If you can power up the VFD without the motor connected and go through some of the functions of setting parameters without an alarm etc it should be OK.
Al.
Last edited by Happy Feet; 05-29-2018 at 10:33 AM.
If you can power up the VFD without the motor connected and go through some of the functions of setting parameters without an alarm etc it should be OK.
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.
That looks like the low voltage Board, how did you have the input terminals connected and to what
Having the minimum setting at 0 did not smoke that board, not have a Ground at the spindle can do this, or incorrect terminal wiring
You can check the spindle with a meter, all 3 pins should have almost the same readings
Pin 1 to Pin 2
Pin 2 to Pin 3
Pin3 to Pin 1
Ground Pin 4 to spindle body
Mactec54
sorry guys i was out of order these days.
I have run the cnc for about 5 minutes twice and all seems fine. today i got my rs485 boards ( one db9 and one usb) .
i ll check the spindle's resistance today and will post the readings here.
my guess is that something happened with the fan for the very beginning and that probably caused an overtemp issue.
Last edited by Happy Feet; 06-14-2018 at 06:34 AM.
ok the resistance beetween the 3 pins were identical 4.4ohm . the 4th pin doesnt short with the spindle body . my earth connection is connected to the body through the water outlets.
i ll go doublecheck everything.i also installed the usb board for the vfd and the software it needs ( ms packages, netframework and dll) . i am keep getting that the spindle is unable to communicate with mach3.
edit: it wasnt hard to find . i had the data+ and data- wrong way. now it everything ok . something that i have noticed . My spindle doen't go more than 0.7 amps no matter the speed it is running. is it normal ? also what can i do to get the amps on mach? i am only getting the rpm at dro.
Last edited by Happy Feet; 06-14-2018 at 01:58 PM.
Having a "balanced" resistance between your spindle windings is what you want, so you good there.
You also have to now measure between any one of the three pins and the spindle body......this will indicate insulation resistance to earth. Ideally with a multimeter you want an open circuit.
I use an insulation tester for this test but you should get an idea with your multimeter.
note you want to do this test with the spindle motor disconnected from the VFD, otherwise you may get false readings
A few things to consider with regards to the VFD cabling etc...
1) The cable used between the VFD and spindle motor should be rated correctly......that is current carrying capacity and the cable insulation should be able to withstand the voltage applied, else there would be "leakage"
2) When testing for a fault on the spindle motor.....don't forget you could have a short or break in the wiring to the spindle. So its easier to start the test by testing from the cable at the VFD.....this way you actually testing the cable too. If you find a fault then you would disconnect/unplug the cable from the spindle motor to determine whether its the motor or cable that's faulty