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VFD/Lathe fault

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Ron Laden09/07/2020 12:50:43
1972 forum posts
391 photos


The cause was almost certainly the ground wire losing connection to the speed pot in the remote control or at least thats what the technical guy suggested, he thought it had upset the VFD in some way. As Stuart suggested I did switch the control back to the VFD which by passed the remote and its pot but the exact same problem was still there which proves the problem lie in the VFD at that point as I had already reconnected the ground to the pot.

The tech guy said we could go through all the settings to see if he could find the fault but it was too long winded over the phone so it was much quicker to take all the settings back to their defaults and go from there.

The only settings I had to change back from the defaults was the bottom end frequency, acceleration/deceleration times and change the motor control back to the remote.




Edited By Ron Laden on 09/07/2020 13:00:47

Ron Laden09/07/2020 13:51:06
1972 forum posts
391 photos
Posted by john fletcher 1 on 09/07/2020 12:20:28:

Hello Ron, is it possible for you to post a copy of the email from transwave here for other person possible use in the future, one never knows. John

I can do John but do you have a Jaguar Cub and the Transwave remote control station, I know the various makes of VFD,s are similar but do they have different code references..? as what I have applies to the Cub.


john fletcher 109/07/2020 15:26:49
603 forum posts

No i haven't a Jaguar cub but I have made a MOTOR folder / book for club members, as a reference for when I expire. I thought if I had a copy of Jaguar cub I would add it to the folder ,thinking it might be useful to a member in the future.

Several years ago I bought a pre owned Omeron inverter at an auto jumble sale, the seller said it worked all OK. But when wanted speed control it wouldn't, After doing every thing I could think of,I phone Omeron,, their technical support, man was so very helpful. I was too quick using the push buttons, he said, press and pause and when I did, press and pause, every thing worked. I was very grateful / happy. John

Ron Laden09/07/2020 16:00:42
1972 forum posts
391 photos

Hi John,

Please see below the instruction for the connecting and setting of the Jaguar Cub VFD which is what Transwave supply with the Cub, also see the earlier picture of the remote control station which is a Transwave product.

The first two sheets cover the connecting up and basic settings of the VFD.



The next sheet describes how to clear the VFD and take it back to all the factory default settings.


The next sheet describe how to pass the motor control over to the remote control station/pendent.


The final sheet shows the wiring for the remote to the VFD, note that on the sheet describing how to set the VFD back to its default settings it says to disconnect all of the remote cables. There is no need to do that, just disconnect the single pink cable (seen in picture) which will isolate the remote.


Hope this is useful


Edited By Ron Laden on 09/07/2020 16:01:55

Clive Foster09/07/2020 16:36:48
2252 forum posts
76 photos

I don't think the VFD makers have really come to terms with the way falling prices and greater internal "intelligence" have made installing smaller VFDs practical for folk with little specialist experience. Installation followed by a few simple steps to get it working being one thing. Sorting an issue if it either doesn't work initially or stops doing what its supposed to do later being a horse of wholly different colour.

One reason why I tend to steer folk towards the Eaton DE-1 "smarter replacement for an ordinary contactor" devices is that there is essentially no scope for misguided finger-poking to mess things up. Which seriously cuts down on the help calls from folk who can't leave well enough alone. People who do know what they are doing generally don't ask, or need to ask, me in the first place.

It would be nice to have a printable form with all the default settings and what they actually do listed with spaces alongside to fill in any changed values and what the changes do. Nicer still would be an online version where you can fill in the parameter values you have set that automatically fills in the effects. Neatly printed out is always more readable than hand annotated scrawl, especially mine, and automatically generating the effects provides some protection from fat finger issues when changing parameters. If such a form were available, or a home made substitute produced, laminating it for protection so it could be kept with the VFD seems useful.

The ideal would be some sort of interrogation system able to read off the parameters actually set and flag up anything thats wrong. But I can't see that happening.


fastdave09/07/2020 17:05:45
28 forum posts

'have made installing smaller VFDs practical for folk with little specialist experience'

Don't mean to sound elitist, but that's why we have 'qualified' electricians. I went to work as a leader in a multi skilled taskforce for one of the Diagio outfits. I found quickly that electrical craftsmen moved quickly from one discipline to another, but mostly the mechanical guys had an inherent fear of what they couldn't see.

Healthy fear in my eyes - I have had brain jolting shocks, mostly from others carelessness, the worst being a factory foreman who came in and switched all of the machinery on to start the day, whilst I had a 'DO NOT TOUCH' notice pinned right in front of him - I got such a belt from 440V that I shouted out - very loud - involuntarily - yes, lucky me - I didn't die!

But let us not stop there, for have we not given the village idiot mobility, issuing driving licences willy nilly - most people could not tell you what the highway code is, never mind individual parking rules - but you're right, I digress - the point is that all of these devices have manuals with pages of health and safety and restrictions, before the technical stuff starts - electricity is not measured in thousandths of inches or millimetres - it is a silent invisible killer.

Dave, (I'm sorry to bring this up after such a happy ending), Fife.

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