MILLING MACHINE OPERATIONS - OD1644 - LESSON 1/TASK 1
This adjustment is made by means of the 1/4-20 x 3/4 socket set
screw immediately behind the feed cam housing.
With the clutch disengaged, tighten the set screw (clockwise)
while moving the quill down by means of the hand lever until a little
roughness can be felt.
Ordinarily trouble will not manifest itself except when actually
working with the machine.
Slide Ways Forking Hard Or Binding.
Cause - The gibs are out of adjustment, they are either too tight
or too loose. This causes the gib to "wedge."
Remedy - Adjust the gibs.
Cause - There is dirt in the slide ways.
Remedy - Wash out slide ways with light oil.
Chatter Or Vibration When Cutting.
Cause - Dirt in the spindle taper, causing a bad fit between the
tool holder shank and the spindle taper.
Remedy - Clean the spindle taper and the shank of the tool holder.
Cause - Faulty shank on the tool holder.
Remedy - Replace the shank or dress off the burrs, if they are due
Cause - Gibs poorly adjusted on the slide ways, or dirty.
Remedy - Clean and adjust the gibs as required.