For the overheat alarm put a fan blowing on the regen resistors on top of the control cabinet.
On the machine with the low voltage alarm trying reducing the maximum spindle acceleration. There is parameter for this which is set at 195 out of the factory. Reduce it to 150 or so, the spindle will take a bit longer to get up to speed.
You might also check the size of the wire to the machine. I think the SL30 needs a 100 amp service; look at the rating on the back it will give maximum amps. This needs a hefty cable on the supply, 0 gauge or even double 0 and a lot of places cheap out and just use the smallest cable size to meet code. If the cable run is long you might be getting line drop.
Similarly check the transformer size. To supply the starting surge without dropping the voltage too much you need a transformer rated at least 50% greater than the machine's power draw; I like to go double.
If you are running several machines from the same transformer you can sometimes get two of them happen to pull maximum spindle acceleration at the same time especially running G96. This pulls the voltage down and one machine will drop out.  |