Thanks for the video. I was looking to see if these cheep VFDs will last, but you can’t complain about getting 5 years out of it. I would be interested to see if people over size the VFD also. I have a 5hp compressor and thinking about getting a 7.5 VFD to hopefully make it last longer. I would be interested if anyone has info on that.
If the max frequency is 50 Hz it looks like you still have it set up for 50Hz. US power is 60 Hz, I've read/heard that running 60Hz motors at 50Hz causes them to overheat and loss of torque. There should be a way to re-program the VFD for 60Hz.
Ya know, I don't know if I buy into that whole if you have more than one machine a rotary is the way to go. I just don't like listening to the damn things. I would say if you are going to run more than one machine at a time, the rotary is probably the way to go. I have a mill, lathe, surface grinder and just bought my 4th VFD for a 3phase 10hp electric motor driving a hydraulic pump for a lift. VFD's are cheap as chips these days and dead silent. I don't even use all the features my vfd's allow. I buy them from scamazon or fleabay. I set them all to 60hz and never touch them again. Even my 2speed motor on my lathe works just fine. I have yet to stall. You're mill is variable speed like my bridgeport, so again, set it to 60 and forget it. The legacy controls work just fine. I put a switch in front of every VFD I own, I don't trust the chinese and I also don't want them getting spiked or blown out from power spikes or lightning. VFD's are the only way to go when ya can't get 3phase.
as far as noise is concerned a rotary phase converter (rpc) only has the noise of a running motor. it can also be placed far enough away that you can not hear it run at the expense of needing larger wires for distance. typically the machine you are running will generate more noise than the rpc itself so its really a moot point. noise pollution is just something typical to machine shops. vfds also introduce their own noise from the motor which sounds like coil whine and is high pitched. if anything, it is far more troublesome to listen to then the generally low pitched sound of an rpc running. as far as the comment on if you have multiple machines then an rpc is ideal is concerned then it is true. provided you are buying half decent vfds the cost for more than a few of them often equals what you would put out for an rpc. not to mention you could build your own rpc for the same cost as a mid level vfd. also the fact that you can run multiple devices at once on an rpc comes into play and that you can leave controls alone. when using a vfd generally all controls need to be either replaced or rewired such as your fwd/rev, e-stop, on/off, etc
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Thanks for the video. I was looking to see if these cheep VFDs will last, but you can’t complain about getting 5 years out of it. I would be interested to see if people over size the VFD also. I have a 5hp compressor and thinking about getting a 7.5 VFD to hopefully make it last longer. I would be interested if anyone has info on that.
Same I was worried about getting the cheap one.lol sounds good to me.
If the max frequency is 50 Hz it looks like you still have it set up for 50Hz. US power is 60 Hz, I've read/heard that running 60Hz motors at 50Hz causes them to overheat and loss of torque. There should be a way to re-program the VFD for 60Hz.
Ya know, I don't know if I buy into that whole if you have more than one machine a rotary is the way to go. I just don't like listening to the damn things. I would say if you are going to run more than one machine at a time, the rotary is probably the way to go. I have a mill, lathe, surface grinder and just bought my 4th VFD for a 3phase 10hp electric motor driving a hydraulic pump for a lift. VFD's are cheap as chips these days and dead silent. I don't even use all the features my vfd's allow. I buy them from scamazon or fleabay. I set them all to 60hz and never touch them again. Even my 2speed motor on my lathe works just fine. I have yet to stall. You're mill is variable speed like my bridgeport, so again, set it to 60 and forget it. The legacy controls work just fine. I put a switch in front of every VFD I own, I don't trust the chinese and I also don't want them getting spiked or blown out from power spikes or lightning. VFD's are the only way to go when ya can't get 3phase.
as far as noise is concerned a rotary phase converter (rpc) only has the noise of a running motor. it can also be placed far enough away that you can not hear it run at the expense of needing larger wires for distance. typically the machine you are running will generate more noise than the rpc itself so its really a moot point. noise pollution is just something typical to machine shops. vfds also introduce their own noise from the motor which sounds like coil whine and is high pitched. if anything, it is far more troublesome to listen to then the generally low pitched sound of an rpc running. as far as the comment on if you have multiple machines then an rpc is ideal is concerned then it is true. provided you are buying half decent vfds the cost for more than a few of them often equals what you would put out for an rpc. not to mention you could build your own rpc for the same cost as a mid level vfd. also the fact that you can run multiple devices at once on an rpc comes into play and that you can leave controls alone. when using a vfd generally all controls need to be either replaced or rewired such as your fwd/rev, e-stop, on/off, etc
That quill doesn’t sound happy