1. Slab Mill Rollin Bicskei and Travis Haley

2. Problem Statement Design and build a mill that will auto- matically cut junk slabs to standard firewood lengths.

3. Background After the client is done processing logs in to lumber there are leftover slabs unfit for standard use. Instead of wasting the wood it can be processed in to firewood.

4. Specifications PTO shaft driven, 550rpm, 34hp Hydraulically powered drive units 12-24” cuts off of 16’ slabs Maximum width of slabs 20” Manually loaded slabs Portable, most likely on a trailer

5. System Diagram Conveyor Adjustable Stop Saw Blade Gap between conveyors Conveyor Roger Howes Wood Slabs Clamp 1 2 3&4 5 6 7

6. Electrical System Diagram PLC Cut Length Selection Buttons Slab Fully Advanced? Sensor Mechanical Stop Pos. Sensors Clamp Pos. Sensors Saw Vert. Pos. Sensors Conveyor Motor Valve Worm Gear Motor (Horizontal Positioning) Chainsaw Motor (for motion) Valve Chainsaw Valve Mech. Stop Motor (Vertical Positioning) Sensors (Input) Mechanisms (Output)

7. Hydraulic System Schematic

8. Mechanical Stop

9. Conveyor

10. Cutting Mechanism

11. Mechanical Stop State Diagram Raise stop Stop- right Pause 16” 20” 24” Lower Stop To conveyor S.R. State stop==up Stop==right lengthsel.==24” lengthsel.==20” lengthsel.==16” dist==16” dist==20” dist==24” stop==down raise stop lower stopmove left move right Pause lengthsel.==dist lengthsel.!= dist

12. Conveyor State Diagram pause Conv- eyor off Conv- eyor on From mech. Stop routine To clamp routine stop==down stop sensor == 1 conveyor != on State Conveyor Status

13. Clamp State Diagram Pause Raise clamp Lower clamp To saw routine From saw routine To stop routine conveyor==off clamp==down From conveyor routine clamp==up State raise clamplower clamp

14. Saw System Diagram State raise sawlower saw Pause Cut- ting Raise Saw to clamp routine from clamp routine clamp==down saw==through saw==up