Oak with Delta C2000

[harishom]

Hello I just upgraded VFD on my mill. Delta C2000 Plus. Followed TB316.pdf to configure all the settings.
I was testing Rigid tapping, and start getting this message "Waiting for spindle direction" randomly when there are many holes to tap. it ahappens randomly. Any idea what could be the cause ?


Thanks

[aamir]

Your tap rpm?

[harishom]

Tap rpm = 500

[cncsnw]

Maybe try a longer dwell time?

I don't know that I have ever seen that message, but it sounds like what CNC12 should say if it gets to the next XY hole location, but the spindle has not finished stopping and reversing from tapping the preceding hole.

If it is just an informational message, and CNC12 proceeds to tap all the holes without error, then you could also just ignore it.

[harishom]

actually machine just stops randomly "waiting for spindle direction" while tapping. I have connected zero speed out from vfd to OAK (input 12) not sure where to connect "speed attained output". is it really required ? MDI works fine with M3 SXXX and M4 Sxxx commands for spindle speed and direction.

[harishom]

Ok tried increasing dwell time , situation is still same. Any idea ? I think there might be some parameters which might need to be tweaked on Delta C2000 Plus VFD.

[cncsnw]

I don't think the rigid tapping cycle cares about zero-speed or at-speed digital inputs. All it cares about is the spindle encoder feedback.

At what point in the tapping cycle does it "stop randomly"?

You have not posted a Report, so we can only guess at your configuration (e.g. P68, P69, P78, P82 etc.).
Supposing that you have P78 set to display actual speed of the spindle encoder in the status window, what does the spindle speed in the status window show when the tapping cycle stops and waits?

[harishom]

it stops randomly sometime just after 1 cycle sometimes 4 or more. when spindle is rotating it shows programmed speed 500rpm. while it shows "waiting for spindle direction" speed is 0
attached is report.zip.

[cncsnw]

Good information.

You have a hardware/electronic/connection issue with your spindle encoder feedback.

Since you have P78 = 1, the RPM display in the status window is the actual speed at which spindle encoder counts are coming into the Oak, from the spindle encoder, by way of the EMC-PG01L board.

If that number changes to zero, it is because spindle encoder counts have stopped coming in.

Assuming you are running the spindle drive in closed-loop vector mode (FOCPG mode, Pr.00-11 = 3) then you can reasonably assume that the encoder, and the connection from the encoder to the drive, are okay: otherwise you would probably get a spindle drive fault. Therefore the problem is likely with the output signal from the EMC-PG01L board, or the cable that carries that signal to the Oak.

[harishom]

yep I am running EMC-PG01L with Haas encoder ABZ and 00-11 = 3 , VFD doesn't complain about any error regarding encoder etc.
I double checked the connections and found out encoder connections on OAK case (9 pin D-connector) are different than in this https://www.centroidcnc.com/dealersuppo ... ds/123.pdf. (last page ) A and B are flipped. (attached pic)