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- Feb 17, 2013
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I'm in the process of converting both my mill and lathe to 3 phase 1 ½ HP motors and Teco FM50 VFDs. Both machines are wired up, tested, and run successfully. I've left the decel time (F2) at the factory set 5 seconds, but would like to reduce it to near zero (safety, stopping the lathe quickly when threading to a shoulder, etc.) So I bought and wired in the specified (100 ohms, 150 watt) braking resistor on each of them.
Now I have some questions ...
(1) How do I let the FM50 know that I've added the resistor? There doesn't seem to be any function setting for this.
(2) How low can I set the decel time (F2) without cooking something?
(3) Do I need to adjust any/all of the F14 thru F17 parameters? The manual kinda describes the slowdown process, but I really don't understand what's going on here. Among other things, it mentions "DC braking starting frequency" (F16). Huh? I thought frequency had to do with AC, not DC????
Any and all insights would be greatly appreciated.
Now I have some questions ...
(1) How do I let the FM50 know that I've added the resistor? There doesn't seem to be any function setting for this.
(2) How low can I set the decel time (F2) without cooking something?
(3) Do I need to adjust any/all of the F14 thru F17 parameters? The manual kinda describes the slowdown process, but I really don't understand what's going on here. Among other things, it mentions "DC braking starting frequency" (F16). Huh? I thought frequency had to do with AC, not DC????
Any and all insights would be greatly appreciated.