MattBot 0 Report post Posted September 10, 2018 Hello, I'm looking to automatically turn on a dust extractor when a table saw is powered, the table saw has a push button start so I can just use a switch to power them both. I'm thinking something along the lines of a box with a 2 plug sockets and a mains lead with a relay in-between. If this is a terrible idea could someone point me in a better direction? If a relay would work, could someone give me an idea of what relay I'd need? 0 Share this post Link to post Share on other sites
binky 860 Report post Posted September 10, 2018 is this domestic or more industrial scale? If domestic, you can buy hoovers with a socket to power the appliance. When you switch appliance on it turns the hoover on automatically 0 Share this post Link to post Share on other sites
Tony S 486 Report post Posted September 10, 2018 If industrial it is normal to start the dust extraction first. Personally I would use a vacuum switch in the saw start circuit. 0 Share this post Link to post Share on other sites
Sidewinder 2,118 Report post Posted September 10, 2018 Remember if it’s a place of work/business, then it must meet the Supply of Machiney Safety Regulations, which will require a lot more than just sticking a switch in! 0 Share this post Link to post Share on other sites
Geoff1946 43 Report post Posted September 11, 2018 I suspect from the original posting mentioning plugs, that this is a domestic, (DIY workshop) rather than an industrial set up. If that's correct then I recommend using a "shop-vac" type vacuum cleaner with a socket intended for this application. I have one which came from either Aldi or Lidl quite cheaply and is still good after being used and abused in my garage for several years. It has a current sensor relay within which "sees" the load of the saw being switched on and starts the vac motor. It also runs on for about half a minute or so after the saw is switched off. It probably isn't as good as a proper dust collector system, not least in terms of capacity, but I find it adequate for my limited use. 0 Share this post Link to post Share on other sites
roys 168 Report post Posted September 11, 2018 That reminds me, I must buy one of those wee vac systems for my wee workshop, not been to Aldi's for a while, will need to keep my eye on their web page to see when they have them back in. 0 Share this post Link to post Share on other sites
Andy™ 2,356 Report post Posted September 11, 2018 i just use the on/off switch on the dust extractor... turn that on before whatever im using then off afterwards 0 Share this post Link to post Share on other sites
