If doable I’d rather up my transformer or get a transformer designed for VFD’s before I touch any of the factory controls. Only reason I went with VFD’s to power my equipment is due to space limitations, price, and two machines on different 3 phase power. Don’t have any desire to use any controls that are not on the machines.
Due to space limitations that isn’t an option.
Kinda what I thought as well. Had a parts company find me an exact replacement transformer. Was thinking about swapping them and putting a fan and closely monitoring. As mentioned before the current transformer was experiencing heat with prior owners from looking at the pre wiring pictures. So maybe a brand new one that didn’t come “pre-heated” will tell a different story?
Absolutely. You could wire it into the input of the VFD if you’d like. Currently your transformer input is wired into the 1&2 (200V) taps. What is your actual input voltage? If much higher you might consider using taps 1&3 (230V). The following shows the two input leads to the transformer circled.
I suppose it could catch fire. My bet is if it failed one of the winding's will short from the heat (insulation breakdown) ultimately resulting in an open winding and that would be that. Might blow one of the fuses too if when it shorts. In my experience when a transformer winding fails nothing downstream fails. There's just no voltage to run the circuit anymore. What is sort of telling though is that some of the worst looking wires on some of the taps are not being used which suggests they are just being cooking due to heat coming off the laminated core. Maybe all he needs to prolong it's life is adding a previously suggested fan to cool it.
It looks like a dry transformer, so I doubt there would be much of a fire. I guess there is a chance that the transformer primary(input) shorts to the secondary but I have never seen it happen.
For sure, I haven’t been getting any error codes at all on either of my vfds. Have one set up to run my Bridgeport J head and one set up to run this lathe. Both are set with the exact parameters each machine is wanting and also have kills programmed in with the VFDs.
I'd check that ground connection on x4 as well.is that the schematic for your machine?
Won't hurt to have a spare tx for down the road
It is the schematic for my machine. It’s just showing a 230v model. My lathe is a 200v motor with the nameplate asking for 208v.
