LaserUser.com Forum (formerly RDWorksLab)

Hi

My 150W co2 machine have very poor quality of engrave.

The other 60W co2 machine have a good quality for engrave on same job and same parameters.

For example, this is the same job, on RDWorks I set 20mm/s and 9.5% of power on both machines.

And the result is this: Left piece are from 150W machine, Right are from 60W machine.

Any idea of this?

Thanks.

Someone else can chime in to correct me, but I believe you have a significant difference between the two tubes in raw beam diameter and base threshold power. One of the many reasons fine engraving with higher power tubes can be hit or miss, with a fair amount more miss than hit.

BTW, the power percentage on your display is a fantasy number. It's based on your laser tube, the laser PSU, and the controller. Change any one of them, or in your case all three, and it's apples and oranges time. Have you run some actual calibration tests on your two machines to see just what your power curve is and where you hit the various power points?

9.5% pwr on a 150w machine = 14.25 watts
9.5% pwr on a 60w machine = 5.7 watts

I will assume the 150w machine is the pic on the left - Most of the lines are jagged/ragged.
Make sure the lens is snug in it's mount - it appears that something is vibrating/moving that should not to create the jagged/ragged lines.
Possibly the rails need lubrication.
I am guessing in all regards

I am surprised your 150watt fires below 11% pwr