Page 2 of 2 FirstFirst 12
Results 16 to 28 of 28
  1. #16
    Join Date
    Aug 2019
    Location
    Nambour Queensland
    Age
    61
    Posts
    86

    Default

    I have a vfd on lone and I'll, start playing to see how things work soon. The motor is 2 speed and yes the low speed is half the high speed.1440 and 720. The picture didn't come out as clear as it should. Its also .75 and 1.5 so that must be kw and hp. Looks large for a not so big motor. I think its 380v and 2.82/ 3.48 which must be amps on the 2 windings.
    I was going to upgrade the house wiring to 3 phase but found out the metering change would be over a grand so that's out.
    Are The vfd outputs just wire up and no menu changes as I have no diagram to go by I am flying blind a bit.

  2. #17
    Join Date
    Nov 2017
    Location
    Geelong, Australia
    Age
    55
    Posts
    2,090

    Default

    You will almost certainly need to change some VFD parameters.
    At the very least you need to check them.
    Unless you can find a manual or at least a list of parameters youíre unlikely to have much success.

    Steve

  3. #18
    Join Date
    Aug 2019
    Location
    Nambour Queensland
    Age
    61
    Posts
    86

    Default

    I can see the light diming allready. The wiring and components are best removed and start again. So ill have to find some local help to overcome this upgrade.
    Many thanks for the info which will help me along.

  4. #19
    Join Date
    Sep 2012
    Location
    York, North Yorkshire UK
    Posts
    5,299

    Default

    Hi Brett,

    Observation and taking a few pictures will help when it comes to doing any work on the machine !

    But you do need to decide upon what you want to do and how you need to achieve it ! A VFD is the way to go, but the changeable parameters can be complex and confusing. You really need the manual for the VFD and a clear idea of what you want the VFD to do. In its simplest form it simply supplies power to the motor ! Then it is capable of varying the motor speed. Start with the basics and go from there.

    There are always people here that will advise and help you with things that are not clear.
    Best Regards:
    Baron J.

  5. #20
    Join Date
    Aug 2019
    Location
    Nambour Queensland
    Age
    61
    Posts
    86

    Default

    Before I let the smoke out which I have in the past can I get a clarification im on the right path. The 2 speed motor has 6 connection points 8 poles and 4. So using a vfd im going for high speed but not being familiar with motors im not sure what to connect to get delta And what happens with the remaining 3. The diagrams I've see don't help clear it up to avoid me having to buy another motor. Thanks.

  6. #21
    Join Date
    Dec 2011
    Location
    Sydney
    Posts
    465

    Default

    You are wise to be cautious.
    I suspect your 4/8 pole motor is a fairly rare beast; most pole changing motors seem to be 2/4 pole which at 50Hz that gives you speeds approx 2800/1400 rpm, and even those are not often seen.
    Bill
    Last edited by WCD; 3rd Mar 2021 at 04:17 PM. Reason: reworded

  7. #22
    Join Date
    Sep 2012
    Location
    York, North Yorkshire UK
    Posts
    5,299

    Default

    Quote Originally Posted by Hards2u View Post
    Before I let the smoke out which I have in the past can I get a clarification I'm on the right path. The 2 speed motor has 6 connection points 8 poles and 4. So using a vfd I'm going for high speed but not being familiar with motors im not sure what to connect to get delta And what happens with the remaining 3. The diagrams I've see don't help clear it up to avoid me having to buy another motor. Thanks.
    The connection points 801, 802 and 803 are I think the low speed don't connect any other points. The high speed is the other three connections 401, 402, 403. You only need three wires, ignore or remove the others.

    I've taken these numbers from the circuit diagram you posted.

    Good luck !
    Best Regards:
    Baron J.

  8. #23
    Join Date
    Aug 2019
    Location
    Nambour Queensland
    Age
    61
    Posts
    86

    Default

    Quote Originally Posted by BaronJ View Post
    The connection points 801, 802 and 803 are I think the low speed don't connect any other points. The high speed is the other three connections 401, 402, 403. You only need three wires, ignore or remove the others.

    I've taken these numbers from the circuit diagram you posted.

    Good luck !
    I tried belling them out and got a bit confused. My thoughts were an internal star point that would be needed to change to get the delta on the high speed poles available to connect to.
    Many thanks, I'm off to the shed to wire up and test now I have all the parts and info to get it running.
    Brett.

  9. #24
    Join Date
    Sep 2012
    Location
    York, North Yorkshire UK
    Posts
    5,299

    Default

    Hi Hards2u, Guys,

    The diagram shows the motor as a delta wired one !
    I don't see a star point.

    You will get similar resistances between the 801/2/3 points and the same between the 401/2/3 points. From a motor perspective they are two separate motors in the same frame.
    Best Regards:
    Baron J.

  10. #25
    Join Date
    Feb 2014
    Location
    Werribee, Melbourne
    Posts
    154

    Default

    Baron, sometime back I was looking into the original wiring set-up for my Hembrug that had a 3-speed motor fitted when new and that had a 'double-star' configuration for high speed.
    It was more complicated than this having a single star, delta and double star to get three speeds.

    However, this double speed set-up looks very similar and the 3 contacts on the left side of K13-30 that are shorted together look like they would provide a star point for a double-star set-up via 401, 402 & 403 by shorting 801, 802 & 803 together.

    The delta connection via 801, 802 & 803 would be the low speed as you have said but I think the high speed would need more than three wires just to 401, 402 & 403?

    I might be way off the mark but that 3-contact shorting arrangement looks suspicious to me.

    Ray

    PS - I couldn't remember the name but just dug up what I was looking at ages ago:https://en.wikipedia.org/wiki/Dahlan...changing_motor
    Last edited by Ray-s; 6th Mar 2021 at 11:07 PM. Reason: Added PS.

  11. #26
    Join Date
    Sep 2012
    Location
    York, North Yorkshire UK
    Posts
    5,299

    Default

    Hello Ray,

    I've just been back and looked at the wiring diagram again. I agree with you that set of connections swaps the motor connections 801/2/3 to star otherwise they are in delta. I must admit that I hadn't initially studied the wiring, I just looked at the motor.

    Very confusing the way its shown. I wonder if that is how they get the low speed for tapping and reversing.

    Thank you for pointing it out and for link

    https://en.wikipedia.org/wiki/Dahlan...changing_motor
    Best Regards:
    Baron J.

  12. #27
    Join Date
    Aug 2019
    Location
    Nambour Queensland
    Age
    61
    Posts
    86

    Default

    Well it seems things are not as easy as I would like. I did get the motor to turn using just the 3 terminals but the vfd has got me stumped so I have been researching how it is to be set. Its a very cheap and nasty chinese thing and I still haven't found a good info source.

    Sent from my SM-A515F using Tapatalk

  13. #28
    Join Date
    Sep 2012
    Location
    York, North Yorkshire UK
    Posts
    5,299

    Default

    Hi Ray,

    I've just found this diagram, it might help ! Its not for your mill but the info is useful.

    3hEV71T.jpg

    It gives the switch wiring and connections.
    Best Regards:
    Baron J.

Page 2 of 2 FirstFirst 12

Similar Threads

  1. Hercus mill manual
    By alfclp in forum THE HERCUS AREA
    Replies: 10
    Last Post: 6th Nov 2020, 10:52 AM
  2. Info on drill bits.
    By Axbrigade in forum METALWORK GENERAL
    Replies: 19
    Last Post: 28th Oct 2017, 11:11 AM
  3. drill sharpener manual
    By texx in forum METALWORK GENERAL
    Replies: 0
    Last Post: 12th Mar 2017, 01:31 PM
  4. Mill Users Manual
    By haemish762 in forum METALWORK GENERAL
    Replies: 1
    Last Post: 25th Oct 2011, 09:42 PM
  5. Hercus Drill Manual?
    By Quasimodo in forum METALWORK GENERAL
    Replies: 1
    Last Post: 2nd Dec 2008, 08:50 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •