New Build King Rich KRV-3000 Knee Mill with GSK AC Servos DA98B driver

[dmbgo]

Thanks Tom, I didn't think you were condescending, I was just trying to explain why i might seem a bit slower on the uptake sometimes .
It's not so much lack of knowledge, but more integration of that knowledge that I sometimes struggle with. Anyway I will do as you say and move along.
I have to decide whether to scrap the existing electrical config, and change to one that I understand, or whether to try to work out the logic behind the existing config. I am sure that the original designers knew what they were doing.

[dmbgo]

I've made a list of "to do" things for the Mill.
Currently (I love ticking things off the list) I have:

Fit Spindle encoder and make sure measured Rpm matches reality √
Get Spindle VFD under Acorn control √
Make servo cables DB9 on controller end DB25 on servo end, for X:,Y: and Z axis √ (Z: isn't right yet)
Get Axis moving - X: and Y: axis now move under Acorn control √ Z: to come.
Calibrate axis movement - to get Z: axis sorted 1st
Get coolant working under Acorn control
Other things that I haven't thought of yet?
Suggestions?

[dmbgo]

The time has come to get the Z: axis working under Acorn control.
Yesterday I spent many hours discussing the Acorn CNC controller with the Chinese supplier that I initially bought the Z: axis AC servo drive and motor from.
I also made a couple of different versions of the cable from the Acorn controller to the servo controller to his specification, with no success - yet.

Here is his suggested way of connecting to the Acorn from the AC servo controller:

I have attached the manual for the TAC-GA3230B AC Servo controller to this post:

Needless to say, the TAC-GA3230B isn't currently working.

[dmbgo]

The Z: axis motor now works. All I had to change this morning was one of the AC Servo drive parameters. With the above cable, there is a setting on the drive you must set: P1-006 to H000, not as mine was set to H001.
The indicator that this might be an issue, is that the motor shaft must be locked when the Acorn is turned on and connected to the servo drive. If the motor shaft is free to turn by hand, when the Acorn is switched on, then it will not work.

[dmbgo]

I need to setup my new rotary Axis now. It is a Chinese Tomatech rotary table. The rotary axis uses an Adtech QS7AA010M servo driver and an ACH6040DC servo motor.

[dmbgo]

I also need to purchase a full license for the mill version of the software and an extra mpg. I notice that you need the full version to use a 4th axis, so now might be the time

[dmbgo]

Righto, now I have bought the full license for the mill, and an MPG. it will take a while to arrive in Australia, so I'll have to find something else to do in the meantime.

[suntravel]

Hi you don't have to wait for the license, it comes with email ....

... I think mails will also arrive in Australia fast

Uwe

[dmbgo]

I think you're almost right Uwe, but I recieved an email from Centroid this morning, that said I needed to send a report to get the license. I didn't notice that requirement when I bought the license. I've sent the report now, but it is the weekend, so perhaps Monday?

[dmbgo]

I've moved back to the Z: axis this morning. I noticed that the servo controller was intermittently coming up with an error (Er015). This is a maximum current error from the servo drive, which means that I am exceeding its maximum capacity. I confirmed this by looking at parameter Fn-03 on the servo drive.
Fn-03 displays a percentage of capacity of the drive, while the axis is moving.
When I moved the knee upwards Fn-03 showed that I was using 99% of the servo drive's capacity.

I have a few options here:

1/ Get a more powerful servo drive / motor.
2/ Stop trying to move the knee by CNC and change to moving the quill instead.
3/ Alter the pulley / motor ratio on the knee and proceed with the current setup.

The knee uses a system with a small toothed pulley on the servo motor and a larger pulley that drives the knee. the large pulley is currently 70mm in diameter and the small toothed pulley is around 48mm. I have a 90mm pulley spare, so I was thinking that this might be enough to reduce the effort for the motor to move the knee.
What do you think?