K2cnc spindle stopped for KG-4925

[CNCMAN172]

Robert,

Be VERY CAREFUL when measuring these voltages. The UVW signals are the power to the motor they are reading low because the motor is not spinning.

I am checking the VFD manual right now to see if I missed one of the parameters. Agree it is very close.

This VFD needs to have 220VAC between L1 and L2 are you sure you have it wired up to 220V single phase. I see they have wires on all three phases but you need to unplug the VFD and take a picture of the plug and ensure you actually have 220V power, it will never spin on 120V.

Russ

[Rob505]

Russ,

I'm pretty sure it's wired for 3ph. We have 208 vac btw legs 1/2 and 1/3. I get 120 if I test btw ground and any leg.

Robert

[CNCMAN172]

Robert,

Please check the following parameter.

04-07 this is for the multifunction input #4 which is wired on the VFD and I also saw another K2CNC machine that uses that same input.

04-15 is AUI analog input bias, what is this set at right now?
04-16 is AUI bias polarity, what is this set at right now?
04-17 is AUI input gain, what is this set at right now?
04-18, is No AUI negative bias command, what is this set at right now?



Also check
05-00 to 05-14, these are step speed frequencies.

finally check 05-15 and let me know how it is set as well. Thanks

Russ

[CNCMAN172]

Robert,

OK, please check between phases, L1 to L2, L2 to L3, L1 to L3 if you have three phase power. If all of those measure about 220V that is good and we can move to the next step. Each of the phases should measure 120VAC to Ground.

Russ

[Rob505]

Russ,

Here is what I have.
04-07 set to 20
04-15 set to 00
04-16 set to 00
04-17 set to 100
04-18 set to 00

05-00 to 05-15 all set to 00.

Robert

[Rob505]

Robert,

OK, please check between phases, L1 to L2, L2 to L3, L1 to L3 if you have three phase power. If all of those measure about 220V that is good and we can move to the next step. Each of the phases should measure 120VAC to Ground.

Russ

OK we have 208 power to the shop so all reading are 208 btw legs L1 to L2, L2 to L3, L1 to L3

Robert

[CNCMAN172]

Robert,

That is perfect. Now will you take a few minutes and fill out the YELLOW part of this excel worksheet with your VFD settings and we can get this last issue fixed.

Russ

[CNCMAN172]

Robert,

I appears they are using MI4 as an EMERGENCY STOP input to the VFD so if Kmotion has estop condition it will stop the spindle.

Back in about an hour have a work call.

Russ

[Rob505]

Russ,

I did not have excell on the cnc computer so I had to transfer from another computer.

here it is!

Robert

[CNCMAN172]

Perfect,

Now can you please send the details of your spindle, the model perhaps a photo that shows the label with the various parameters like Speed, etc. I need to ensure those are correct in your VFD.

Russ

[Rob505]

Hi Russ,
Sorry I stepped away.
See attached for HSD spindle info.
Robert

[CNCMAN172]

OK perfect, in a meeting right now will get you some adjustments in about one hour.

Russ

[CNCMAN172]

Robert,

OK, I know what is wrong, but not exactly why. Let me explain....

First make the following changes in the VFD

02-05, set to 00
02-11, set to 03
02-13, set to 03
02-15, set to 300

04-07, set this one to 00, this is only a TEMP setting while I provide a point. This is used for the ESTOP input into the VFD from MI4.

The problem is the spindle is not starting because it being faulted immediately by the ESTOP input. We are going to disable temporarily to get the spindle to work.

This is probably and issue because a program is messed up in a c program, which I will investigate or a hardware fault on the breakout board. After you make these changes please see if the Spindle moves when commanded.


Russ

[Rob505]

Russ,
No luck with the new settings.
Robert

[CNCMAN172]

Robert,

Did anything happen did you see anything flashing on the VFD, anything at all? We might set the VFD to manually control the spindle from the VFD keypad to ensure the spindle is actually good and working.

Russ

[CNCMAN172]

Robert,

I forgot to mention because the VFD faulted please turn it off and turn it back on to ensure it has the fault cleared and test it again.

Russ

[Rob505]

Russ,

Yes, stuff happens but I'm not sure what I should be paying attention to.
Example, in the 'H" display it starts at 0.00 and when spindle is activated this number goes up to about 4000 give or take a couple of hundred because its in flux and then back down to 0 when spindle is off.
"U" stays at 4000 with flux.
"HU" starts at 0.00 and goes to about 2000 and then back to 0 when spindle is off.
"F" starts at about 8 then goes to about 70 but only after a turn everything on. It does not seem to react to the spindle on/off.

Robert

[CNCMAN172]

Robert,

"F" is the requested Frequency, so F at 8 is extremely show pretty much off. When F goes to 70 that is requesting 70Hz out of max of 300Hz so about 25% of the spindle speed.

"H" is the Output Frequency at the motor terminals, that should be between 0 and 300Hz again, so not sure the 2000 makes sense.

You can program the screen to output different information, I might have you set the VFD for keyboard control and see if you can get the motor to spin at all.

Have you ever seen this motor run at all?

Russ

[Rob505]

Yes, it was running shortly before everything started to go haywire.

[CNCMAN172]

Robert,

We need to do a test with the VFD and Spindle to ensure they still work. You might have lost the spindle or VFD or both, the VFD does seem to be doing something so maybe it is fine. First turn off the VFD and when the display is blank try and rotate the spindle with no power, please ensure it spins easy in both directions. Also smell and see if you detect any burnt smell around the spindle.

If both of those look good, then I will have you program the VFD to control the spindle using just the VFD keypad.

Russ