First specify the class and the lead of a thread. The thread accuracy, α,
will be obtained at (1), and depending on the time constant of cutting feed
acceleration/ deceleration, the δ
value when V = 10mm / s will be
obtained at (2). Then, depending on the speed of thread cutting, δ
speed other than 10mm/ s can be obtained at (3).
Time constant of
See the graph in reference later in
the manual for an actual example.
The equations for δ
, and δ
are for when the
acceleration/deceleration time constant for cutting feed is 0.
D How to use nomograph