Laser Subcommittee Meeting 2018-07-30


  • Blake, Glenn, Kamil, Jason


  • Little red
    • Was cutting a bit slower ~8mm/s for 3mm MDF at top right and bottom left
    • Checked heights and adjusted offset from 10mm to 9mm and seemed to improve
    • Cutting at around 13mm/s for 3mm MDF
    • Still overcurrent at 24mA
    • Still tube change being pursued
      • Require end extension
      • Require tube mounts
  • Big red
    • No maintenance actions. Seemed to be cutting fine.
  • Kellogg the KH7050B
    • Kamil has installed door sensors. Wired up one to Steve's interlock board.
      • When door closed, fancy interlock sensor flash red-green. When open interlock shows green.
      • Interlock board shows 24V and 5V power lights. When interlock sensor closed, no input detected (and no output)
      • Tried scope on interlock line (had been told to expect square wave when closed) but saw nothing but noise
      • Tried unscrewing the mating piece from interlock and waving close to sensor to see if sensitive about distance - no effect
      • Tried the mating piece from other interlock and performs the same (flashing red-green)
      • Need to try removing the active piece of interlock to see if its interference from Kellogg chassis causing problem.
      • Or is it interlock board?
      • Need to pull out an interlock and take a look on work bench again.
    • Discussion on z-axis drive
      • Kamil has a larger stepper and driver on order
      • Concern that it will be large enough to strip belt
      • Considering getting larger diameter pulleys for each pole to increase torque on rods
      • Also considering replacing the ball bearing rollers at each end of pole since inspection shows they are rough (not rolling well)
    • Need to get a spare set of belts for Kellogg too - especially if we might strip z-axis belt.
  • subcommittee/laser-minutes-20180730.txt
  • Last modified: 2020/03/12 12:49
  • (external edit)