Thread: Wiring external controls to Teco FM50

Hi Ken
Assuming I am looking at the right manual.
Is this your VSD?
http://igor.chudov.com/manuals/TECO-FM50-Manual.pdf

If you want it to run forward, connect 12V to FWD
If you want it to run backwards, connect 12V to REV
For speed control you need a 10kOhm pot connected to +10V,MVI,0V(the center pin of the pot goes to MVI, if you turn the pot and the speed goes the wrong way, swap +10V and 0V)

You then need to change the settings on the VSD

F_10=1
F_11=1

Hope this makes sense

Stuart

p.s. if you add the wiring but don't change the settings, the wiring wont do anything, maybe thats been your problem?

p.p.s. maybe the word "when" is better than "if"
When you want it to run forward, connect 12V to FWD
When you want it to run backwards, connect 12V to REV

Ken
Do you mean how to connect the lathe controls to the VSD?
Stuart

Ken,

If you refer back to this post, there's a sort of wiring diagram that may help.

https://www.woodworkforums.com/f65/wi...a-mill-132429/

The VFD is a Teco, but different model. I think the parameters are the same.

Ken

Wow. How good is that. So simple to do. I got bamboozled trying to understand the wiring diagram in the manual, which is probably 4 or 5 years old now. It did not simply show how to hook up for fwd, rev and speed control. I also had got onto Practical Machinist and tried to decipher a members wiring diagram, also to no avail. I had wasted hours trying to understand how to hook it up. One simply needs to ignore a number of terminals as you point out Stuart. The diagram suggested by Ken also helped. I have just looked up a later Teco manual. It actually seems to explain things a bit more and may have sufficed for a simpleton like me.
Whilst on the subject of VFD's, I haven't used shielded cable between the vfd and the motor. The radio doesn't like it at all. Is there a suitable multicored cable that one can purchase that will do away with all this interference. Any suggestions appreciated
Ken

Good to hear its up and running.
Can't help on the shielded cable..........put a CD on or maybe running the 3 phase in steel conduit would help?

Stuart

Originally Posted by Kentower

Wow. How good is that. So simple to do. I got bamboozled trying to understand the wiring diagram in the manual, which is probably 4 or 5 years old now. It did not simply show how to hook up for fwd, rev and speed control. I also had got onto Practical Machinist and tried to decipher a members wiring diagram, also to no avail. I had wasted hours trying to understand how to hook it up. One simply needs to ignore a number of terminals as you point out Stuart. The diagram suggested by Ken also helped. I have just looked up a later Teco manual. It actually seems to explain things a bit more and may have sufficed for a simpleton like me.
Whilst on the subject of VFD's, I haven't used shielded cable between the vfd and the motor. The radio doesn't like it at all. Is there a suitable multicored cable that one can purchase that will do away with all this interference. Any suggestions appreciated
Ken

Perhaps a filter...I have purchased a couple on ebay recently. Are your leads to the motor twisted? This helps to reduce the EMI. Otherwise, you might need to have a look at the possibility of an earth loop in your installation causing the interference*

*Not an electrician. But I do have a copy of "Volts for Dolts"

GQ,

Any chance of some enlightenment on the filter and it's placement in the circuit?
I have been informed by my wife that the radio just about shuts down when I'm running the FM50 driven mill.

BT

I have a Telemechanique filter (although its made by Schaffner as they mostly all seem to be) Got it for $19 ebay dollars. It has terminals for line-to-drive and drive-to-motor. I have a similar unit for my (uninstalled) servo drives but they are input only.

The filter complicates enclosure choices owing to their size. The Tele Mech unit is larger than even a 4 hp VFD box. My Deckel is going to need a hefty remote box to hold all the goodies...fuses, filters, drives, etc. Same for the lathe plus braking resistors and cooling for that application.

GQ

Hi Greg,

We had better talk at the next general meeting. My Drives Direct modified Teco VFD, has had the EMC sticker removed. This is contrary to their web site which states that their VFD's comply with EMC regulations. Maybe the sticker fell off during shipping?

Ken

It might be worthwhile for folks to have a look at what's available, and what other folks are finding. All of my filters are 415V input, so that won't work for the 240v guys. Maybe there's a simple solution?

I do know that you should twist the input wires to the VFD, and you should have a central earth point. Maybe Pete F who is almost an EE in his alternate career can chime in?*

*unlike me whose alternate career went away with the self-serve petrol station (unless you count hobby gynaecology.)

Hi Ken, Bob..

These problems can be tricky and expensive to resolve.. So the first question is how badly do you really want to fix it?

Is the station you are wanting to listen to FM or AM?, it's often easier to filter the higher FM frequencies, and by it's nature FM is generally less susceptible to interference than AM.

There are two ways the emi could be getting into your radio, one is via the mains, the other is radiated directly from the cabling to the motor or the VFD.

The Teco FM50 is designed to work with MSDF-2102 emi filter, check the FM50 manual for the correct model emi filter for your inverter. This is fitted between the inverter and the motor.

I'm planning on avoiding fully shielded cabling and just using regular orange circ, in an anaconda shielded conduit Product Range

Whichever way you do it, the shield has to be well bonded to earth. Which means a metal enclosure for the drive.

I'm pretty sure the FM50 has a emi filter on the mains input, if it doesn't the emi could be getting into the radio by radiating from the mains cabling..

Lot's of fun to be had for all..

Regards
Ray

Just to show how long its been since I've used a radio in the shed. Are we talking AM or FM? I'll fire mine up tomorrow and see what happens.
Stuart

Originally Posted by Greg Q

I do know that you should twist the input wires to the VFD, and you should have a central earth point. Maybe Pete F who is almost an EE in his alternate career can chime in?*

*unlike me whose alternate career went away with the self-serve petrol station (unless you count hobby gynaecology.)

I was going to comment on the twisting of the cables, when the hobby gynaecology comment derailed what I was thinking.....

Oh yes, I remember, twisting cabling is the technique for stopping interference getting into a balanced input, like audio, or RS485, won't do very much to stop emi radiating from the cables... hobby gynaecology, you say....

Regards
Ray

I was first alerted to this problem when I bought an Allen-Bradley servo and drive for peanuts on ebay here. The manual goes to great lengths to impress the user with the fact that the CE approval rating is only valid when the specified input filter is installed and Allen Bradley shielded cables are used from the drive to the servo.

While I have enjoyed a long career farting in the general direction of the European authorities, I tend to believe them in this case. So...filters, and shielding.