Fanuc servo motors, early red cap.

All things related to Centroid Oak, Allin1DC, MPU11 and Legacy products

Moderator: cnckeith

cncsnw
Posts: 3763
Joined: Wed Mar 24, 2010 5:48 pm

Re: Fanuc servo motors, early red cap.

Post by cncsnw »

Since this is not an Allin1DC system (which would have hardware inhibits associated with the limit switch inputs), you don't need to do anything with the inputs that would ordinarily be used for limit switches. You just need to go to Machine Configuration -> Motor Parameters and change all of the "Limit" input numbers to zeros.

In your last report, on the Machine Configuration -> Motor Parameters table, you had specified that INP1 was the Z- limit, and INP3 was the X- limit. You had also inverted those inputs using the Alt-i display. If you also had jumpers wired to those input terminals, then you would get "407 ... limit tripped" messages.

If you truly have no limit switches, and do not plan to add them, then you should change the Limit (and Home) input numbers to zeros; un-invert INP1 through INP6; and remove any extraneous jumper wires from those input terminals.

If your E-stop contactor is not closing, then the drives will be unable to move the motors. Is your E-stop contactor closing when you release the E-stop button? With E-stop released, what voltage do you measure on the VM+ and VM- terminals going into your ACDC drives?

For initial testing, don't try to use the MPG. Use your jog panel pendant instead. If you do not have a jog panel pendant, and cannot afford to buy one, then install a wide-screen monitor and set P219=1 to use the Virtual Control Panel (VCP).
cis
Posts: 7
Joined: Mon Jun 21, 2021 5:54 pm
Acorn CNC Controller: No
Allin1DC CNC Controller: No
Oak CNC controller: Yes
CNC Control System Serial Number: none
DC3IOB: No
CNC12: Yes
CNC11: No
CPU10 or CPU7: No

Re: Fanuc servo motors, early red cap.

Post by cis »

The servo motors can now be jogged manually, there where 2 problems:
-thx to the advice to check the VM+ and VM- terminal, there is 350 Volt. The reason why there was no voltage,one contact of a the thermo-magnetic circuit breaker was not switching, so the input voltage for the rectifier was not ok. Changed the circuit breaker and the output of the rectifier is 350Volt.
-the second problem, the coil of the CNT1 contactor (A1 and A2) was receiving 24V, but the contacts where still open, changed this contactor and can now jog the servo motors manually.
Maybe the following problem needed to be started in a new topic, can the modertor asses this? I have not found some information in this forUm about the problem.
The soft limit switches have no "jumpers" wires on the input of the OAK board connected, all contacts are open. Values for the travel distance Z-have been set to -950mm,for X- on 210 mm. In the "control configuration", Machine home at pwrup is set to Ref Mark-HS. Attached a fresh report with all the actual settings.When the X and Z position is jogged on the reference marks, set the home position on the screen and after manually setting X and Z for the reference of the workpiece, the cnc programs as demo run very well. The loadmeter for the Z axe gos maxium to app. 80% in rapid feed,k stays in the orange zone, the red zone is never visible. The X axe gos maximum tp app. 30%, in rapid feed. The srevo motors are ste according the advice of cnckeith because of the "small" servo motor, in particular for the X axe. 41% for the Z axe and 26% for the X axe. After 6 hours of running the different demo programs, the servo motors are not heating up, the surface temperture is almost the environt temperature. When a program is finished and the machine is set with the Park function automatically close to the ref marks, indeed that works very well. But after a complete stop, complete power down and a full restart of the lathe, when the software is ready and starting with the cycle start button there comes a failure on the screen"Z axis home differs by 15516 counts, accept new position (y/n). On the screen is visible 1. M92/X 2.M26/X 3.M92/Z 4.M26/Z. The numbers of the counts change by each full restart. What can be reason from this message/problem and how can this be solved? Attached some pictures of the screen with the message.
Maybe the follwong problem needed also to be started with a new topic, can themoderator asses this also?
The load meters for the X and Z axis are visible on the screen. The load meter from the spindle in not visible, the VSD a Mitisubishi Freqrol A200 has a output 0-10V for a load meter, is correct connected on the Oak board.When i follow the TB296(Rev1), P35 is set on 0, P57 is set on 0, P137 is set on 0, P143 is set to 1and P313 to 12. If the PLC logic is ready for the load meter issomething i cannot see. How can get the load meter for the spindle and the X and Zaxis on the operator screen?
Thx in advance for advice to solve this problems.
Attachments
DSCI0317.JPG
DSCI0316.JPG
DSCI0315.JPG
DSCI0314.JPG
DSCI0313.JPG
DSCI0312.JPG
DSCI0318.JPG
report_0714200992_2021-09-08_16-14-58.zip
(3.91 MiB) Downloaded 87 times
cncsnw
Posts: 3763
Joined: Wed Mar 24, 2010 5:48 pm

Re: Fanuc servo motors, early red cap.

Post by cncsnw »

Just answer "Y" to the prompts.

If you use Park before shutting down, then don't move either axis (e.g. by hand while powered off), then power up and home, then you generally should only get these warnings the first time you home from the Park position.

What the warning means is that the distance, from wherever the axes were sitting when you began the homing cycle to where it found the encoder index pulse, was different from the last time by more than 1/4 of a motor revolution (1.25mm). If you are jogging to the vicinity of index marks before homing, it would be easy to be off by that much from one day to the next.

Again, just answer "Y" to the prompt whenever it appears, then, if you want to be diligent about it, check whether the final homed position of the axis is exactly the same as it was before.

The home-distance warning is really for the benefit of machines with limit switches. You can disable it entirely, if you want, by editing the "homelog.txt" file and changing the numbers in the first column from 25 to 0.
Post Reply