Use for cyclic motion

(Original Document)

Using the Module

For , the user indicates the resolution in a basic and the number of turns per .

The number of for a cycle (up to 32767) will be indicated; the position reading will be taken in the range ["0" to "resolution -1"].

The number of cycles per machine cycle (up to 32767) will also be indicated.

The cycle number value will be set in the range ["0" to "No. of cycles -1"].

The angle reading and the reading of the number of cycles can be (re)calibrated, independently or simultaneously, on the machine 0 position:

When a machine is debugged (with an absolute encoder).
Each time the machine is started up (with an incremental encoder).
The cams used can be declared for all the values of a cycle.
The activity zone of an output can be programmed between two cycles.
From one series to the next, the parts may arrive at different angles.

It is possible to adjust the angle at which the parts arrive in the periodical process without modifying either (re)calibration on position 0 of the machine or the whole in the absolute encoder.

It is possible to construct a cam profile that reacts with good precision over several cycles.

Option to force the cam output using the application program.

The use of an event cam is recommended in this case.

The "parts counter" function can be programmed to indicate the number of parts completed or to enable the action of a cam once a certain number of parts is reached.

The module can indicate the linear speed of the .

It can also provide the number of counter pulses in a cycle (only when using an incremental encoder).

The "slow shaft detection" function can be obtained on a associated to a time delay cam.

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 pulses per cycle ensure precise . For example: if the use wishes to anticipate the command of an actuator by 1ms, the encoder must be able to provide more than 5 pulses in that time.

This is the typical movement for packaging machines. The axis describes several cycles to carry out all the operations on a part. The direction of movement is usually constant.

The "reading format" is type 2. The arrival of parts is synchronized by the machine (Machine Synchro).

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

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

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

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

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

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

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.

This is all the internal data that defines the activation of the outputs according to the position reading of the axis. The cam program represents the most important part of the recipe.

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

This is the logic state which can be applied to the physical output. The maximum number of tracks is 32.

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).