MP-1DSH Single-Disc Semi-Automatic Grinding and Polishing Machine

Overview

The MP-1DSH Single-Disc Semi-Automatic Grinding and Polishing Machine is an engineered solution for standardized, reproducible specimen preparation in metallurgical, geological, ceramic, and advanced materials laboratories. Designed around a robust coaxial drive architecture, it employs controlled mechanical abrasion via rotational shear between a rotating abrasive disc and sample surface under precisely regulated normal force. The machine operates on the principle of progressive material removal—first coarse grinding using silicon carbide or diamond-impregnated pads, followed by fine polishing with alumina or colloidal silica suspensions—to achieve flat, scratch-free cross-sections suitable for optical microscopy, electron backscatter diffraction (EBSD), and scanning electron microscopy (SEM) analysis. Its semi-automatic configuration balances operator control with process repeatability, making it ideal for routine QC labs and academic core facilities where throughput, consistency, and ease of method validation are critical.

Key Features

• Single 200 mm (8″) grinding/polishing disc with high-torque, brushless DC motor enabling stable speed maintenance across the full 50–1500 rpm range, even under variable load conditions.
• Infinitely variable speed control for both disc rotation and sample holder (head) rotation—disc: 50–1500 rpm; head: 20–120 rpm—supporting optimized relative velocity profiles for diverse material classes (e.g., soft aluminum alloys vs. hard tungsten carbide).
• Forward/reverse disc rotation selection to minimize directional artifact formation and improve edge retention during final polishing stages.
• Adjustable downward pressure mechanism with calibrated scale, allowing precise application of 10–50 N nominal load per sample—critical for minimizing relief and pull-out in multiphase composites.
• Reinforced plastic-steel composite housing ensures structural rigidity while providing electrical insulation, chemical splash resistance, and reduced acoustic emission during extended operation.
• Simultaneous processing of up to four standard 30 mm diameter specimens using a quadrant-mounted sample holder, maximizing lab efficiency without compromising individual sample alignment.

Sample Compatibility & Compliance

The MP-1DSH accommodates metallographic mounts (phenolic, epoxy, acrylic) ranging from 15 mm to 30 mm in diameter, as well as unmounted brittle samples secured via vacuum chuck or adhesive bonding. It supports common consumables including diamond-impregnated grinding discs (150–600 µm), silicon carbide papers (P80–P2500), and woven or non-woven polishing cloths (e.g., synthetic napped cloth for final 0.05 µm colloidal silica polishing). All operational parameters—including speed, direction, dwell time, and applied force—are manually set and documented per ASTM E3-22 “Standard Guide for Preparation of Metallographic Specimens” and ISO 16432:2015 “Metallic materials — Metallographic specimen preparation”. While not certified for GMP/GLP environments out-of-the-box, its mechanical repeatability and manual parameter traceability support audit-ready documentation when integrated into validated SOPs.

Software & Data Management

As a semi-automatic platform, the MP-1DSH does not include embedded microprocessor-based control software or digital data logging. All operational parameters are set via analog dials and mechanical switches, ensuring electromagnetic compatibility (EMC) in sensitive instrumentation suites and eliminating firmware-related failure modes. This design prioritizes long-term reliability, serviceability, and method transparency—operators directly observe and record settings (e.g., disc speed = 300 rpm, head speed = 60 rpm, pressure = 25 N, duration = 90 s) in laboratory notebooks or LIMS-integrated electronic logbooks. For labs requiring digital workflow integration, external timers and load-cell-based pressure monitors may be deployed in conjunction with this unit to meet internal QA requirements aligned with ISO/IEC 17025 clause 7.7 (Ensuring Validity of Results).

Applications

• Routine metallographic preparation of ferrous and non-ferrous alloys for grain size analysis per ASTM E112.
• Sectioning and polishing of geological thin sections (e.g., basalt, granite) prior to petrographic microscopy.
• Surface planarization of sintered ceramics (Al₂O₃, ZrO₂) and cemented carbides for hardness testing (ASTM E384) and fracture toughness evaluation.
• Preparation of cross-sections from printed circuit boards (PCBs) and electronic packaging substrates for solder joint integrity assessment.
• Specimen conditioning for subsequent ion milling or focused ion beam (FIB) lift-out in TEM sample preparation workflows.

FAQ

What is the maximum recommended sample diameter for use with the MP-1DSH?

Standard mounting allows specimens up to 30 mm in diameter; larger custom mounts may be fabricated but require verification of rotational balance and clamping security.
Can the MP-1DSH be used for electrolytic polishing?

No—this unit is strictly mechanical; electrolytic polishing requires separate power supplies, electrolyte circulation, and corrosion-resistant electrodes not supported by this platform.
Is the 200 mm disc compatible with standard industry consumables?

Yes—200 mm (8″) is a globally recognized disc size; all major suppliers (Buehler, Struers, ATM GmbH) offer compatible grinding papers, diamond discs, and polishing cloths.
Does the machine include water cooling or coolant delivery?

No built-in coolant system is provided; however, the base plate features threaded ports for optional third-party drip-feed or flood-cooling manifold integration.
What safety certifications does the MP-1DSH carry?

It complies with GB/T 3767–2016 (Chinese national standard for noise emission) and meets basic IEC 61000-6-2/6-4 EMC immunity/emission requirements for laboratory equipment; CE marking is not applicable as it is manufactured for domestic distribution only.