Enco 25 - Table, Feed, and Surface Finish Problems; Vibration, Stalls, and Noisy Operation

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(b) Spindle loosening up and down - Make two of inner bearing covers on the top tight each
other. Do not over-tighten two inner bearing covers with the taper bearing; it is ok as long as
no gap between them.
(c) The gap of taper sliding locate too wide - Adjust the tension of bolt in proper.
(d) Loosening of chuck - Fasten chuck.
(e) Cutter is dull – Re-sharpen it.
(f) Work-piece has not hold firmly - Be sure to tighten work-piece.
(7) Micro feed does not work smoothly:
(a) Loosening of clutch - Be sure to tighten it.
(b) Worm and worm shaft has worried out - Replace with new one.
(c) Loosening of hand-wheel fixed screw - Be sure to tighten it.
(8) Without accuracy in performance:
(a) The balance of the work-piece - must be considerate as the principle balance while holding
work-piece.
(b) Often use of hammer to strike work-piece - Forbidden to use hammer to strike work-piece.
(c) Unaccurate horizontal table - Cheek and maintain table for keeping accurate horizontal after a
period of use.
(9) Excessive vibration:
(a) Motor out-of-balance. – Balance or replace problem motor.
(b) Bad motor. – Replace motor.
(10) Motor stalls:
(a) Over feeding - Reduce feed rate.
(b) Dull drill – Sharpen drill and keep sharp.
(c) Motor not building up to running speed. – Replace or repair motor. Check fuses in all three
legs on three phase motors and replace if necessary.
(d) Bad motor. – Replace motor.
(11) Noisy operation:
(a) Excessive vibration. – Check remedy under excessive vibration.
(b) Improper quill adjustment. – Adjust quill.
(c) Noisy spindle. – Lubricate spindle.
(d) Noisy motor. – Check motor bearings or for loose motor fan.
(12) Drill or Tool heats up or burns work:
(a) Excessive speed. – Reduce speed.
(b) Chips not clearing. – Use pecking operation to clear chips.
(c) Dull tool. – Sharpen tool or replace.
(d) Feed rate too slow. – Increase feed enough to clear chips.
(e) Rotation of frill incorrect. – Reverse motor rotation.
(f) Failure to use cutting oil or coolant (on steel). – Use cutting oil or coolant on steel.