mini saw speed controller 230v 480W 10,000 rpm

[rjsutton]

Hi i brought a mini table saw which came with a combination off-on-speed controller. when started the motor "pulses" it seems to reach speed then just drops off then starts up again. the faster the speed controlled the faster it pulses and dies.
10,000 rmp is over twice what i want to use a rpm
I tried a 500w fan -light dimmer but that let all the magic smoke out.
Can someone answer if a 500W ceiling fan speed controller work with this motor. ive already blown $25 for the dimmer and a 500w fan controller is $50.
or do i need a AC 220V 4000W SCR Voltage Regulator Dimmer Electronic Motor Speed Controller
specs
input voltage: AC 220V
Voltage regulation: AC 0-220V
Maximum power: 4000 W
Current: 25A
as in pic

appreciate any help
regards Richard