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  1. #1
    Quote Originally Posted by eurikain View Post
    Here is how I understand it: when you power up everything, the spindle can move forward because the loop DCM/FWD is closed. If the relay goes off, the circuit opens and the VFD stops the spindle because its DCM/FWD loop is broken. I am wrong again ?
    Correct works exactly like that. Very simple.

  2. #2
    As Dean says just a simple circuit connecting 2 wires together.

    Away from pc and workshop but there are photos of power supply on my build log 'router mk 3' or something like that
    Capacitor cables are one cable with the sleeve cut out at the right intervals then soldered to the terminals
    Building a CNC machine to make a better one since 2010 . . .
    MK1 (1st photo), MK2, MK3, MK4

  3. #3
    Quote Originally Posted by JAZZCNC View Post
    Correct works exactly like that. Very simple.
    Very simple but not obvious for me haha ^^

    Quote Originally Posted by routercnc View Post
    As Dean says just a simple circuit connecting 2 wires together.

    Away from pc and workshop but there are photos of power supply on my build log 'router mk 3' or something like that
    Capacitor cables are one cable with the sleeve cut out at the right intervals then soldered to the terminals
    Smarty pants ! That's a great way to do it ! Just need to get the hand at cutting the sleeve without cutting the wire haha :) Thanks for the advice ! It makes things much more simple. Will 2.5mm2 cable be enough ? My friend that works for the Belgian electricity company says 6amps per 1mm2, so 2.5mm2 goes 15A, good bet right ?

  4. #4
    Quote Originally Posted by JAZZCNC View Post
    Correct works exactly like that. Very simple.
    Jazz, when looking at my VFD manual, it looks like instead of the FWD (which is actually labelled FOR) I should use the RST pin.. If I wire the FOR-DCM loop through the relay, the spindle will start automatically right ? I'm not sure that's the behaviour I want.. I just want to be able to manually control the start/stop speed etc with the VFD front panel, but automatically stop when the relay goes off. I know you're gonna end up thinking I'm dumb, but I promise I'm not that stupid haha :) Now, if using the DCM-RST loop, I guess it would have to be normally closed, so that when nothing's powered the spindle does not start, when the relay is on the RST line is off so the spindle can start/stop as I will, and then when power goes off (due to pressing the e-stop) the relay goes off and the RST line closes which stops the spindle.
    Last edited by eurikain; 30-01-2016 at 01:02 AM.

  5. #5
    Quote Originally Posted by eurikain View Post
    Jazz, when looking at my VFD manual, it looks like instead of the FWD (which is actually labelled FOR) I should use the RST pin.. If I wire the FOR-DCM loop through the relay, the spindle will start automatically right ? I'm not sure that's the behaviour I want.. I just want to be able to manually control the start/stop speed etc with the VFD front panel, but automatically stop when the relay goes off.
    Ok well same thing really just controling a different function and how you describe the relay etc is correct. BUT why wouldn't you want the software to Control ON/OFF if you have the abilty.? . . It makes life so much easier.!
    You can walk away from the machine and Know it will stop the spindle when finished. It will Stop the Spindle between Tool changes and Start again when press Cycle start. Which is great when learning because it's common for people to push Cycle start after tool change then realise they haven't started the spindle.!!

  6. #6
    Quote Originally Posted by eurikain View Post
    Jazz, when looking at my VFD manual, it looks like instead of the FWD (which is actually labelled FOR) I should use the RST pin.. If I wire the FOR-DCM loop through the relay, the spindle will start automatically right ? I'm not sure that's the behaviour I want.. I just want to be able to manually control the start/stop speed etc with the VFD front panel, but automatically stop when the relay goes off. I know you're gonna end up thinking I'm dumb, but I promise I'm not that stupid haha :) Now, if using the DCM-RST loop, I guess it would have to be normally closed, so that when nothing's powered the spindle does not start, when the relay is on the RST line is off so the spindle can start/stop as I will, and then when power goes off (due to pressing the e-stop) the relay goes off and the RST line closes which stops the spindle.
    What you could do is use a two way switch with centre off. One way would switch the FOR-DCM directly and the other would put the FOR-DCM through a relay controlled by the BoB. That would give you three modes :- Fully ON,Totally OFF and Automatic. I do this for my Kress spindle and also my chip blower. I will probably do the same when I build the next machine with a VFD controlled spindle.

    Cheers,

    Rob
    Last edited by cropwell; 31-01-2016 at 02:27 PM.

  7. #7
    Clive S's Avatar
    Lives in Marple Stockport, United Kingdom. Last Activity: 15 Hours Ago Forum Superstar, has done so much to help others, they deserve a medal. Has a total post count of 3,345. Received thanks 618 times, giving thanks to others 87 times. Made a monetary donation to the upkeep of the community. Is a beta tester for Machinists Network features.
    Rob I see the trouble with this is starting the machine code with the switch not in the correct position and then not getting to the Osh#t button fast enough
    ..Clive
    The more you know, The better you know, How little you know

  8. #8
    Quote Originally Posted by Clive S View Post
    Rob I see the trouble with this is starting the machine code with the switch not in the correct position and then not getting to the Osh#t button fast enough
    I agree, but when you have done it a couple of times, you learn. I check the switch is in the correct position, but the 'always on' position is down, so you can hit it faster than the osht in my case. After having my finger bitten by the machine, it also helps my confidence to put it to 'off' whilst doing a tool change and restarting the code does not fire up the spindle, so I switch it to 'on' before continuing. My new Cam software puts out the M03 after a tool change though.

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  10. #9
    I hear you, but I don't see how the connecting the FOR-DCM loop through a relay would help the software control the VFD/spindle. For that I need to wire it to the BOB's VFD control interface, which I currently don't know how, as explained in my first post of this thread. I've given my BOB's model and manual already but I don't know how to use the BOB spindle control interface to control the vfd.. I would love someone to provide a simple wiring diagram with on one side the BOB's VFD control terminal and on the other side the VFD control interface and tell me how to wire the together.. I'm so sorry for looking like an idiot, but I prefer having someone explaining it clearly to me so I can understand it, because so far I haven't found such diagram on the forum.. :(

  11. #10
    Quote Originally Posted by cropwell View Post
    I was not intending to use panel control, but speed and direction control from the CSMIO-IP-S.
    Eurikain was talking about using the control panel but in anycase I don't see the point in what you suggest other than to disable ON?OFF. The Software allows you to manualy control spindle ON/OFF rather than G-code. The way you Suggest would work but is open to Error from forgetting to switch back and not turn spindle on before code starts and I don't care how fast you think you are there will be times when you do for get and can't reach it. Just like you can't reach O-shite button fast enough before it snaps cutter.!!
    If you do want an actual Manual ON/OFF switch then better to use an Input and set up OEM trigger in Mach to turn Spindle ON/OFF.
    If for Safety reasons then would only do this if it was tied to Reset so Control software can't start.

    Quote Originally Posted by cropwell View Post
    My understanding was that DCM connected to FOR by a relay would cause the VFD to spin the motor according to the (0-10v) voltage applied to V1 and that opening the DCM, FOR connection would allow it to coast to a stop. All the setup articles I have seen are just how to connect R,S,T to single phase input and UVW to the motor, presumably then using the front panel to control ON/OFF and speed. I can't find any proper explanantion of the way RST (reset) works and what exactly it does.
    Your understanding is correct.
    RST works just like Pressing STOP. Each of the VFD Inputs are programmable and can be set to do various controls and RST is set by default to same as pressing STOP button on control panel. When you Connect DCM to RST it Stops the VFD. Putting this thru E-stop contact will disable the VFD


    Quote Originally Posted by eurikain View Post
    I would love someone to provide a simple wiring diagram with on one side the BOB's VFD control terminal and on the other side the VFD control interface and tell me how to wire the together..
    I'm not trawling back thru your posts to find out what BOB etc you have but if you post details again then I'll draw something for you.
    Last edited by JAZZCNC; 01-02-2016 at 01:56 PM.

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