Restrictions

A restriction is a condition the machine wants you to get out of: an end stop, an open door, a force or length limit. It shows in the Restriction badge on the Control screen and, while motion is on, in the amber status banner with its remedy.

What a restriction does:

• It does not switch motion off. The carriage can still be moved, so a sample is never left stranded under load.
• It caps the speed of every move at Restricted Velocity from the machine configuration, including one already under way.
• It clears by itself as soon as the condition ends.

Set Restricted Velocity

A Restricted Velocity of 0 means no cap: the badge shows, and nothing slows down. Set it to a speed you're comfortable backing off an end stop at.

The two sample limits also stop a running test.

Only one restriction is shown at a time: the first in the order below.

SAMPLE_LENGTH

The sample reached its maximum displacement.

Only checked while a test is running. Extension passed Max displacement in the sample profile.

What to do: The machine has stopped the test. Jog back, then raise the limit in the sample profile if it was too tight.

SAMPLE_TENSION

The sample reached its maximum force.

Only checked while a test is running. Sample force passed Max force in the sample profile.

What to do: The machine has stopped the test. Jog back to unload the sample, then raise the limit in the sample profile if it was too tight.

MACHINE_TENSION

Force is above the machine's own limit.

Machine Force is above Tensile Force Max in the machine configuration. Checked all the time, test or not.

What to do: Jog down to relieve the load. If it shows with nothing loaded, the load cell values are wrong: run the load cell calibration.

UPPER_ENDSTOP

The carriage is on the upper end stop.

The upper end stop switch is active.

What to do: Jog down, off the switch.

LOWER_ENDSTOP

The carriage is on the lower end stop.

The lower end stop switch is active.

What to do: Jog up, off the switch.

DOOR

The door is open.

The door interlock switch is active.

What to do: Close the door.

End stops and emergency-stop limits

Each end of travel is watched twice. The end stop raises a restriction and slows the machine. The emergency-stop limit beyond it is part of the emergency stop chain and raises an ESD_UPPER / ESD_LOWER fault, which switches motion off.