@Zax Thanks Zax - looks like I bought the wrong 5.5W Laser Module then, there is no socket for power on it even though on the Banggood website it did say it was EleksMaker compatible. Thanks for your help anyway.
@Gunten-Z It looks like you could get anything from them, either Cronos or Eleks controller, maybe a TTL laser or maybe not. So it's difficult to say if it would be capable of what you want, but in general a 2.5W laser will cut felt easily.
@HuS It depends on the wood but 4mm is possible. In my opinion you will need air assist and a Z-axis as the depth of focus is insufficient. I can't speak to the cost but my experience of EleksMaker laser modules is they last much longer and have actual optical output very close to their rating, most cheaper lasers are no where near what they claim and don't last long.
If you really want to cut 4mm wood rather than engraving, look at a CO2 laser. The diode lasers are better for grey scale engraving but limited for cutting.
@sseaman No, that's totally wrong and a really dumb statement.
T2Laser like all software sends G-code commands, it is the controller (hardware and firmware) that determines how those commands are sent to the machine. It could be a 240V PWM spindle for a large CNC machine, a TTL for a low power laser driver or simple on and off for an abrasive waterjet or plasma cutter.
Using the manual laser controls (which sends G-code commands for on [M03] and off [M05]) does it respond?