigger event into radio packet and sends to receiver unit mounted on machine cabinet. Receiver transfers trigger signal to CNC controller, machine axis position is captured instantly. Machine macro program calculates workpiece coordinate offset, compensates workpiece misalignment and executes dimension inspection routine.
Installation Requirements Install probe into machine spindle taper and tighten drawbar with specified torque. Mount radio receiver at proper position to guarantee stable radio signal. Connect receiver to CNC controller I/O terminals and load Renishaw macro programs. Set probe trigger force and perform probe calibration with standard calibration sphere. Check battery contact and seal O-ring during battery replacement.
Usage Notes Avoid heavy collision between stylus and workpiece or fixture, impact damages internal kinematic mechanism. Keep ruby tip clean, metal chip adhesion reduces measurement accuracy. Do not leave probe immersed in cutting fluid for extended period. Replace O-ring when changing battery to maintain IP68 sealing performance. Run calibration routine periodically to compensate stylus wear.
