00194614-08 Trainingsdoku. SG X-Serie_X4i SW70x (AL2)_EN - 第196页

Gantry Mechanical Adjustment of the Incr emental Encoder Track Signals a nd Zero Pulse Student Guide SIPLACE X-Serie and X4I SW70x (AL2) 196 Anticras h Function 6.3.3.5 Anticrash Function Example of the anti crash functi…

Gantry

Settings Anticrash Function for the A364 Axis Card

195 Student Guide SIPLACE X-Serie and X4I SW70x (AL2)

Anticras h Function for the A364 Axis Card

6.3.3 Anticrash Function for the A364 Axis Card

Anticras h Function for the A364

6.3.3.1 Anticrash Function for the A364

▪ The anticrash function is no longer provided by the anticrash board but instead by the A364 software

(application 1). This means that the proximity switches used to monitor the travel range and the

sensor for monitoring the gantry spacing are no longer required.

▪ Tasks:

– Monitoring the X and Y axis travel ranges

Evaluation of the actual position of the respective axis in the direction of the bumper, based on

the speed.

– Monitoring the distance of both Y axes in a placement area

Evaluation of the actual position of the own gantry and the partner gantry at gantry crash

monitoring.

– Count error monitoring of the gantry axis

Monitoring incoming count pulses (edge control) over time.

Anticras h Monitoring for t he A364

6.3.3.2 Anticrash Monitoring for the A364

The anticrash function is activated after the X/Y axes have been referenced. When the gantry axes are

referenced for the first time, anticrash monitoring is not active, which does not matter, due to the low

reference speed.

After this, the bit is set for the anticrash monitoring function and the actual position for the relevant

partner gantry is continuously communicated via the SPI Bus.

The following information is exchanged between the Y axes:

▪ Actual position and speed of the own gantry

▪ Status information (reference state, anticrash monitoring state ).

Error "Gantry Crash"

6.3.3.3 Error "Gantry Crash"

A “gantry crash” error is established by calculating the position difference and speed difference for both

axes. A gantry crash error is signaled via the axis card and the CAN Bus. The servo is released for both

axes and both need to be referenced again.

Count Error:

6.3.3.4 Count Error:

If the axis board detects a "fatal count error", the axis concerned will be released and the anticrash

function disabled. The other axis is informed of this in the status information and will also disable the

anticrash function. The released axis now needs to be referenced again.

after which the anticrash function will be re-enabled for both axes.

Gantry

Mechanical Adjustment of the Incremental Encoder Track Signals and Zero Pulse

Student Guide SIPLACE X-Serie and X4I SW70x (AL2) 196

Anticras h Function

6.3.3.5 Anticrash Function

Example of the anticrash function sequence in placement area 1

Mechanical Ad justment of th e Incremental Encoder

6.3.4 Mechanical Adjustment of the Incremental Encoder

The incremental encoders (read units) on the X and Y axis are adjusted mechanically to a distance of

0.4 mm +/- 0.1 mm to the incremental scale.

After this adjustment of the incremental encoder you have to check the zero pulse and track signals.

Track Signals and Zero Pulse

6.4 Track Signals and Zero Pulse

NOTICE

To set this distance, use one or more feeler gauges (small plastic disks) with a total thickness

of 0.4 mm.

NOTICE

Since 2007 a new read head is fitted. A larger measuring window allows you to reliably

compensate contaminants on the incremental scale (up to approx. 2.5 mm).

Gantry

Track Signals and Zero Pulse Checking the Zero Pulse Signal

197 Student Guide SIPLACE X-Serie and X4I SW70x (AL2)

Checking the Zero Pulse Signal

6.4.1 Checking the Zero Pulse Signal

The zero pulse must be reliably and clearly recognized by the read head. To ensure this, you can check

both the analog and the digital zero pulse. Electronically controlled settings can not be performed on the

incremental length measurement system.