How Crest pulls a step
The load line is the record.
The ladder from the bench stands over the low frame. The rope leaves the winch in the open middle, clear of the upright, and hooks the upper step. The tablet stands to the side of the ladder, facing the operator. The strain gauge stays in the line, and its cable runs into the controller beside the motor.
Choose the frame
This is the list of rigs. Pick the frame you are testing. The board on that frame runs the winch. Crest only hands it the plan when you press Strain, then records what happens.
Checking the frame…
Checking the board…
What you send to the board
- Strain — loads the plan onto the board. The board pulls to the set force, holds, and steps by itself.
- Hold — ask the board to hold now (still decided and driven on the board).
- Pay out — the board pays out.
- Stop — the board stops both relays.
After Strain, the closed loop (strain, hold, step, fail) runs on the board. Crest is not in that control loop. A pass needs the full hold. Peak load, step, and photographs stay on the test for the certificate.