Changes made for Pathfinder 5226 controllers.

A hemmer is an add-on to a machine that is similar to a shear in the way that it moves across the machine except instead of cutting the material it creates a hem. The 5226 does not have a dedicated hemmer operation though so the idea was to use the shear operation to move the hemmer across the machine. For more information on old logic refer to:

SCN 4310 - 5226; Added Hemmer Active Generic Parameter and Logic

The old logic need to be updated to give the operator a way to switch back and forth from a hemmer to a shear. Also to be able to perform two hems back to back. The new parameter is 469 Hemmer Active. When set to YES the shear step operation will work for the hemmer. When set to NO it will work for the shear.

Hemmer Active:

1. When the shear step is enabled the clamp will open to its open height and the backgauge will move to the (blank size – shear offset distance).
2. Clamp down pedal will move the clamp down until clamped like usual. Pressing pedal again starts the hemmer moving.
3. Hemmer will move until (shear forward maximum time * shear timer in step). Pressing pedal will make clamp open to clamp open height once reached. Operator can remove material here if they want.
4. Pressing the pedal again will move the hemmer back until the home switch is reached.
5. Clamp will open to open height and backgauge will move to (blank size – (shear offset distance * 2). Operator can then put the material back in for second hem.
6. Pressing the pedal will then start the process of steps 2 – 4 again.
7. Bend steps can then be performed.

Shear Active:

1. When the shear step is enabled the clamp will open to its open height and the backgauge will move to the (blank size – shear offset distance).
2. Clamp down pedal will move the clamp down until clamped like usual. Pressing pedal again starts the shear moving.
3. Shear will move until (shear forward maximum time * shear timer in step).
4. Pressing the pedal will return the shear until home switch is reached. Clamp will open to open height.
5. Bend steps can then be performed.