502,673 active members
5,057 visitors online
Register for free
Login

Search:

Type: Posts; User: Al_The_Man

Page 1 of 20 1 2 3 4

Search: Search took 0.27 seconds.

  1. Re: Wiring new controllers and the other things!

    One other reason to look up the NFPA79!
    Al.
  2. Re: Wiring new controllers and the other things!

    If wiring up an enclosure you should get hold of a copy of NFPA79, Electrical Standard for Industrial Machinery.
    I believe there is still a copy available out there in PDF.
    Al.
  3. Re: Can a VFD be used to add variable speed control to this type of motor?

    One main issue is that the ones that exist, the motor can drop out of run at either at low RPM or when loaded, hence the popularity of 3ph versions.
    Al.
  4. Replies
    8
    Views
    172

    Re: looking for metal control cabinet

    I would suggest obtaining any hardware needed before manuf. so they can incorporate it.
    I have done this on occasion where off the shelf was expensive.
    For any operator panel I have used a local...
  5. Replies
    8
    Views
    172

    Re: looking for metal control cabinet

    If a unique design, have you considered custom from a local Tin Shop? Look for one that has a decent reputation, you can get any hardware from Hammond etc.
    You can save money by painting it yourself...
  6. Replies
    6
    Views
    78

    Re: Galil d300 interface board

    What is wrong with the original, maybe fixable, if there is a problem.
    Usually there is not a lot to them.
    Al.
  7. Replies
    6
    Views
    78

    Re: Galil d300 interface board

    I have never seen that version either.
    I do have some old surplus Galil break out boards, one does not have a number, it has the I/O and encoder feedback inputs with LED indicators.Has IDC sockets...
  8. Replies
    4
    Views
    71

    Re: VFD with Standard 3ph motor

    I to have been using VFD's since the late 80's, all were standard AC motors also there was no 'VFD' cable out there then.
    The earliest motor fitted was on a 1954 machine retro fit 30' bed planer....
  9. Re: Is there any actual upside to gear-free DC spindle motors?

    This months Electrical Business
    https://www.cnczone.com/forums/spindles-vfd/381922-vfd-standard-3ph-motor.html
    Al.
  10. Replies
    4
    Views
    71

    VFD with Standard 3ph motor

    Article in this months Electrical Business on using VFD and standard motors.
    http://magazine.ebmag.com/publication/?m=46123&l=1#{%22issue_id%22:592928,%22page%22:26}
    Al.
  11. Re: Is there any actual upside to gear-free DC spindle motors?

    Typically quality DC and BLDC motors exhibit maxim torque at zero RPM, with the continuous torque curve fairly flat up to max RPM.
    See the Manuf. torque specs if published.
    There is a sometimes a...
  12. Replies
    35
    Views
    391

    Re: Any pics of cnc control cabinets?

    Also one publication aimed at machine/enclosure wiring is NFPA79, you most likely can find a copy out there in PDF.
    I would add that just about anything used in a PC desktop/tower environment is...
  13. Re: Linear Toroidal PSU for DYN2+400W DMM servos

    If using the two 25v winding's, I would not GND the CT, if rectifying 50vAC followed with a smoothing capacitor you end up with close to 70VDC.
    You could reduce accordingly by removing a few turns...
  14. Replies
    35
    Views
    391

    Re: Any pics of cnc control cabinets?

    And often component suppliers will stress not to earth ground the common of their equipment, from what I have personally gleaned it is often not because of a technical reason, but to avoid any blame...
  15. Re: Linear Toroidal PSU for DYN2+400W DMM servos

    Not sure what you mean by picking the secondary winding's, what supply voltages are you wanting to end up with, When winding on it pays to go full circle with the winding if it is a low turn one,...
  16. Replies
    35
    Views
    391

    Re: Any pics of cnc control cabinets?

    There are two schools of thought out there, some that say you should never ground any of the DC supply commons, the other is to earth reference all supplies, I have always followed the latter...
  17. Replies
    35
    Views
    391

    Re: Any pics of cnc control cabinets?

    A unwritten law is that the enclosure you order always ends up being at least 5% too small! :rolleyes:
    I have often got deals on used enclosures off ebay, some came with disconnect, terminals,...
  18. Re: Linear Toroidal PSU for DYN2+400W DMM servos

    I have modded a few Toroidal Transformers, the turns per volt works out to about 1.5 to 2 T/volt, if you don't need any regulation for the control circit, a simple bridge is all that is needed.
    The...
  19. Re: Can you take step / direction from G540 to run old analog servo motor?

    If they take standard step direction there should be no problem but is there commutation and position feedback on the motor for the drive?
    How were they controlled previously?
    Al. .
  20. Replies
    15
    Views
    141

    Re: Treadmill motor/drive help

    I'm not familiar with the HF or CNC4PC, I was mainly responding regarding the TM motors, as I mentioned there is the MC2100 that requires a 20Hz PWM command and also uses PWM power signal to control...
  21. Replies
    15
    Views
    141

    Re: Treadmill motor/drive help

    I have found that out of the Chinese motors fitted, the Johnson is one of the better quality ones, also using a MC2100, instead of the MC-60 SCR bridge type, provides much smoother control, as I...
  22. Replies
    15
    Views
    141

    Re: Treadmill motor/drive help

    As stated, the MC-60 just needs a 5k linear pot to run, the motor has a direction on the plate because of the threaded flywheel pulley.
    It is the MC2100 that requires a 20Hz PWM signal to run, I...
  23. Replies
    4
    Views
    42

    Re: Controller Wiring Type

    For control enclosure wiring it is definitely customary to use stranded conductors, there is TEW/MTW etc, but if packing a lot of conductors in a raceway, I use TR64 control wire, the insulation is...
  24. Replies
    10
    Views
    96

    Re: Camsoft installation

    It's been a few years now, when I used Galil cards of all stripes, but generally I tested them with the basic Galil programs such as DMCterm etc, this way you can see if the card is recognized and...
  25. Replies
    0
    Views
    58

    Re: Chinese lathe electrical help

    What is the nature of the overload device? Probably a simple thermal breaker, you may have over taxed it, now needs replacement, I doubt if P.A. carries spares, check the make model No. and rating...
Results 1 to 25 of 500
Page 1 of 20 1 2 3 4