Thanks for the replies guys!!

First...I'm 58 and keep switching between metric and imperial - I tend to look at the tape measure and take the nearest one!! sorry :-((

Ok......... I'm using Nema 23 type motors from China - supposed to be 1.7nm models.

I'm using a generic driver board with 3 Toshiba TA8435 chips mounted on a large heatsink with two fans cooling it......I'm running in 1/8th step mode...could this be the problem?

Power supply is 27volt 13 amp switch mode type (Chinese).

Mach3 software. I have tried adjusting each motor axis but as soon as I try to get it a bit faster the motors stall....my knowledge of Mach3 is severely lacking:-((

I would like to use my old Toshiba laptop (normal printer port) so I don't have to drag the machine up three flights of stairs in this 100 degree heat but Mach3 doesn't support laptops - anyone out there using a laptop?? if so what (simple) software is available??

Oh...the threaded rod is not too bad friction wise but my 'precision' engineering is a bit rough so I don't think everything is perfectly aligned just yet...but I'm trying!!

The machine is currently in bits as my x axis was too 'wobbly' (technical word) as I tried to cheat and only use one pair of linear bearings....I am redesigning it now for two sets :-0

If this works there may be a picture.........nope thought not!

Anyone tell me how to upload an image??

I'll get back to work on it and advise any progress.....many years ago I built a mini excavator in my garage so I keep telling myself this CNC business should be easier!!!

thanks again............