so we have this brake here : it's a brake It was powered this way in the first place : schematics (Frein means brake in french) But it won't open.. We've tried with a lab power supply, with 24v going at 0.5 A, same thing there was before removing it from the machine. There is 45 ohms on the ends, so the coil should be alright? Also I have no idea what's that third cable entering on the top, the metal piece is not wired to anything, and the end of the cable wasn't wired neither. So is the magnet dead or is there something we're missing here?

Thanks for your answers.

  • \$\begingroup\$ Why did you apply 24 V when the schematic says you should be applying something like 48 V? (and about 1 A will flow thru you 45 coil) \$\endgroup\$ – D Duck Jan 8 at 9:03
  • \$\begingroup\$ So, you are applying 1/4 of the power that the brake expects... Give it 48V and 1A, fused of course, and see then... \$\endgroup\$ – Solar Mike Jan 8 at 9:31
  • \$\begingroup\$ The transformer outputs 48v but the ac to dc converter divides it by 2, and we did measured 24 v on the machine during first tests. The 1 amp is the breaker's limit ? \$\endgroup\$ – Ben Jan 8 at 9:34
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    \$\begingroup\$ Try it with the rotor in place! The gap without the rotor fitted is massive, so the force is small, put a steel disk in so that it mostly fills the gap and the forces will become much larger. \$\endgroup\$ – Dan Mills Jan 8 at 13:59
  • \$\begingroup\$ The ac to dc converter is a full wave rectifier bridge. It should output something like 48 V unless there is an open diode. I agree with Dan Mills, the rotor must be in place. \$\endgroup\$ – Charles Cowie Jan 8 at 14:34

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