Yaskawa and Micromech, a moving partnership

For the latest in technology of speed control and positioning products, Yaskawa are probably the best in the world

Yaskawa – Stove Knob TesterEpisode 5: Stove Knob Tester

The new production system for a stove knob tester required a mechanical setup with fixed position targets but also needed more speed, set point flexibility and a reduction in the excessive amount of scrapped products due to the open-loop stepper operation.

The end-user makes electrical ignition knobs for stove tops and tests the product at the end of the production line and also orients it for shipping. The system tests 12 units at a time by clamping the knobs and turning them 1.5 revolutions. While turning, the motor is looking out for an input signal indicating that a contact inside the knob was being made. When the signal is received the motor turns a preset distance, waits for a short period, and then goes to zero position waiting for the new test cycle to start. The machine zero position is established on ‘power up’ via the 20-bit absolute encoder built into the motor. The distributed servo network allows easy and reliable connection of 12 servo axes with room for expansion for up to 16 axes if necessary, all at no additional control cost.

The performance achieved by these changes is a throughput of 2000 parts per hour and an accuracy of ±2 degree per placement. The differentiating features of this solution are a 16 axis controller in a super compact package, target positions can be preset or over written by operator and absolute position feedback. The Modbus communication is to a RedLion HMI.

The resulting benefits of this solution are that the IEC 61131-3 programming environment allowed a faster implementation and commissioning time. The ‘no homing’ process on power up saves time and the machine now has a greater range and flexibility of product testing. This has achieved unbeatable price/performance combination which has saved money and justified the project.

Micromech is the UK distributor and systems integrator for Yaskawa motion products, for more information contact Stirling on 01376 333333 or stirling@micromech.co.uk


One Response to Yaskawa and Micromech, a moving partnership

  1. Pingback: Yaskawa and Micromech, a moving partnership | Converting Guide

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