I am looking for power and speed setting advice for cutting 1/8" (3mm) Chipboard (like solid cardboard/ mat board).
New here, just starting to learn. Working with a Longer B1 30W on Mackbook Pro. Thank you!!
You need to find your machine’s capabilities/limits by testing all the materials you want to work with. This gives the best learning curve and the best results. If you find lists of parameters from “similar” machines, you can only use them as a starting point, the difference between machines, even the same types, can be large.
Look at it this way, doing material tests is part of production, if it is to be effective then you have to be sure that the machine parameters are perfect. Use leftovers to practice, it is actually fun to find the perfect parameters for your machine - and remember to save your information 
I always do a small standard test, even if I know exactly which settings to use, mostly to be sure that the parts fit together. You can rarely count on the material having the same thickness, so finger joints for example. will not fit if you have 3.2mm material but “expect” 3.0mm thickness.
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This was my material test, wasnt great. Unfortunately this chipboard just happens to be the required material for my Architecture design 4 final.
There is hope ahead;-) What you call chipboard, is it MDF? 1/8 inc. is about 3mm and your Longer B1 30W should easily be able to deliver a nicer result.
Check if your focus is on the spot, you have enough air support and position your material in a way that the MDF can get rid of the burnt residue, either honeycomp or small blocks or spikes will do this job.
Do another test with 850 mm/min max speed, I think you should end up between 300 and 400 mm/min, but I’ll see if I can find the test data from my Longer machine and report on it later.
But, concentrate on focus and air support in the first place.
Sorry for the delay, but 325 mm/min with a 20 Watts Longer diode laser, that’s the speed of “our” machine for nice results on MDF.
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