Mains motor speed controller

[bigegg]

I built this to control the speed of my elu mof 96 router, and the oil burner blower, but will work with any motorised tool (afaik! I'm not a lectrickshun )

It's based around a 2000w speed controller from the bay - as well as a small enclosure from screwfix (I think), and a short mains extension.

I'll post pictures tomorrow when the camera batteries have charged.

 

[rtbcomp]

As long as the motor has a commutator and no existing speed controller you should be OK

 

[Robotstar5]

I don't know how they can sell a speed controller for less than a couple of quid including postage from HK

 

[Robotstar5]

7 pence worth of parts made next door, 3 pence of labour, government subsidised bulk shipping.

Probably similar to a digital voltage display that plugs into cigar lighter I bought, £1.69 delivered!.

 

[123hotchef]

perfect for that cheapish die grinder perhaps

 

[123hotchef]

I built this to control the speed of my elu mof 96 router, and the oil burner blower, but will work with any motorised tool (afaik! I'm not a lectrickshun )

It's based around a 2000w speed controller from the bay - as well as a small enclosure from screwfix (I think), and a short mains extension.

I'll post pictures tomorrow when the camera batteries have charged.

4000W even cheaper looks the same http://www.ebay.co.uk/itm/4000W-AC-...ef9b09b&pid=100005&rk=1&rkt=6&sd=171166717259

 

[bigegg]

4000W even cheaper looks the same http://www.ebay.co.uk/itm/4000W-AC-220V-SCR-Voltage-Regulator-Speed-Controller-Dimmer-Thermostat-OV/161843931556?_trksid=p2047675.c100005.m1851&_trkparms=aid=222007&algo=SIC.MBE&ao=2&asc=20140122125356&meid=862e37540eb94587bb3db140eef9b09b&pid=100005&rk=1&rkt=6&sd=171166717259

I looked at the 4000w, but according to the description, its derated to 1/3 power for an inductive load (ie, a motor)

 

[123hotchef]

I looked at the 4000w, but according to the description, its derated to 1/3 power for an inductive load (ie, a motor)

I bet the other 2000W one is too

 

[bigegg]

 

[123hotchef]

nice so it is just like a short extension lead with a controler

 

[bigegg]

nice so it is just like a short extension lead with a controler

basically, yes.

I was going to put a trailing socket but the cheapanese extension I had overheated and melted the socket so I replaced it with the pattress box.

 

[123hotchef]

good idea it woks and you can use it for other things too

 

[slim_boy_fat]

Just ordered a 4000W one to try on the Myford when I'm ready. For the princely sum of £1.24 it's hard to go wrong, even if it ends up in the bin.

 

[FoxZulu]

Just ordered a 4000W one to try on the Myford when I'm ready. For the princely sum of £1.24 it's hard to go wrong, even if it ends up in the bin.

£1.24!!! That's crazy money. Think I'll start saving up

 

[Shox Dr]

I think you'll find it's useless, as other have said to chops the voltage

Less volts= less power= no torque. No worky

Hence why 3ph motors are used in conjunction with a vfd

 

[tommullin]

great for LEDs though. you could make a decent cheap dimmer switch

 

[mechman]

£1.24!!! That's crazy money. Think I'll start saving up

Er, that's about a half a pint of ale lads, so think on before making a rash decision.

 

[eddie49]

slim_boy_fat:
"Just ordered a 4000W one to try on the Myford when I'm ready."
As others have said, this type of TRIAC-based phase angle speed controller will only work for a "universal" motor - i.e. the noisy ones with brushes and a commutator - not with an induction motor. So it will not work on your Myford.

 

[slim_boy_fat]

slim_boy_fat:
"Just ordered a 4000W one to try on the Myford when I'm ready."
As others have said, this type of TRIAC-based phase angle speed controller will only work for a "universal" motor - i.e. the noisy ones with brushes and a commutator - not with an induction motor. So it will not work on your Myford.

Thanks. Oh well, no great loss and I'll possibly find another use for it.