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X / y range

Added by leenvw about 10 years ago

tested different setting, but still stuggling with the range of the laser.

The HOME position is OK now and the laser moves to the left when starting. However, the object is still much to big. Also in VisiCut, the object's size looks OK. Laser bed size also OK.

Maybe the setting in the config are wrong somewhere, see attached. Mind that I use the StepSticks.

config.txt View - config file I used (2.44 KB)

Schermafbeelding 2012-07-19 om 11.55.32.png View - VisiCut screenshot (117 KB)

Schermafbeelding 2012-07-19 om 11.55.16.png View - Laser cutter settings (64.4 KB)


Replies (5)

RE: X / y range - Added by pieterb about 10 years ago

Interesting : your setting for y.scale and y.home are positive mine are negative and i am using pololu stepper drivers

your settings for y:

y.scale 158516 ; axis scaling [steps/meter]
y.homedir 1 ; state of the direction signal when homing
y.home 205000 ; home positions [um]
y.min 0 ; minimal position [um]
y.max 200000 ; maximum position [um]
y.rest 200000 ; rest position [um]
y.speed 1000 ; maximum speed [mm/sec]
y.invert 0 ; Invert signal polarity for step signal [1/0]

my setting for y:

y.scale -157950 ; adjusted scaling
y.homedir 1 ; state of the direction signal when homing
y.home -15000 ; home positions [um]
y.min 0 ; minimal position [um]
y.max 200000
y.rest 200000 ; rest position [um]
y.speed 1000 ; maximum speed [mm/sec]
y.invert 0 ; Invert signal polarity for step signal [1/0]

I find these setting a but confusing anyway um is micromillimeter so when i change mine to y.home = -10000 it should offset home 4 mm right ?

RE: X / y range - Added by jaap about 10 years ago

Try cutting a 2x2 cm cube. Does it come out 2x, 4x or 8x the size you expected? Then your steps/mm are not right, compared to the StepStick microstepping settings. If you get random differences, your StepSticks might not get enough power.

Microstepping issues can be solved in two ways:
  • If you did not yet solder the left and middle pads on the back of the board, next to the back of Pololu footprint, you should do so to enable microstepping.
  • If you already have microstepping enabled, it might be you're trying to use settings meant for 16x microstepping, which the StepSticks cannot do. In that case, you should divide the number of steps/meter by 2.

RE: X / y range - Added by jaap about 10 years ago

@Pieterb:

You configured 0 for Y on the TOP of your machine. Normal is have (x=0, y=0) in the lower left corner, like Leen has.

RE: X / y range - Added by Anonymous about 10 years ago

my mistake - I'll reconfigure when I get back, please adjust the wiki to avoid further confusion

RE: X / y range - Added by leenvw about 10 years ago

Here are my settings. Still the origin is right under, and the laser is cuttign upside down. I tested a square of 270 x 200. I have to play with that a bit. The sqaure of 20 x 20 mm was cutted the right size.

Attached my config.

config.txt View (3.23 KB)

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