VFD Inverter Drive & New 3 Phase Motor For My Myford ML7 Lathe

got this new three payers inverter to do a bit of a review on and I've just bought this three-phase dual voltage motor off of ebay and this is a one horsepower model the inverter is 220 volt input and it's connected to the motor 220 volt Delta connection method and I'm gonna be using this setup on my my friend ml7 I'm replacing the actual single-phase motor which I had forward and reverse on that was a good motor but three-phase is obviously better in a number of ways and I want the option of variable speed and all the other things that go with VFDs so the inverter has the same electronics as the one I got my um chinese mini lathe it's the x sy - 81 and the only real difference is that the electronic throg 50 housed in this different box and the connection block is on the lower side here and rather than the upper side on the other one and this one has a screw on cover and it's all dead easy to um connect up the wires go through the ports at the bottom here onto screw terminals and it's clearly marked with a sticker on the underside here plus it comes with them very clear and easy to read operating instructions you have this some paper here which folds out both sides with them tables drawings and instructions on how to actually why the VFD up set up the parameters and also set up the block here for external controls on a control box or button system that you may like to add at a later day and that's something that I will be doing early today both on the Chinese mini lathe and the my effort here I've got these really nice momentary push buttons which I bought from eBay and I've got some coming from Bangor as well and very well made they're actually made of metal with the switch mechanism on the back here and it's some 22 millimeter cut out for these to be fitted into so that's going to be a very good project when I get around to it so the build of the actual construction of the VFD is very good it's a good solid ABS plastic on the back here we have the cooling aluminium fin section and two computer type fans which draw air through that to actually take off the heat from the VFD and that's something I really like about this one every now and again these some fans will need cleaning from dust to be surprised at how much dust they actually pick up in the workshop environment and also in these fins it needs to be brushed out at some point so it's basically just a case of taking the BFD off of wherever you've melted it with four screws and then you can actually brush an airline all this out so bank would do various models of this type of inverter and it's very important to choose the one that you need the eighty one like I say is the 220 for input and 224 out per three phase connection Delta and then you've got installation for the other 82 and 83 some which obviously you're not going to use so it's basically this one here for basic operation wiring diagram and that's what I'm going to be using and for anyone that's infested this is the label on my motor and when I put this motor on my Chinese mini lathe I had the electronic connection box at the top here there's a very good motor to get very versatile because you've got the mounting positions in three different places so you can have this actual wiring box either at the back here like I've got it now on the top or on the other side this is the Chinese mini lathes one I'm like I showed in the other video so to actually change the position of that actual wiring box is not the actual box that comes off it's the mounting fee which actually screw onto these some spare positions so it's basically take off both those brackets on the underside here there's one either side I'm using those um four Allen bolts two on each and then you can over here screw it onto all the brackets on to what side you like if you would use this top side here with the label on you can actually unscrew the label and remount it in any of the other positions so that label is always um visible so when you buy this motor new you'll find it's normally got the wiring box on the top so I've had to reposition those and mounting brackets at this at the back here for the Moffat ml7 plus when I got the motor is set up in star connection and that's with these metal links here I'm going across these three connections here if you get a new motor to the third metal connector is normally hidden under the other two which connect these three so basically you just take these nuts off here take off these links and like I say there be three and you join them then in this method going across the terminals here and that's Delta Connection [Music] and it specifies some in the instructions on this some VFD that it must be connected in Delta connection for the setup it will still work in the star connection and it won't do any damage but the correct orientation is Delta and if you do buy a second hand and three-phase motor that set in the star position and when you take those nuts off you only have two links it's very easy just to make up the third link using a piece of brass or thin steel play and connecting all three in this method so like I said it's very easy to actually um connect up this some VFD you have the earth live 220 volt in neutral 220 volt in and then the WV u which connect up to the corresponding motor connections and just remember both the mains input earth and the three-phase motor wiring an output earth connect to the same terminal on the end here so both the VFD and the actual motor are earth to this terminal so you obviously have to buy three-phase cable for this sum motor and I bought cable rated at 16 amps so the young three-phase cable has some three different colors like a gray black and brown and then you have the earth wire so there's four actual wires within that cable and I actually found it um better cost on eBay to actually buy a extension cable three-phased extension cable and cut that one up rather than buying it by the meter so the W of the new wires connect up to the WV u input on the actual terminal block there and on my other inverter on the Chinese mini lathes when I am did it in that correct orientation the motor ran clockwise I found with this one when I connected art exactly to the lettering on the actual motor this one actually ran in anti-clockwise when the VFD was set in the forward position but if that happens and don't worry about it it's very easy to correct that and all you do is swap around any two of the input wires coming in any two terminals to swap those around and the motor will run in the opposite direction so I just swapped these two wires here over and that was some correct then so that's the connection box cover replaced with its rubber seal and the motors now ready to fire up one thing I really like about these modern three-phase motors is that the actual motor is a completely sealed unit there's no open end to the windings or electronics the fan literally just pulls the air through the cover here and the air goes through the fins that surround the motor and keep it cold and there's no way that swarf or dirt can actually get into the electronics or windings so it's a really great motor and you can see why um people choose a three-phase not only are they great for all the other benefits but they're great being totally enclosed and can be used in a dirty environment soft connected the maned plug and switch the inverter on and on camera the digital display shows up as flickering but I can assure you off-camera it's dead still and one thing I do before I start using any equipment like this in the workshop I always save the original instructions copy there and save it onto my M computers and then I am print our cards in a4 faith in card use these as the working copy in the workshop then you've got the instructions safe and it doesn't matter if these get dirty or whatever so on the operating panel you have stop and reset run you have the speed control Fortin reverse a display button when the VFD is in the stopped mode you can actually press this display button here and that becomes a jog button so it actually jogs the motor in a very slow revs you can actually set the parameters for that as well how fast it goes in that jog mode and you can jog it in forward and reverse so that's very handy and then you have the programming mode for programming the parameters and the function data button and that's the Save button as well the control panel can be removed from the VFD by this tab here push that one in and lift it up and it comes out on a cable right there I presume that you can actually get longer cables for this so you can actually use the panel away from the VFD in another position I'm not going to do that because I'm going to obviously make up another control panel with those buttons on that showed earlier and use it like that and that saves them the actual control panel on the VFD from getting worn out so straight out of the box you could actually um why this up and test yeah um and I know for a fact that this isn't actually set for this particular motor but it won't harm it so I'm gonna turn on now just to show you [Music] [Music] but it is actually worth um going through the parameters first just to see that the inverter is actually set to the actual motor that you've got connected to it this one's our 1,400 rpm and it's 4-pole so now I'm going to go into the parameters and change this one over to 4-pole and this is referring obviously to the magnetic setup of the motor and so firstly I look up on the chart there's many different parameters on here I look up at P 25 so that parameter 25 which is the motor series selection is got zero for two poles one for quadrupole and two for sec to fall so it's actually giving you the option for two pole magnets for poor magnets or six pole magnets so firstly I press programming and I want to go to p 25 the quick way to do it is this I'll go up to 5 and press the display on it I'll take it to the next digit and press out to 2 so it's a parameter 25 and then you press the function data to see what the data is for that actual parameter and it's set at 0 so that's wrong for this motor that's for two poles we want to go to quadrupole which is four so then I jog this one up to one and that's on four pole mag map and press the function data again and that enters that amount and now it goes to the next parameter which is 26 which is the working frequency if I press the function date on that it's 50 which is correct for this motor as well when you've done all the parameters that you want to change or set all those checked and set them when you want to get out of the programming and mode again you just press programming and it's back in the position for running and I showed it on the mini lathe inverter motor setup where I actually set the parameter for the jog speed of the motor and like I say when it's in the off position you can press the display here and that will actually jog the motor you can hear the fan come on and the motor will turn at a slow speed or whatever speed you've set it to run out and you can press the forward reverse and it's gone into reverse there and drop that one again back into Ford and it's ready to run again and it's totally amazing the amount of different things you can actually do with the motor you can change the velocity descent velocity you can change the actual torque you can change all different speed ranges for which you want the motor to actually start off in and how fast it speeds up how fast it slows down you've got brakes there's so many different things it's a very interesting and really worth actually studying to see what you can actually do and when you come over to connecting and push buttons and other things to the actual low voltage um block that I showed you there the green one that's low voltage you can look on here and p50 gives you the options for changing over to wire control stop or keying stop keying operations and stop here so it's um actually gives you the options on the parameters for setting up these buttons and whatever you using on air and that's another thing I've ordered our own speed control potentiometer um for external use from banggood and I'll show all these things in various videos if I get time another important thing to remember with inverters is that they do hold power even when they've been disconnected from the mains and some of them have a warning on the front here to wait a certain period of time after disconnection before you mess about with any of the electronics and what I do with this one here I turn off at the wall and wait for the display to go off and that's probably up to a minute before I know that it's safe to work on and I am going to use my excellent labeling machine to actually put a warning on this one for anyone after I'm gone also I forgot to mention earlier that the actual motor comes with a nice booklet which explains all the connections or whatever um so that's really good and on the my fat ml seven and I have taken off the old or the it was a new single-phase motor ahead I've only had it about a year with a reversing system I've taken that one off and I've made some heavy-duty steel rails to actually move the motor forward a bit so that I can actually get the pulleys in line and on the actual lathe I'm not going to have the VFD mounted on the lathe at or or below I've made a panel above the lathe um so it's really handy to access and I'll be screwing the actual VFD on to that one and on the actual pulley I'm using this some tape tape a lock pulley I'm one of the best pulley systems I've ever seen I never knew they existed until a few weeks ago when I did the Chinese mini lathe the actual way it works you've got these um - Allen grub screws which lock it all together when it's in position if you want to actually take it off from the motor you take those two out and then you screw one of them and back in the top hole here and that will actually release the pulley from the taper on the larger ones you have to use quite a bit of force that's clicked now so that's come off and then the whole assembly will come off on the actual spindle there you might have to use a screwdriver just to prise the taper power open up there and before actually slide off so it's a really a good thing to have them you get these in all different sizes for all the ranges of pulleys this one's nineteen millimeter with the wood rough key so they actually melt on that one one very important thing to remember if you're using these um tape a lot pulleys with the taper you've got to obviously melt here and first there's only one way it can go around to get their holes aligned and you can't put it in a wrong position if you don't mean so that's it there and then I put the grub screws in first and just lightly and do those up so the taper doesn't fall out and then you slide it onto the shaft like that so it goes over the wood rough key now it's really important here not many people mention this but in the instructions it clearly says that you must have a gap between the top of the key here and the actual taper assembly as long as there's a gap there it's right and that's so that when you tighten these two up and rock it onto the actual shaft if there wasn't a gap there the force can actually crack the tape apart so that's worth remembering all as you do is get it into position like this and then tighten the grub screws down and that pulls the pulley onto the taper and the taper is compressed on the gap here and it actually locks onto the spindle and I think there's some torque settings for these um actual grub screws but I just do them up nice and evenly quite tight and that won't move at all and it's ready to go and there are very low cost for what they are solid cast iron I bought mine on eBay and they're all standard size or standard fitting um they have the numbers on I can give the numbers for this one for the taper and for the actual pulley and like I say that taper there we'll do a range of pulleys and the great thing is is once you've got the center part if you want to change the size of them police you just buy the pulley to actually fit that taper again and it'll go up to a certain size before it changes over to the next size taper so I fully recommend this inverter three-phase inverter from banggood I think it's well-made it's a very low cost for what it is and it's um very reliable I'm really pleased were there and I've learnt so much about inverters and three-phase motors and that in the last few weeks has been very interesting I love learning new things and it makes some life really worth while and being practical and doing this sort of stuff and in my next video I hope to show this all set up on my old my fat ml7 and in operation

Channel: Steve Jordan

Views: 212,782

Rating: 4.6869369 out of 5

Keywords: Myford ML7 VFD, Myford 3 phase motor, Myford ml7 upgrade, myford motor, setting a vfd inverter, program a vfd inverter, vfd setting, vfd programing, myford variable speed, myford lathes, banggood inverter review, banggood vfd, at1-xsy inverter, chinese inverter, vfd operating instructions, vfd control panel, ml7 lathe, myford super seven, taper lock pulley, taperlock pulley, myford pulley, myford ml7

Id: bmHRD_KJNfw

Length: 25min 51sec (1551 seconds)

Published: Wed Jun 20 2018