i bought a sieg c2 lathe labelled another brand. The previous owner had a problem with the control board . It has a 300w dc motor .
Is there a cheap solution for the control board? or should i fit a ac motor with a frequency modulator?
To go variable-freq AC, you would need a VFD and a very small 3-phase induction motor.
You could fit a brushed single-phase AC motor ( universal motor ) and a Triac phase control ( "light dimmer" ), but would probably run into torque and cooling issues.
Either way, replacing the motor involves issues with motor size, speed, mountings, shaft diameter, pulleys, etc.
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will put a ac 3 phase motor on the mini lathe.
From 300w dc motor to a 1.5 kw ac motor,
the board has 2 problems :
1- the price
2- the failure rate of this boards . i think that most of this failures comes from setting the lathe speed to low sending a surge in current.
The 1.5kw is the motor that i have available.
I can change the 550w ac motor from the bv20l clone that i have and install the 1,5kw on the bv20l.
I have a smaller 0,37kw but i think that will be weaker that the 300w dc motor.
LY-820 board looks a bit smaller than the original c2 board. the transistors on the original are 4 or 5 on the ly-820 i think there are only 2.
The LY-820 board can handle as good as the original board? on the low rpm high torque?