Rocketronics ELS 4 Basic - Making Threads

MAKING THREADS
The electronic lead spindle transforms your conventional lathe into a universal thread lathe. If
you have motorized both axes, you can turn threads of all kinds, inside and outside, fully auto-
matically.
It doesn‘t matter which ank angle you cut, or which type of thread. In addition to metric threads,
imperial threads are also possible, as well as trapezoidal threads or pipe threads. Also tapered
and multi-start threads are possible, as well as the repair of damaged threads (re-cutting).
The input required is the feed rate corresponding to the thread pitch. The thread depth is en-
tered via XP, ZP denes the length of the thread.
The pitch of inch threads must be converted to mm. 24 threads per inch are e.g. 25.4 / 24 =
1.058 mm
The working principle of the ELS absorbs speed uctuations of all kinds, you can also stop
the spindle between cuts, move the slide back and forth using the travel keys, turn the chuck
around, test the thread and then turn it again, all this is no problem, the thread groove is hit
again and again.
Important: As long as the thread is not nished, you should not go over the permitted 1200
rpm on the main spindle, otherwise the position can get lost. Basically you shouldn‘t exagger-
ate the speed and should rather drive slower, then the necessary starting distance is shorter.
Before each start, you can select the number of passes and the depth of infeed, as in the other
cycles, and change them quickly and easily by turning the knob. Set the number of passes to
1 to make a cut to full depth, this is often useful to remove the last material residues from the
thread!
In order to achieve the correct feed rate at the zero point, a starting distance is required for the
Z axis. The cutting edge is therefore positioned before the zero point around this starting dis-
tance in order to approach from there. This starting distance is calculated by the controller on
the basis of the motor parameters, the speed and the desired acceleration before each pass.
The greater the thread pitch and spindle speed, the greater the required starting distance. It
is therefore recommended to reduce the speed for very high pitches in order to reduce the
starting distance.
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