We need to become very good at this .
Anyone had any experience?
Here’s a well-documented off-the-shelf one. £450 to brake a 4kW motor (ie the table saw)
http://uk.rs-online.com/web/p/brake-modules/4477404/
Full technical manual: http://docs-europe.electrocomponents.com/webdocs/12a9/0900766b812a92b2.pdf
The actual braking module is considerably cheaper (£150) but all the surrounding circuitry must be supplied.
1 Like
It all looks pretty simple stuff
I think we can find a much cheaper way to do this with a 555 and a transformer
@adamjpage do you have any big transforms and interlocking contactors ,boxis etc in the back of your shed? So we can do some experiments without spending a fortune I have some of the bis in my junk box but not all
Me and Stefano have ordered Dom contacters from eBay so we can make a start
Which ones?
To repairs the dc brake
Don’t order contactors yet as I have been reading about it and it’s getting complex just the relays as we understand them
Fancy!
Kind Regards
Tom Lynch
It should work and hopefully it’s spec is for run jog so it will be able to take the saw but if not it will do do other tools
The contactors are hear and I have found some big SCR’s for so with a little bit of careful thinking we should hit the £30 a break target.
I’m a little concerned about the difference in price between the commercial units at £450 and the homebrew solution at £30. What do the commercial units do that the homebrew doesn’t?
1 Like
Someone on eBay who did not know want their boxed new contactors were worth and the parts from my scrap bin.
Still looking for the overload relays
Note ours will be significantly bigger and heavy
Transformer based systems are the way it was done a few years ago and still will work just as well