Jaycar RC Thanks SeanB, I wasn't too sure and as you can see from the blast foot print she must have gone off with a bang, it's all ready to be hopefully fixed and reassembled then tested on the bench but I first need to put together a protection box with breakers. Many Thanks Muttley Here's the full manual for the unit that I have. If you have any spare VFD's you could post them to me to use. Just repaired one at work, replacing the horrid little push switches on the control panel.
Must remember to order some new ones, I used ones from an old monitor as they were about the right size. I do see quite a few but never bothered with them before and need to learn a bit about them, this should be a good first unit for testing providing nothing else was affected, just hope that I haven't wasted my money Pages: [ 1 ] Go Up. There was an error while thanking. Now for those of us with lathes we like to control them from the lathe apron. Wire one wire from one side of the switch on the apron to the forward position on external control terminal on VFD.
Then wire the other side of the switch on the apron reverse position to the external control terminal on VFD. Then wire the common of the switch on the apron to the common position on the VFD. There are directions with each VFD that show the wiring contacts for each wire position. Once you have wired the external switch on the lathe into the VFD you must go into the VFD programing and tell the VFD to except control from the external apron switch.
Look in your VFD manual it will tell you how to do this. Also wire in a E-stop to remove power from everything. This is the row switches on the box to the right of VFD box in video. Using the terminal blocks make connecting the wires from each unit easier. I have one on the box to the right however it is not currently wired into the VFD one must leave something to be done Hope this does help.
PM me if you have question I will try and Help. I think the code says, as long as the receptacle is visible from the operator, that qualifies as a disconnect. There really does need to be an overcurrent protection device, like a fuse. Also be sure it's a volt drive before connecting it to a volt receptacle. Teco makes in, out drives as well.
Yep Barry you are correct in reading the manual, however I find that if explained in the simplest form first people tend to catch on quicker. The correct circuit breaker read what your VFD requires in the electrical sub box or supply box is protection enough for the VFD.
The VFD itself will protect the motor. Now I am not saying if one so inclined has to wire circuit with another I believe Jim you are correct in that if the plug is visible to the operator that may serve as a disconnect, need to read the code book again.
Just trying to help. Over 2 HP, no. Breaker amperage to be installed, depends on the VFD manual instructions. It has a tab to allow lockout of breaker. Mine is plugged into a receptacle so I can move mill around , I still have a plug within sight that qualifies as a disconnect. Breakers are not to be used a switches, unless rated for switching duty. I am retrofitting all my machines with such switches, even of they were equipped with magnetic motor starters and "three-wire control stations", either line-voltage or low-voltage usually 24 volts , for safety purposes.
Several of my machines exceed 2 HP, so those safety switches allow for complete interruption of all machine power, after which the cordset, occasionally 50 A or 60 A, can be disconnected with no load.
NEVER, ever. Indeed, most such feeders were provided with MCCBs as their disconnect. NEVER intended to be a disconnect. You cannot cook the VFD, if they brake at a rate that exceeds the ability to dissipate the regenerative voltage, then the VFD will trip free run and you will get an over voltage error. You do not want this to occur, no braking will be applied if this error occurs. Still, you should set your braking speed at not less than 1 second.
The manual is clear as mud on FF I would add the braking resistor and change F2 and see how it does. You may be able to tweak FF17 as follows, but I have not tried these on a Teco. Thanks, mksj! I tried setting the decel time to 1 second, then 0. It's really impressive to see the lathe chuck stop so fast. No problems, even stopping from full speed. Guess I won't need to mess with F You must log in or register to reply here.
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