Use in alternating motion

(Original Document)

Using the module

In this type of application, the user indicates the angular resolution. The number of counter pulses in 360° (a ), are indicated. The angle measurement will be done in the "0" to "resolution -1" interval with:

An incremental encoder, recalibrating the reading at the machine origin (cams reference) can be done with a value other than "0". Each time the machine is started up with an incremental encoder. At each machine cycle if the axis drive slips.
With an absolute encoder, the module can correct the offset of the encoder on the machine 0. This type of encoder is suitable for this type of application if the drive does not slip.

The module can correct the error due to the axis play when the direction of movement is reversed.

Brake control can be programmed on an output to generate the protective function of the "prohibited zone".

The parts counter function can be programmed to indicate the number of cycles being run.

Anticipation

For high-speed machines, it is possible to correct the following very precisely: the actuator ascent time and the internal module processing time, if required.

A fine resolution and a large number of , ensure precise .

For example: if the user wishes to anticipate the command of an actuator by 1ms, the must be able to provide more than 5 pulses in that time. The speed must be stabilized before switching to the . This is particularly important after a reversal of the direction of rotation.

Area in which the action of the outputs can be programmed.

Pulse generator with 2 signals offset by 90°. These are produced according to the movement of the axis and are counted by the module.

This is the module function which is used to adjust the axis in relation to the machine zero or to synchronize the axis in relation to the arrival of a part.

Recalibration forces the position reading to a value which is predefined by the "recalibration value" parameter (included in the pulse field of the cycle).

The module allows recalibration to be carried out systematically for each cycle or for only one cycle. This recalibration is always conditioned to the IREC input.

All of the cycles necessary to effect a complete operation of the machine.

These are all the external elements that control the movements of the machine (reducer, encoder…).

This type of encoder directly delivers the numeric value of the axis position. The position reading is kept in case of power outage.

This is the error of pulse loss in a cycle. This can be caused by the mechanical transmission of the axis. The module allows measurement of this slip (see: "deviation angle").

This is the number of pulses delivered by the axis per cycle.

Cam processor function that is used to compensate for the delay caused by the machine’s actuators.

The anticipation value is applied to all changes of track status. It is specified by the "anticipation factor" defined in the recipe parameters (value between 0 and 32 767 x 50 micro seconds).

Position sensor accepted by the module It can be incremental, SSI absolute or parallel (via Telefast ABE 7CPA11).

Logic state which switches to 1 when an angular value in the cycle is overshot and which resets to 0 according to the type of cam.

A cam is systematically associated to one and only one track. Several cams can be associated to one track.