Wavy Cuts and Bad Etching

[LaserGoodies]

I bought my controller from Light Object and installed it with no problem. I was happy that my machine was working in all the axis the auto focus worked Laser pulsed just right and all looked good untill i ran a job on the machine. When i did the etches on the part where much larger than they should be and the cutting lines where wavy to the point that i had to break the part out of the material. I would like to get help on what might be causing this since my old controller worked just fine. Attached are photos are good part with old controller and bad part with new controller.

[Tech_Marco]

Tell me more about your setup on the motor driver and the parameters on LaserCad.
By the way, make sure you have good grounding on the laser machine.

The pictures showing that the motors were escaping steps. How fast did you run it?


Marco

[LaserGoodies]

Attached are screen shoots of LaserCad setup. as well as photos of my machine and the motor controllers.
This is the Controllers Page
http://www.leadshine.com/productdetail. ... del=3ND583
This is the Stepper
http://www.moonsindustries.com/products ... HB3P_24HC/

[Tech_Marco]

Better to post the setting on the driver in writing than the picture . Plus， you didn't post the resolution you used for the motor: 1/8 or 1/16, ot other?

Is your machine coming with 2:1 reduction gear on both X and Y?

Check the tention on the belt and the laser head see if anything got lose

Marco

[Tech_Marco]

Is it a K40 small machine?

[Tech_Marco]

Forget my last question, your is not K40

Can you show me the connection of stepping driver to the DSP?
Need to see DIR,PUL, and Pwr connections


Marco

[LaserGoodies]

This is machine is a LS1390 http://www.alibaba.com/product-gs/86211 ... laser.html
Belts are right where they should be and the head is good. with the drivers powered i Can Not move it at all.

The Machine has a 1:3:1 Ratio on the gear. (Photo bellow)

The X and Y stepper controllers a 400 Steps/rev. and the motors have a step angle of Step Angle: 1.2°

[LaserGoodies]

This is a photo of the connection of the DSP and the Controller.
The wires are all labelled.

[Tech_Marco]

Try cut a 100mm x 100mm square and a circle with high and low speed. Then measure the true dimension
After that, engrave a small square like 20mmx20mm and a circle .

Post the images once done


Marco

[LaserGoodies]

I just Cut 2 100mm Circles both at 15mm/s and 40 mm/s as Well as a 100mm Square that at 15mm/s and 40 mm/s. Also i rastered a 20mm square and circle at 100mm/s. The Square and Circle are not even so vary between 99.3mm and 101.5mm for the circle and the square is 99.5mm to 101.2mm

[Tech_Marco]

It look like it is either motor or the driver. You may want to do connection again and make sure each one got good contact.

Plus, you may want to consider signal shielding on signal wires; PUL/DIR. It could be the electromagnetic noise caught from the laser power supply. To test it, you may want to tight a pen to the laser head and let it draw the same diagram on a piece of paper see if it made any difference. If it can draw a perfect circle or rectangle box without the "jag" issue, that confirm that it is noise issue

Marco

[Guldberg]

Try lowering your cut acc. to 500 and see how that works. It may not fix the problem, but 1500 seams high.

[waltfl]

hi there,
in user parameter:
take down all the ACC to single thousand like 4000 instead of 40000 etc
in manufacturer settings:
change X max acc to 8000 and set both X and Y to the same max speed of 400
greetings
waltfl

Attached are screen shoots of LaserCad setup. as well as photos of my machine and the motor controllers.
This is the Controllers Page
http://www.leadshine.com/productdetail. ... del=3ND583
This is the Stepper
http://www.moonsindustries.com/products ... HB3P_24HC/

[LaserGoodies]

I have tried both of your settings and it didnt change a single thing. I have looked at the voltage to the controller and it is spot on at 24V. The Controllers and laser both have correct voltage. This problem has to be a bad controller. I am attaching a photo to show many more failed attempts at cutting with this to show that is it not consistently the same bad. If there is a way i can fully Reset the controller and/or Fully Flash the Firmware on this please let me know.

[Telrad]

Try changing the pulse from falling to rising in the motor section.