User:Mct/johnson-bandsaw-notes

stuff related to the Johnson Bandsaw use & authoriation

general

notes on use

things that should be done to turn the machine off, & which should be done inversely, in reverse, when cleaning up after a job

things to check when clamping stock / notes on their use

if the stock is short enough such that the movable jaw cocks when placed against it, the jaw should be shimmed
if the movable jaw can be moved by hand, it's disengaged from the clamping screw; make sure the engagement lever is facing away from the operator, to engage the jaw with the screw
- hold the movable jaw tight against the work
- engage the jaw with the screw
- tighten the vice with the clamping wheel
rehearse the whole descent by hand, unpowered & without stock in the vice, to make sure the movable blade guide won't crash into the movable jaw

notes on controlling descent resistance

prefer the hydraulic cylinder to the movable weight
lock the jaw much wider than the stock to cut when powering on the motor, so you have lots of time to find a good descent speed before the blade engages
do not overtighten the cylinder valve control knob, in either direction

things the authorizee should be doing when they run the machine

plug it in
work holding
- gauge stock width
  - shim vice if too short
- rehearse descent to ensure clearance
  - exposed blade width should be as short as possible
- lock saw open
- clamp stock
  - hand-tighten
  - engage with screw
  - fully tighten with wheel
  - check work is secured by trying to wiggle it by hand
pre-cut parameters
- disengage emergency stop
- select desired speed
  - determine with blade pitch, material
take cut
- do not lubricate
  - engage main control lever
    - make sure blade speed is correct
  - unlock saw
  - find proper descent speed
- post-cut
  - disengage main control lever by hand
lock saw open
remove stock
- unclamp with wheel
- disengage movable jaw from screw
cleanup
- brush excess chips off machine
- put any left-over material in bucket
job end
- unlock saw & let it close
- turn off
  - engage emergency stop
  - make sure main control lever is disengaged
  - unplug machine
  - coil power cord around control panel