Problème de gravure entre X et Y

[Lmgmo (Lmg)]

Bonjour
J’ai un petit laser perso qui fonctionnait correctement avant que je passe sur un écran TS35
Ma carte Makerbase MKS DLC 32 V 2.1 avec écran MKS TS 35 V2

Par exemple lord de la gravure d’un rectangle 50x50 mm, la gravure faite en sur l’axe X est correcte et bien marquée, alors que celle faite avec l’axe Y est pratiquement invisible
J’ai mis un scope sur les trois pins du laser et je constate que les pulses sont identique pendant les déplacements X et Y, l’alimentation 12 V ne bouge pas et reste stable (voir copie d’écran)
Aucun dur mécanique, aucun échauffement tout semble normal …
Voilà les infos sur la carte, du firmware, et de la configuration qui est la même qu’avant le PB

English:
Hello I have a small personal laser that worked properly before I switched to a TS35 screen My Makerbase MKS DLC 32 V 2.1 board with MKS TS 35 V2 display For example, when engraving a 50x50 mm rectangle, the engraving made on the X-axis is correct and well marked, while the one made with the Y-axis is practically invisible I put a scope on the three pins of the laser and I see that the pulses are identical during X and Y movements, the 12 V power supply does not move and remains stable (see screenshot) No mechanical hard, no warm-up, everything seems normal… Here is the info on the card, the firmware, and the configuration which is the same as before the PB

$I
[PRODUCER:MKS DLC32]
[V2.30(8M.H35.20221223)]
[VER:1.1h.2022122301:]
[OPT:VMPH,63,500]
Target buffer size found
[MSG:Using machine:MKS DLC32]
[MSG:No Wifi]
ok

Voila les $ configurés

$0=6 (Step pulse time)
$1=5 (Step idle delay)
$2=0 (Step pulse invert)
$3=3 (Step direction invert)
$4=0 (Invert step enable pin)
$5=0 (Invert limit pins)
$6=0 (Invert probe pin)
$10=1 (Status report options)
$11=0.010 (Junction deviation)
$12=0.002 (Arc tolerance)
$13=0 (Report in inches)
$20=0 (Soft limits enable)
$21=1 (Hard limits enable)
$22=1 (Homing cycle enable)
$23=3 (Homing direction invert)
$24=1000.000 (Homing locate feed rate)
$25=4000.000 (Homing search seek rate)
$26=250.000 (Homing switch debounce delay)
$27=1.000 (Homing switch pull-off distance)
$28=1000.000 (Spindle frequency)
$30=1000.000 (Maximum spindle speed)
$31=0.000 (Minimum spindle speed)
$100=321.110 (X-axis travel resolution)
$101=320.510 (Y-axis travel resolution)
$102=80.000 (Z-axis travel resolution)
$110=6000.000 (X-axis maximum rate)
$111=6000.000 (Y-axis maximum rate)
$112=6000.000 (Z-axis maximum rate)
$120=500.000 (X-axis acceleration)
$121=500.000 (Y-axis acceleration)
$122=500.000 (Z-axis acceleration)
$130=360.000 (X-axis maximum travel)
$131=360.000 (Y-axis maximum travel)
$132=80.000 (Z-axis maximum travel)

Merci de votre aide

LMG

[Aaron.F (Aaron)]

This is a known issue with diode lasers:

Different lines width

Hello everyone, I have a small problem. I bought a 10W Laseradapter for my Ender 3 S1. If I want to laser a rectangle, not all 4 lines are the same thickness. What could be the problem? [image]

@gilaraujo

Diode lasers, specially higher power ones >5W, are not perfect square dots

What you are seeing is the result of this
Your dot is a little rectangle, so if you move UP your beam is wider and will do a little wider mark
if you move side to side is narrower.

Rotating the rectangle by 45 degrees will reduce the effect.
(Select the design, and hit Shift + . on the keyboard)

[Lmgmo (Lmg)]

Voila le résultat d’une gravure, pourquoi un manque de puissance quand le laser ce déplace en Y ?

[Aaron.F (Aaron)]

@Lmgmo

pourquoi un manque de puissance quand le laser ce déplace en Y ?

@ednisley explained it well in this post:

@ednisley

Because an NEJE machine has a diode laser, the focused laser spot is rectangular, despite what the manufacturer may claim. If the diode is oriented to put the rectangle’s long side parallel to the Y axis, the machine will produce a wider cut along paths roughly parallel to the X axis.

A wall test will reveal the spot shape and orientation:

Guide to mechanical adjustments and maintenance

The focused spot will be on the order of 0.1 mm = 4 mil wide, so maintaining tolerances smaller than that will require exceedingly careful calibration, adjustment, and operation. The rectangular spot shape will produce different results in different directions; there is no way to correct that through LightBurn settings.

Also, here:

My y axis have more power than my x axis

why does my y axis have more power than x axis whem im cutting?

[MikeyH (Mike Hembrey)]

@Lmgmo

engraving made on the X-axis is correct and well marked, while the one made with the Y-axis is practically invisible

@Aaron.F described it. The diode laser beam is not round or square, but it is rectangular. If you remove it from the module holder and point it at a wall, you will see this difference.

When traveling along the Xaxis, the beam is parallel to the direction of travel. The beam is the narrowest in that position, so maximum power is transferred to the material.

When traveling along the Yaxis, the beam is cross ways to the direction of travel. So it is trying to burn a wider path, with less power in the actual path.

This is a known characteristic for diode lasers. The general rule is to increase the Power so you cut completely through on all sides. For burning images (raster scan) and it is important, then you would turn on the Crosshatch mode.