Page 2 of 2 FirstFirst 12
  1. #11
    m_c's Avatar
    Lives in East Lothian, United Kingdom. Last Activity: 3 Hours Ago Has been a member for 9-10 years. Has a total post count of 1,834. Received thanks 192 times, giving thanks to others 5 times.
    Maybe



    (It's been a long week!)

  2. #12
    Hi,

    a time delay is quite hard to implement - and you'd also need something like a beeper telling you the timer started - otherwise you'd be facing the same trouble just a few seconds later.
    Voltage spikes due to interferences are no problem - a mechanical contact will not act at all as the energy is much to low (and even if - it would fall back immediately) and a solid state relay will just switch on for one cycle and then stop again.

    If you really worry about it put a switch into the control or power line as suggested before. However in case of a spindle with VFD: never put a switch between VFD and spindle - you'll kill the VFD if you accidentially switch while running.

    Christian
    2D / 3D CAM Software and CNC controller: http://www.estlcam.com

  3. #13
    In my control box I have a 3 position switch - Auto (which goes thru the relay), Off and Manual. My greater concern is that LazyCam sometimes doesn't generate the M code to start the spindle, in which case I have to hit the E-stop before the tool breaks.

  4. #14
    as an ex employee of www.emachcnc.com we used to use m3 to turn on spindle and m5 to turn it off, the output from the controller switched a relay, for added safety we supplied the inverter via a contactor, whose coil was switched via a key switch, as far as the HSE were concerned, as long as the facility to remove a tool ( key ) to make safe the spindle, it was deemed safe to handle.

Page 2 of 2 FirstFirst 12

Similar Threads

  1. EMCO Spindle Control
    By Pete92 in forum Spindles & Drive Motors
    Replies: 1
    Last Post: 06-11-2013, 10:20 PM
  2. PCPPS B.O.B. - OK for spindle control?
    By birchy in forum Spindles & Drive Motors
    Replies: 4
    Last Post: 09-09-2013, 12:50 AM
  3. Spindle Speed Control
    By cncJim in forum Spindles & Drive Motors
    Replies: 15
    Last Post: 18-06-2013, 07:53 PM
  4. Replies: 2
    Last Post: 11-12-2012, 12:58 PM
  5. Help with spindle control
    By wizzy in forum Spindles & Drive Motors
    Replies: 4
    Last Post: 12-02-2011, 12:51 AM

Bookmarks

Posting Permissions

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