- Thread starter @Turbo
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madkayaker
Pro sparkey Pro Welder
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Yes due to inherent high inertia in equipment if you try to get the 4sec stop time things break! The run down time needs to be same as run up time
Yes, the enormous cost!
I looked into commercial DC Braking units for a large combination woodworking machine I have (Dominion Super Elliot). It has three motors, two at 7.5 Kw and one at 5.0Kw. It was going to cost £600 per motor plus the iniquitous VAT. I ended up designing and making my own, which cost probably £350 overall. To do it reliably and safely you need some careful timing between taking the power off the motor, and applying the DC, with interlinks to stop a 'start' command while it is still braking.
I looked into commercial DC Braking units for a large combination woodworking machine I have (Dominion Super Elliot). It has three motors, two at 7.5 Kw and one at 5.0Kw. It was going to cost £600 per motor plus the iniquitous VAT. I ended up designing and making my own, which cost probably £350 overall. To do it reliably and safely you need some careful timing between taking the power off the motor, and applying the DC, with interlinks to stop a 'start' command while it is still braking.
The regulations known as Puwer98 were introduced in 98 (surprise surprise!)
This was when brakes were required. We had to test all the machines at the college & all had to stop with 10 secs. An Arboga mill failed plus a Startrite bandsaw. We got a price to fit a brake to the Startrite & at the time it was £850, I ended up with both of them and dont worry about the lack of brakes.
This was when brakes were required. We had to test all the machines at the college & all had to stop with 10 secs. An Arboga mill failed plus a Startrite bandsaw. We got a price to fit a brake to the Startrite & at the time it was £850, I ended up with both of them and dont worry about the lack of brakes.
