Help with X axis issues please ?

Hi All,
Being in almost lockdown soon (GB) I decided to get my old Redsail laser ( using LaserCut 5.3) up and running but its giving me some problems that I hope someone can help me with before I have to part with hundreds of pounds calling out the supplier. In short here is a brief summary of whats happening…

After testing the engraving profile the machine starts engraving as expected.
X axis slows down.
Y axis stays at normal speed.
Laser continues to engrave but seems the X axis has stepped to the left and the file is narrowed so the engraving is squashed.
Power seems to increase but this could just be the narrowing of the file.
Stopping the machine and testing the X and Y travel, the Y axis will move at normal speed and to full length of the bed. However the X axis moves very slowly and will on travel half of the bed.
Any help would be gratefully received.
Thank you in advance and stay safe.
Dave.

Hi Dave,

Sounds like an interesting issue. To clarify - before starting the engraving the X axis works as expected, moving at full speed over the entire range of travel?

Is the narrowing a gradual and progressive change or does it suddenly become, say, half the width?

Have you tried an old file that you know works?

Would you be able to share some photos of the machine and the wiring (especially inside the control cabinet) which will help as background info.

Cheers,
Andy