This document, and the content contained herein, is intended for customers, users and other persons with the operation and features of the covered Hegla products. While Hegla makes every effort to include accurate and useful information, it is not possible to anticipate or address every possible situation or to account for conditions at unknown locations or interactions with unknown systems or components. Therefor, these documents must be used only for informational purposes and used in conjunction with best practices and with due care. Hegla shall not be responsible for any injuries or losses that occur as a result of the information in this document. Moreover, as products and offerings change over time, the usefulness of the information in this document may become obsolete. It is the responsibility of the reader or consumer to ensure that the information contained herein is timely and reflects the current reality of Hegla products and offerings. Hegla disclaims any and all warranties regarding the information in this document.

***Read chapter 1 of your operators manual before undertaking any work in the area of the linear drives equipment.***

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When in doubt please contact Hegla service before taking action (404) 763-9700

Installing a new magnetic reading head with linear bearing:

If you received a bearing with a reading head pre-installed then the new magnetic reading head has been mounted in the new linear bearing and adjusted to accommodate a 0.3 mm distance to the magnetic scale protection band

*Switch the machine off completely before carrying out the following steps.*

• Note the position of the reading head in relation to the linear bearing.
• Disconnect the reading head plug and loosen the cable clamps and remove the 4 bolts holding the linear bearing in place 

• Slide the linear bearing with the old reading head off the end of the guide rail.
• Slide the new linear bearing with new reading head onto the guide rail so that the reading head is in the same direction as the old one was. The plastic protective cover for the ball bearings will slide out as the new linear bearing is slid onto the guide rail.

• Check the mechanical setup of the reading head in relation to the magnetic scale, by putting a 0.3mm non-magnetic feeler gauge (the reading head should have came with a paper feeler gauge) between the reading head and the scale, the reading head should be approx. 0.3 mm from the magnetic scale (tolerance is 0.25 mm + 0.05 mm).

• If necessary adjust the distance by turning the screws on the top and bottom of the reading head mounting using a 2 mm Allen key.

• Replace the 4 bolts and tighten them equally so that the linear bearing sits square on the guide rail then re-check the 0.3mm distance to scale and adjust if necessary.

• Replace the cable clamps and connect the plug of the reading head.
• You are now ready to turn the machine back on and test.