Let the fun begin !!! ???

[PAULRO]

that's fine, M3/M5 starts and stops spindle

[JAZZCNC]

Ok great.!! . . . Now we can turn to speed control. But we are not going to connect any wires yet and stay with the meter.

First make sure Spindle output is enabled in Motor outputs and setup correctly. It should be set to:
Step pin = pin14
Step Port =1
Step Low active = No tick.

Next Spindle Setup. Go to Spindle control and select:
Use Spindle motor output = Ticked
PWM Control =Ticked
PWMbase Freq = 50%
MinimumPWM = 5%

Next go to menu Config/ Spindle pulleys:
Pulley #1
Minimum Speed = 0
Maximum Speed = 24000
Ratio = 1

Now set meter to DC volts. Put Positive Probe to FIV and Negative Probe to GND on XP24. ( You will need 10V from VFD connected to 10V on XP24 but leave ACM & VI disconnected)

With Spindle off (M5) you should have 0v on meter. Check this first before doing any thing.
If Ok and 0V then type M3 S12000 in MDI and you should read a voltage around 5v try this and let me know.!

[JAZZCNC]

Now set meter to DC volts. Put Positive Probe to FIV and Negative Probe to GND on XP24. ( You will need 10V from VFD connected to 10V on XP24 but leave ACM & VI disconnected)

No sorry made a Mistake here.
You need 10V and ACM from VFD connected leave VI disconnected from FIV.

Still probe between FIV and GND to check Voltage coming out.

[PAULRO]

i have
0.0 volts with M5 , as expected.
0.03 volts with M3 S12000

[JAZZCNC]

i have
0.0 volts with M5 , as expected.
0.03 volts with M3 S12000

Did you read my correction.?

Also VFD will need to be powered up.

[PAULRO]

0.0 v with M5
6.4v with M3 S12000

[JAZZCNC]

0.0 v with M5
6.4v with M3 S12000

Ok well this is where it gets a little sketchy with this BOB because I'm not quite sure which settings to tweak to fine tune the voltage.

Start by changing the Spindle Pulley Max speed to a higher number then check the voltage and see if it goes down.?
We are looking to get around 5V With S12000 and 10V with S24000.

I'll try and see if I can find out how the speed Ref voltage is handled and changed with this BOB.

Edit:
Ok well after bit of thought it occured to me that the Steps per setting in Motor tuning for spindle could be used as the Carrier frequency and with 2000 steps which I think you will be set at will give around 6V. So Leave spindle pulley Max set at 24000 and change the Steps per setting to 2400 and see what happens.?

Let me know.

[PAULRO]

my meter started to fluctuate and give different readings so i had to wait and get a new battery this morning and double check the readings against the readings from last night .
New reading as follows:( checked at least 20 times!!)
1.5v with M5
8.1v with M3 S12000.
appologies for the delay and inconvenience.

[Clive S]

[PAULRO]

funny man!!!