Irregular Spindle Speed

[Doddy]

Just a quicky for Jazz - I know where you're coming from with the plate on the spindle, but googling the part number throws up bugger all info on aliexpress, but it does suggest that it can be wired star or delta, and a 6-pin connector on the spindle brings out each winding separately, and that the coil voltage is 220/380.

OP - Might be worth posting a photo of the electrical connector on the spindle.

[JAZZCNC]

Just a quicky for Jazz - I know where you're coming from with the plate on the spindle, but googling the part number throws up bugger all info on aliexpress, but it does suggest that it can be wired star or delta, and a 6-pin connector on the spindle brings out each winding separately, and that the coil voltage is 220/380.

OP - Might be worth posting a photo of the electrical connector on the spindle.

IME if Spindles or motors can be wired both 220/380v the plate will state it. ie like the Coloumbo does. In this case can only go off what the plate says.
But it wouldn't hurt to have pic of the terminals for clarity.

Also if Ali express shows bugger all info how can it suggest Star -Delta.?

[Doddy]

Also if Ali express shows bugger all info how can it suggest Star -Delta.?

Various adverts give nothing like the amount of technical detail that I'd like, however, most, do clearly state the two voltage options, and a close-up of the 6 pin connector.

e.g.

http://www.chinaseniorsupplier.com/M...tificiate.html

[magicniner]

http://www.han-qi.com/products_detai...ductId=91.html

no data sheet so it could be available in both

[JAZZCNC]

They show 2 different PDF. One for the 220v another for 380V which suggests it's not dual voltage which is changable via usual methods. Also there is no Star Delta connection on the connector which also backs this up.

[Clive S]

I'm keeping out of this one on the grounds that I have had a drink

[JAZZCNC]

I'm keeping out of this one on the grounds that I have had a drink

Never stopped me so go for it.!!. . . . Do your worst. .

[HipoPapi]

Hello guys and thanks for the input.

We have taken some more images attached below.

Also we have removed the new spindle and re installed the original colombo the CNC came with just to see if we still have this irregular speed issue.

The colombo spindle seems to be spinning fine with just about 3-4 hertz up and down movement on the VFD. But we seem to have a new problem .... when starting a G-code the spindle will spin up to the specified S value in the code, but as soon as the axes start moving the spindle will go to maximum speed. We have reloaded the original XML data into mach3 to have the same settings as when we got the machine but all the same. Any input on this would be greatly appreciated.

Since the colombo isn't usable until they fix the threads on the chuck will have to try and set up the new Chinese spindle.

Please see the wiring pictures attached. If you need any more specific ones please let me know.

Also this current issue with the colombo highlighted some serious dangers that minor software issues can cause. We had incidents before when an apprentice spun the spindle with a tool not intended for that code and well.... the tool was flying across room in pieces as instead of 5000 RPM it was spinning at 18000 RPM. So if someone could explain us how to control the spindle straight from the VFD instead of going through Mach3 that would be great as a backup option for the future. We have a smaller machine on which we control the spindle from the VFD and although it takes a bit more time it might be safer.

We still don't know if we have a star or delta connection but hopefully the attached pictures shed some light on that.

Again thanks for all the help and have a great weekend.

BoX.



The Plug that supply's the whole system:



The Colombo wiring:



The new Chinese spindle wiring:





Photos of the inside wiring:

[JAZZCNC]

Ok well the chinese spindle is wired Star(380v) so you need to change it to delta. This will cure your speed problem.
Remove the screws and those gold jumpers can be changed around. Set them like the pic.

Regards the Speed changing when code runs then are you 100% sure the code isn't changing the speed.? Other than that then would need to see the XML to make sure spindle is set correctly.

Regards the VFD Speed then unfortunatly it's one or the other. Yes can make speed adjustable from VFD with quick parameter change but you will lose external control via Mach3.