hardinge hc lathe blowing fuses

[Garrettbenell]

my hardinge chucker lathe model hc keeps blowing a 2fu fuse when i turn on the machines main power, any idea what is causing this?

[Al_The_Man]

If you have the schematics it should show right away what 2FU is feeding, blowing right away before any control circuits have been turned on by releasing the E-stop etc, points to transformer or other component that is enabled on power up, you may have to remove other fuses down stream to try and isolate it if you do not have machine prints!
Could also be a ground fault on whatever it is feeding.
Al.

[Garrettbenell]

just turned on the main power switch and it doesnt blow the fuse, but when i hit the pull start it blows the fuse.

[Andre' B]

Maybe not related but we just had a little Hardinge lathe with a worn out forward reverse cam type switch.
If the lever was moved just right the switch would make before break and blow a fuse.