Soft-Start for 1400W electric motor

I have recently bought a Bosch PTS-10 table saw. No timber-cruncher but fine for light, accurate cutting. Except the "chunk" at start up. Has anyone any advice and/or experience on fitting a soft-start mechanism to such a moter ? It is rated at 1400 watts and I am almost sure it is a simple universal type.

Can I expect any interaction with the no-volt-release switch ?

Even Chinese routers get soft-start these days; how stupid of Bosch not to fit one. Thanks in advance.

Reply to
Rob
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It sounds a bit unusual to want soft start on a table saw. You would never feed the job in, until it was up to speed anyway.

Routers get soft start in combination with the control electronics to do variable speed. Table saws don't need that as they're using fixed speed to match fixed diameter blades (and undersized blades are dangerous).

Another factor may be that professional table saws tend to be large and heavy to the point that they're soft start through sheer inertia/ momentum - still if it makes some users happy - then why not fit it I suppose.

Reply to
dom

Isn't it more due to the induction motors used on "better" saws, which are inherently soft-start.

Reply to
Reentrant

I thought the issue was that a hard start on a 1400W motor is likely to blow a 13A fuse...

Reply to
The Natural Philosopher

Indeed, apart from the extra noise, there is no real requirement for soft start on a table saw - its not going to jolt it out of position.

Not on a universal motor... (my 9" grinder is a 2kW univeral motor and that has no trouble with fuses - now that would benefit from soft start as it has a hell of a kick though)

Reply to
John Rumm

I doubt it, the start up surge won't be long enough to blow the fuse, it needs a lot more than 13 amps for several seconds to blow a 13 amp fuse.

Reply to
tinnews

Simplest softstart is a series filament lamp plus a switch to short it. A 1kw halogen lamp would do.

I'm sure the majority of buyers prefer a coiuple of quid off than soft start.

NT

Reply to
meow2222

[What is the convention here: reply above or below preceeding poster ?]

Just for clarification: I have not had any problems with fuses blowing. This is Belgium, we don't have fused plugs; everything is spur-wired back to the fuse per circuit CU. Banana-republic ? ? ? The idea is not to control the speed as per a var. speed router. I just don't like the starting clonk it makes, (just like John R's grinder)

I had considered a hardware solution which you switch in and out manually, like the halogen lamp. Any other loads that are suitable ? Or a pointer to an electronic solution ? Thanks.

Reply to
Rob

poster ?]

either below or inline. You can do as you wish, but this is what works well.

a plug-in heater is another favourite.

I can't see it being worth it. Variacs are another old fashioned option, but again not worth the expense.

NT

Reply to
meow2222

It's called an induction motor! That "chunk" is just the cost of building 2hp saws around cheap universal motors.

I suggest ear defenders, then finding space for a big old cast-iron something off eBay.

Reply to
Andy Dingley

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