Autocut IO Definitions

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Author avatarGareth Green | Last edit 1/11/2019 by Gareth Green being drafted

Accessing IO page

The I/O page is accessed by pressing the Service button on the Settings tab. This displays a form with the Inputs and Outputs displayed as below

Autocut IO Definitions Annotation 2019-11-01 152236.jpg

Inputs are the feedback from sensors, buttons and switches and have a code beginning with "X". The state of an input is displayed as:

Green - Input inactive

Red - Input active

Outputs are used to control valves or other electrical devices on and off and have a code beginning with "Y". The output is toggeled on and off by touching the square on the screen relating to the output number.

Green - Output off

Red - Output On

Outputs In Detail

Output No Name Function
Y6 Side Clamp Brings in the guiding clamp under low pressure.
Y8 Load Clear Keeps the loading material 10 mm away from the backfence. This stops the material getting jammed.
Y10 Clamp Position Brings clamps to a central position when cutting wide sections.
Y14 Eject Extracts the cut piece from the right hand side of the saw.
Y16 Mullion Centre Centres up the pivot point of the saw blade on the material. Also brings the clamps into a central position.
Y18 Saw Cut Saw blade rises.
Y20 Saw to 90 Saw blade to 90-degree position.
Y22 Saw to 135 Saw blade to 135-degree position. Note: Y20 must also be on to achieve this.
Y24 Next Bar Activates material loading crossfeed belts. These are on a ratchet mechanism, so can only go one way.
Y26 Eject Clamp Clamp on right hand side of blade.
Y28 Eject Push Pusher arm for clearing cut material out of the way.
Y30 Z Roller Brings in support for Z-sections to prevent them tipping over.
Y32 Saw Clamp Clamp on left hand side of blade.
Y34 Clamp HIP Activates High pressure clamping on the saw clamp. The low pressure helps to keep the material from tipping when it is pushed through.
Y36 Blowers Air Blowers to prevent swarf build-up.
Y40 Z-turret Stop Rotates the Z-turret stop through up to 360 degrees.

Y6 - Side Clamp

The side clamp is brought in when cutting mitres. It holds the material square against the backfence when it is being pushed through. It is pressure controlled with a regulator to give friction to the pusher arm. This friction is needed because the arm does not grip the material, the friction stops the material running away when the arm decelerates.


Pressure regulator PR1 adjusts the amount of clamp pressure and hence friction.

Damper D1 regulates the speed that the clamp comes across.

Home Position

Clamp is towards front of machine, i.e. Clamp off.

Y8 - Load Clear

When the auto loader loads the material, it was observed that the material would sometimes rest against the backfence. When it was pushed, the friction would sometimes be too great and the pusher would stall. To overcome this problem, the Load Clear cylinders were added to give a false backfence 10 mm away from the real one.

The cylinders come out as the material is loaded, and retract when the pusher arm starts to push. This gives the material a generous amount of clearance as it is pushed through.

Home Position


Y14 - Eject

After the second saw cut, the profile is cut to length and must be extracted out of the way on to the outfeed table. This is the function of eject.

Home Position


Y16 - Mullion Centre

This controls the most innovative part of the saw - the centring mechanism. Using the side clamp assembly, this output Centres the pivot point of the saw to the exact centre of the material in the machine. This means that in order to hold the material, the machine must be using Y6 the side clamp, or Y16 mullion centre. Y6 is used for mitre cuts, where the saw pivot point is a set distance from the backfence, Y16 is used when cutting arrowheads, where the pivot point must be in the exact centre of the material.

In addition, the clamping position is changed hence this output also controls the clamp positioning cylinders.


Pressure regulator PR2 controls the pressure applied to the side clamp, and so the friction. It should be set to roughly the same as PR1, as it does the same job.

Velocity damper D1 controls the speed that the side clamp moves across, described under ‘Y6’.

Home Position

Side clamp is towards front of machine (i.e. clamp off, not centralised).

Clamp positioners are towards back of machine.

Y18 - Saw Cut

The cutting head up / down movement.


Velocity damper D2 controls the speed of the cut. There must be a balance between the fastest cutting speed and the quality of the cut. Quality of the cut unfortunately deteriorates with cut speed.

Y20 Y22 - Saw to 90 and Saw to 135

Used for positioning the head to 45°, 90° and 135°. Two cylinders are mounted back to back to give 4 possible permutations, allowing 3 positions:

Y20 Y22 Position
Off Off 45°
On Off 90°
Off On Unpredictable - not used
On On 135°


Flow control valves, mounted on the ports of the cylinders, control the speed of the rotation. Ensure all cylinders are adjusted to the same position.

Home Position

Head at 45°.

Y24 - Next Bar

Activates the autoloading crossfeed belts. Two cylinders are used side by side to give the required force to move the belts when they are fully laden with material.

Home Position


Y26 - Eject Clamp

Activates the clamp attached to the ejector mechanism on the right hand side of the saw blade.


A flow restrictor restricts the rate at which the clamp comes down, so that it will not damage the material.

Home Position

Clamp off.

Y28 - Eject Push

Activates the pusher bar that pushes the last cut piece out of the way of the ejector mechanism. These cut pieces then stack up on the outfeed table.


The speed of the push is controlled with a flow restrictor.

Home Position

Pusher is back.

Y30 - Z Support

Activates the Z support blocks. These blocks emerge from the backfence when Z sections are being cut. They act to support the section and prevent it from twisting over when the side clamp comes in.

Home Position


Y32 - Saw Clamp

Activates the clamp on the left hand side of the saw blade.


A flow restrictor restricts the rate at which the clamp comes down, so that it will not damage the material.

Home Position

Clamp off.

Y10 - Clamp Pos

Activates the clamp positioners to come out to the central position. This was found to be useful when wide sections are used, to give them more support. The wide section limit is defined as on of the parameters - widewidth.

Home Position


Y34 Clamp HIP

Clamp high / low pressure switch. When the material is pushed though, a pressure is needed on the top to prevent some Z sections from rolling over. The saw clamp does this (Y32) and the pressure is alternated between full saw clamp pressure and low feed pressure by this output. A 3 port 2 position valve uses air to switch another 3/2 valve to make the switch. The air is amplified like this because at low pressure, the solenoid pilot cannot work.

Y36 Blowers

Two Air blowers situated on the chute.

Y40 Z-Turret Stop

This indexes the Z-turret stop around ¼ turn with each press of any key.