Thanks for all the help guys. We are now up and running
Thanks to some support from a local engineer the following issues were identified:
The air compressor pipe was blocked
The alignment was way out
I didn't know how to focus it properly
Everything was covered in soot from the series of small fires I'd caused by having a blocked air compressor pipe
The cut on HIPS isn't perfect and we may look at using a different material but playing with the speed and power settings we've got it pretty good now.
HIPS is an aweful substrate to cut, the corners round and it gives off pretty nasty fumes
It doesn't *vaporise* in the true sense, it just melts and drips away
best wishes
Dave
Please note I am not employed by HPC, any advice or recomendations I give are based on my own experience and are not necessarily the same as HPC's. First point of contact on any hardware issues should be with HPC Dave@OpticalPower.co.uk