“Curtains” in engravings

Thank you everyone for jumping in, I really do appreciate it. This community is awesome.

@dougl I cleaned my lense and check the o-ring to ensure it was secure.



Everything is as secure as it can be. I have a K40, my first laser, and that thing is wobbly. I mean how can this flimsy piece of metal hold that mirror stable?? The K40 doesn’t have this type of pattern going on. What an amazingly cheap piece of tech that just works.

Here are the settings I have setup for FluidNC.

I don’t think my acceleration values are out of the question. As a matter of fact, the image in one of my prior posts that I engraved on pine (just a square) I had adjusted the acceleration down to 1000 mm/sec2.

Sorry for this, the forum wouldn’t let me upload a text file???

name: "TMC2209 XYZ  Laser"
board: "FluidNC 4X 2209"

stepping:
  engine: I2S_STATIC
  idle_ms: 255
  dir_delay_us: 1
  pulse_us: 4
  disable_delay_us: 0

axes:
  shared_stepper_disable_pin: NO_PIN
  
  x:
    steps_per_mm: 200
    max_rate_mm_per_min: 18000
    acceleration_mm_per_sec2: 3000
    max_travel_mm: 750
    homing:
      cycle: 1
      mpos_mm: 0
      positive_direction: false
      seek_mm_per_min: 3000
      feed_mm_per_min: 240
    
    motor0:
      limit_neg_pin: gpio.36:high
      limit_pos_pin: NO_PIN
      limit_all_pin: NO_PIN
      pulloff_mm: 5
      tmc_2209:
        uart:
          txd_pin: gpio.16
          rxd_pin: gpio.4
          rts_pin: NO_PIN
          cts_pin: NO_PIN
          baud: 115200
          mode: 8N1

        addr: 0
        r_sense_ohms: 0.110
        run_amps: 2.0
        hold_amps: 0.500
        microsteps: 32
        stallguard: 0
        stallguard_debug: false
        toff_disable: 0
        toff_stealthchop: 5
        toff_coolstep: 3
        run_mode: CoolStep
        homing_mode: CoolStep
        use_enable: false
        direction_pin: i2so.1:low
        step_pin: i2so.2
        disable_pin: i2so.0

  y:
    steps_per_mm: 106.67
    max_rate_mm_per_min: 12000
    acceleration_mm_per_sec2: 1500
    max_travel_mm: 410
    homing:
      cycle: 1
      mpos_mm: 0
      positive_direction: false
      seek_mm_per_min: 3000
      feed_mm_per_min: 240

    motor0:
      limit_neg_pin: gpio.39:high
      limit_pos_pin: NO_PIN
      limit_all_pin: NO_PIN
      pulloff_mm: 5
      tmc_2209:
        addr: 1
        r_sense_ohms: 0.110
        run_amps: 1.800
        hold_amps: 0.500
        microsteps: 32
        stallguard: 0
        stallguard_debug: false
        toff_disable: 0
        toff_stealthchop: 5
        toff_coolstep: 3
        run_mode: StealthChop
        homing_mode: StealthChop
        use_enable: false
        direction_pin: i2so.4
        step_pin: i2so.5
        disable_pin: i2so.7

  z:
    steps_per_mm: 400
    max_rate_mm_per_min: 200
    acceleration_mm_per_sec2: 25
    max_travel_mm: 200
    homing:
      cycle: 2
      mpos_mm: 0
      positive_direction: false
      seek_mm_per_min: 200
      feed_mm_per_min: 100
    
    motor0:
      limit_neg_pin: gpio.34:high
      limit_pos_pin: NO_PIN
      limit_all_pin: NO_PIN
      pulloff_mm: 4
      tmc_2209:
        addr: 2
        r_sense_ohms: 0.110
        run_amps: 2.000
        hold_amps: 0.500
        microsteps: 16
        stallguard: 0
        stallguard_debug: false
        toff_disable: 0
        toff_stealthchop: 5
        toff_coolstep: 3
        run_mode: StealthChop
        homing_mode: StealthChop
        use_enable: false
        direction_pin: i2so.9
        step_pin: i2so.10
        disable_pin: i2so.8

spi:
  miso_pin: gpio.19
  mosi_pin: gpio.23
  sck_pin: gpio.18
  
i2so:
  bck_pin: gpio.22
  data_pin: gpio.21
  ws_pin: gpio.17

coolant:
  flood_pin: gpio.25
  delay_ms: 5000

Laser:
  pwm_hz: 5000
  output_pin: gpio.26
  enable_pin: NO_PIN
  disable_with_s0: false
  s0_with_disable: true
  tool_num: 0
  speed_map: 0=0% 500=50.000%