VFD RPM not correct and Mouse not working

[Jab814]

Hello,

Harware/Software
DC31OB
CNC10

My problem is I have a VFD controlling the spindle through programmed G-Code.
I notice when I call S800 I only get 400RPM
So I thought to do a spindle setup like in CNC11 w/AllINOne.
But my understanding that this machine does not support that.
So I have been reading about the CNC10 W/DC310OB manual.
Their is a offset trimpot and a Gain.
Could someone please explain how to adjust for this and if I am even in the right direction to correct the RPM.

I have been trying to get my mouse to work on this configuration that I recently picked up.
I have tried a usb mouse and also the older purple ported mouse to no success.
I can't seem to find much about the mouse not working and why through a search.
My mouse lights up, but does not respond on the screen. I don't even see the pointer.

Thanks,
Joe

[cncsnw]

The trim pot is the wrong answer.

You either need to change the software setting for "Maximum spindle speed (high range)" on the Control Configuration screen, to match what your inverter will do when given a full-scale (10V) request; or you need to reprogram your inverter so that, when given a 10V request, it makes the spindle go at whatever maximum speed you have on the Control Configuration screen.

The maximum achievable RPM is determined by the inverter programming (maximum output frequency). The maximum speed on the Control Configuration screen is how you tell the control what the inverter has been programmed for, so it can scale your speed requests accordingly.

[cnckeith]

Step 1.) Verify and Tune the VFD so that the commanded RPM matches the actual RPM.
1. Enter in the desired maximum spindle speed in the Wizard and write settings to CNC config.
2. Following the instructions in the inverter manual and set the inverter maximum frequency to 120hz.
3. Using the Virtual Control Panel (VCP) switch to MANUAL SPINDLE MODE and turn the SPINDLE Speed OVERRIDE all the way down.
4. Turn the spindle on CW and make sure it is turning the correct direction. If it is turning the wrong direction correct this by turning off power and swapping 2 legs of the 3 phase cable between the inverter and the motor.
5. Repeat step 3 and 4.
6. Monitor the actual spindle speed on the screen or use a tachometer and slowly increase the SPINDLE OVERRIDE until the desired maximum spindle speed is reached. If the maximum speed cannot be reached turn the spindle off and restart at step 2 with a higher maximum frequency.
7. Write down the actual frequency that the inverter is outputting (from the control panel on the front inverter) and then turn off the spindle.
8. Following the instructions in the inverter manual, set the inverter maximum frequency to the frequency in step recorded in step 7.
9. Using the VCP activate AUTO SPINDLE MODE; and with the Spindle speed OVERRIDE at 100%, Enter into MDI mode (F3) and in MDI turn on the spindle using M3 command with a speed of about 1/3 of the maximum RPM. For instance if the spindle was a 10,000 rpm spindle use 3000 RPM so the MDI command would be: “M3 S3000”. Now with the spindle running. Adjust the maximum frequency of the VFD so the actual spindle speed is as close to 3000 RPM as possible.
10. Spot check the spindle speed across the full speed range commanded vs. actual reported by the spindle encoder or hand held tachometer.
11. It is more critical for the spindle speed to be more precise at lower speeds and it is normal for the actual spindle speed to be correct at low speeds and up to 50 rpm slower at max rpm then the commanded speed.
Step 2.) Tune the VFD for best acell and decell performance. Whenever possible, use a braking resistor in conjunction with the VFD for the fastest possible stops. See the VFD manual for proper size and type of braking resistor and the associated VFD parameter settings to activate the feature (DC injection braking). Tune VFD for the fastest possible deceleration stops from Max RPM without a VFD fault. Typical VFD Spindle Motor braking and accelerating values to shoot for are 3 second acceleration and 3 second deceleration times for good results lower times are even better.
Setting Gear Range Values. Once the spindle speed has been calibrated, If there is a multi-range spindle in use, use the Acorn Wizard to setup the gear range values.
For example,
1.) Set the belt/pulley or gear selector highest range. Command the maximum speed, in this example its a lathe with max spindle speed of 4000rpm, verify spindle is spinning the commanded 4000 RPM with a tach or encoder.
2.) Set the belt/pulley or gears to medium speed, run the spindle at S4000 and take note of the spindle RPM. Let's say it was 2000rpm. 2000/4000 = .5 So, set the second range (medium range) ratio value in the Wizard to .5
3.) Set the belt/pulley or gears to low speed, again run the spindle at S4000 and took note of the spindle RPM. Let's say it was 1000rpm. 1000/4000 = .25 So, set the second range (medium range) ratio value in the Wizard to .25

[Dan M]

Hello,

Harware/Software
DC31OB
CNC10

My problem is I have a VFD controlling the spindle through programmed G-Code.
I notice when I call S800 I only get 400RPM
So I thought to do a spindle setup like in CNC11 w/AllINOne.
But my understanding that this machine does not support that.
So I have been reading about the CNC10 W/DC310OB manual.
Their is a offset trimpot and a Gain.
Could someone please explain how to adjust for this and if I am even in the right direction to correct the RPM.

I have been trying to get my mouse to work on this configuration that I recently picked up.
I have tried a usb mouse and also the older purple ported mouse to no success.
I can't seem to find much about the mouse not working and why through a search.
My mouse lights up, but does not respond on the screen. I don't even see the pointer.

Thanks,
Joe

I had my mouse not working when I first tested my spindle. It was because I didn't have my drain wire connected yet to the earth ground. It sounds like you are having the same problem. Do you have a shielded VFD cable with the drain wire connected to the earth ground? If not that's probably the problem.

Dan

[Jab814]

Thanks Guys,
cncnw
I did what you told me to do, worked perfect.

cnckeith
I couldn't find the program to do that in cnc10. I used that method on all the other controllers. Thanks

Dan M
I haven't really had a opportunity to open up the vfd cabinet, it has its own isolated cabinent. I notice there is a grounf wire leaving the vfd but I haven't looke to see where its going in the other cabinent.

Thanks for all your help, much appreciated
Joe