.S.P.M (India) Ltd,. Design, Manufacture and proveout various In Process Verification Machines such as piston height measuring, gasket selection machine, shim selection machine, preload adjusting machine, facerunout machine, centralizing machine, piston and con rod pair selection machine, piston stuffing and oiling machine, end play checking machine, continuity checking machine, computerized endurance test rig for window regulator etc.

Piston height measuring machine
Gasket selection machine
Shim selection machine
Preload adjusting machine
Face runout checking machine
Piston & Con rod pair selection machine
Piston stuffing and oiling machine
Valve height probing machine
End play checking machine
Continuity checking machine
Brake inertia Dynamometers
Computerized Endurance test rig for window regulator mechanism

The process is to subject the window to repeated cyclic motion by coupling the mechanism to DC motor and torque is measured. Torque v/s position graph can be seen on computer monitor. The rig consists of fixture to hold the door firmly. The D.C. motor is mounted over the triaxial co-ordinate table so that it can be moved to any fine position while coupling it with window regulator mechanism. Rotary encoder is fixed at the other end of the motor will give the feedback of position.

Micro switches are provided at extreme position to sense the position of window glass which sends to motor for reversal of its direction of rotation.

Audio visual alarm provided in the assembly gives signal when the torque exceeds by a reset amount. The entire rig is controlled, monitored and data acquired through a computer. A 12 bit add-on card does the interface cum data acquisition. A custom built software controls and monitors the entire rig.

The entire test rig can be put inside environmental chamber wherein the mechanism could be tested for environmental parameters like +82 to -30 C, R4+95. Also noise analysis can be done inside the chamber. SPMIL provides the entire test set up on turnkey basis.