Team SILK AX14-60, Instruction Manual

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AX14-60 Flange Facing Machine
74
Micro Roughness
Micro roughness (primary surface) is caused by the cutting action which is a combination of cutting,
tearing, and surface fatigue.
Waviness
Waviness (secondary texture) is caused by feed rate of tool, or chatter/vibration.
Form Error
Form error (tertiary texture inaccuracies of machine such as slideway of arm lift.
Components of surface finish are like a ploughed field. Roughness, earth and stones; waviness, ruts
left by the plough; form, curve of the field.
The two most common terms now in use are:
Ra, (C.L.A.) Roughness Average, Centre Line Average
R.M.S. ( )
Root Mean Square
The two standards in use today to define these are:
Metric µm (micro meter)
Imperial
63
(Root Mean Square)
By either multiplying or dividing the value by 40, conversions between Metric and Imperial can be
made.
e.g.
60
=
1.5
µm