Hi guys.
I haven't been here for a while because of work. But now all of a sudden my lathe has electrical issues.
Just one at the moment.
Whatever speed I use the rpm's are not stable. The lower the spindle speed the more it fluctuates.
This almost feels like the motor is getting low power at one point and then double power the next point.
It appears that only when under a big load this problem does not surface.
The lathe is some asian one bought from Finland.
Make and model is as follows. Nova 290VF x 700G
http://www.koneita.com/metallisorvit/metallisorvi_nova_290VFx700G.htm
Now the system is using a potentiometer for controlling the motor speed.
The lathe is built using 220V motor and only 1 phase.
And the power is coming directly from the powerbox or powershield. I am not sure what is correct.
I do have some kind of schematics of the system, but since it was written by the asian plant, I am not sure how accurate it is.
The most annoying thing is that the slowest speed is around 50rpm, and with that speed the rpms fluctuate between 35-80.
I will try to make a short video about this.
Hope someone can help me.
I haven't been here for a while because of work. But now all of a sudden my lathe has electrical issues.
Just one at the moment.
Whatever speed I use the rpm's are not stable. The lower the spindle speed the more it fluctuates.
This almost feels like the motor is getting low power at one point and then double power the next point.
It appears that only when under a big load this problem does not surface.
The lathe is some asian one bought from Finland.
Make and model is as follows. Nova 290VF x 700G
http://www.koneita.com/metallisorvit/metallisorvi_nova_290VFx700G.htm
Now the system is using a potentiometer for controlling the motor speed.
The lathe is built using 220V motor and only 1 phase.
And the power is coming directly from the powerbox or powershield. I am not sure what is correct.
I do have some kind of schematics of the system, but since it was written by the asian plant, I am not sure how accurate it is.
The most annoying thing is that the slowest speed is around 50rpm, and with that speed the rpms fluctuate between 35-80.
I will try to make a short video about this.
Hope someone can help me.