Thread: 240v single phase to 415v 3 phase conversion

Could tha L & H switch indicate a slow and fast feed screw? maybe there is a fast saddle drive with a separate motor or something?

The plate on the rear of the lathe lists only the drive motor and coolant motor hp rating and a total which adds up. There is space for an aux motor but nothing stamped in it.

Attachment 213941

Attachment 213942

These 2 pics cover everything on the gear control panels. The control in the centre of the top pic also has me puzzled. The pic of the switches covers everything visible except for an added emergency stop button to the left which also has a green button next to it and another green button which I think is the original start button on the far right of the panel. Unfortunately the area in between is blocked by a chuck guard mount setup which was added recently. I have to have a better look behind it tommorrow.

Dean

Originally Posted by Stustoys

Hi Big Shed,
Thanks. I remembered the post but didnt think I had a chance of finding it(tI thought it was in another thread, not that we do that sort of thing around here ). It confirms(I'm pretty sure) that I've picked the correct ones, I need something to pad the order up to $20 altronics min)

Stuart

Hi Stuart,

I installed the 10k pot switch from Altronics. Changed pd2 to 1, changed the jumper to 2-3 and I can only go upto 25Hz max by using the knob.

I assume its run over that without the pot and you havent changed any other settings.
Is in a lin or log pot?(though I'm not sure that would make a difference)
Do you have any other 10k pots?
There are other settings that may help but I've never used them and dont fully understand them, it should work as is.
Check PD070=0

Stuart

Hi Stuart,

I only changed pd2 to 1, switched back to "0" and it goes back to 50Hz.
I bought 3 of them and replaced with another one just in case but with the same result. Its linear pot as below.



Thanks
Trong

ps: I just check pd70 and its on "0"
->changed pd73 from "0" to "50" seems to fix it.

Well that stuffs up my next guess which was your soldering wasn't the best

Ok the next thing I would try is soldering leads to one of your spare pots and connecting them to the external terminal(you'll have to move the jump back) and see what you get. (do you know which wire goes where?)

Stuart

edit

Originally Posted by jackaroo

->changed pd73 from "0" to "50" seems to fix it.

Ummm ok... that was one of the ones I thought might have something to do with it but I'm yet to get my head around what they are for.

Speak too early. Changed pd73 to "50" makes the knob useless, it runs at 50Hz, regardless of where i set the knob

Changing pd72 to "0" (.ie lowest freq) and pd73 to "50" (highest freq) makes the max on the knob at 25Hz and min at 50Hz :P. I'll have to try again tonight.

Regards,
Trong

Trong my settings are
pd 03 main freq 50
pd 04 base freq 50
pd05 max freq 70
pd07 010 default
pd 11 min freq 5 ( should maybe be a bit higher )
pd72 upper anologue freq 70
pd73 lower anologue freq 5 could be a bit higher

pd 142 rated motor current set to max of rated vfd current
i set mine to 5 amps just to be on the safe side
hope this helps
check you have the pot wired correctly
john

Hi John,
I don't understand your setting "pd07 010 default"? Typo for 0.10 maybe?

Hard to wire it wrong when its mounted on the PCB.

Stuart

I had to mess around with PD72 on mine as well to set the range of the pot. Can't recall what I ended up with, but it had nothing to do with the frequecy of PD5 not what the motor maxed out to. I also found that only the forst half of the pot changed the frequency, the second half of the turn makes no difference. I'm wondering if the pot should be 5kOhm?
Joe

Hi Joe,
10K is the correct pot.
I havent used these VSDs with a pot. I'll got have a quick play and see what I get.

Stuart

Ok with an external pot mine works just as expected once PD072 is set to something move liveable for my poor old Hercus. i.e.50(as the manual says it default) not 400 as it came from the factory.

So if you set PD072 to the same as PD005 you should be set. (though I must say I'm a little surprised the pot can override the PD005 setting? maybe it cant.........back out to the shed lol)

Stuart

Edit, turns out PD005 was set at 400 so things were working as they should. working fine using full travel of pot now with PD072 and PD005 set at 50. Whats your min speed Joe? maybe that has something to do with it?

Stuart,
might be: my min speed is 0 and my max is 100Hz....
Joe

Eleven unrelated posts in a row. Is this what is meant by hyjacking a thread? LOL.

Dean