Instructions for Operating SPARO's Blank-off Wheel

  • The blankoff wheel, grid adjuster knob, and two heat switches are all properly labelled for easy identification.
  • Read the number on the knob to determine if blank-off wheel is open or closed.
  • The closed position should read 600 on the blankoff wheel knob.
  • The open position is should read 000 on the knob.
  • To go from closed to open, turn the knob clockwise, i.e. from 600 decreasing to 000.
  • To go from open to closed, turn the knob counter-clockwise, i.e. from 000 increasing to 600.
  • I.e. you never want to go through 800.