The Challenge: A semiconductor equipment manufacturer came to TPA with a special screw drive requirement. The application required extremely clean motion to avoid contamination of the process or damaging sensitive optics. Further the physical size was very limited and the stroke relatively long.
The Solution: Over the course of about a year, KSS and TPA engineering worked with the customer to develop a custom ball screw to suit the application. To achieve the travel a 4mm diameter shaft was required; however, the standard ballnut design was much too large. KSS developed special asymmetrical ballnut to maintain function and minimize the cross-section. Further, special QC tests were implemented to verify.
The Challenge: A machine builder needed a large diameter rotary table for a special high tech cutting application. The challenge was that a second servo driven rotary motion was required to travel on the perimeter of the primary rotary axis. Attempting to pass sensitive motor control signals and high power motor current through a set of slip rings appeared to be expensive and a reliability risk.
The Solution: TPA engineering designed an eloquent solution utilizing a large diameter FMB bearing (flat mount bearing) and a hand full of custom machined parts. The system maintained the two independent axes of motion without the need (and risk) of slip rings or complex a pulley system.
The Challenge: A manufacturer of wire bonding equipment wanted to replace a manual XY stage used for setup with a motorized stage to increase productivity. The difficulty was finding a motorized stage with the same 4 inch x 4 inch x 1.374 inch space envelope and mounting hole patterns.
The Solution: TPA engineered a custom XY stage to meet the dimensional, mounting, stroke, and precision requirements at a competitive cost. By meeting the envelope and mounting pattern requirements, the OEM could offer both a motorized system to new customers and a retrofit opportunity to existing customers.