Spent a bit of time investagating this.

System powered up and x,y & z steppers locked .................25.8v 1 amp
X fast traverse, Y & Z locked........................................1.4a mp
as above plus heavy load added manually
( in use it will never be anywhere near this load)..................2.0 amp
Y as above............................................. .................Same
X+Y fast traverse Z locked............................................ 2 amp
z fast traverse x &y locked...........................................1 .1amp

Voltage pulls down <1volt


My motors are supposed to be 2.4amp each so I conclude that power supply is well big enough and motors are never loaded to their full rating.

Conclusion. Power supply 'seems' validated.



Any thoughts?