Irregular Spindle Speed

[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.

[HipoPapi]

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.

Thanks Jazz it makes a lot more sense now. Will wire the spindle to delta on Monday and give it a try.
Regarding the speed change I am 100% sure that the speed does not change during the code as we have used an old code also we dont have a tool changer so we keep spindle speeds constant for each individual code.
Regarding the XML File would be glad to share it with you to take a look as we are unsure about its correctness specially when considering the fact that the support doesn't know mach3 and claim that the guy who set up our machine has left the company :) That makes me wonder if there was a lot of thought put into motor tuning.
Will only be able to share the XML data on Monday but thanks for the help.

BoX

[Clive S]

Just a thought check to see if the motor is running in the correct rotation when done. If it does not you will have to swap over any of the 3 phases.

[HipoPapi]

Thanks Guys,

Just to make sure although it might be a dummy question, but do we remove the back cover on the chinese spindle to do the re wiring as that does not have an electrical box on the outside. So my guess is that is somewhere under the cooling fan assembly.

Will be uploading the XML data later today.

Thanks

[JAZZCNC]

Thanks Guys,

Just to make sure although it might be a dummy question, but do we remove the back cover on the chinese spindle to do the re wiring as that does not have an electrical box on the outside. So my guess is that is somewhere under the cooling fan assembly.

Will be uploading the XML data later today.

Thanks

Ok well seeing this post made me look at pics again because thought you'd posted pic of inside box but know realise it was Columbo box and I'd seen wrong. So unfortunately I think it's like I orginaly feared and the Spindle is 380V Only unless you can find some connections on it some where. They should be obvious so if not then doubt it can be changed.!!

[HipoPapi]

Thanks Jazz,

Well that is bad news on multiple levels. It shows the sort of support we have, and will have to wait for a new spindle but at least it also shows that however dumb a question it is still worth asking :)

Regarding the Mach3 anomaly I have uploaded the XML file. In short what is happening is the following:

Spindle ( colombo) starts at normal speed but as soon as the axes start moving goes to its maximum speed (18.000). When the program finishes mach3 turns the spindle off normally. So there is communication but something is wrong.

Also here are some shots of the Chinese spindle. If you have any idea of how to rewire it please let us know.







I have uploaded the XML as a txt as that is the only way the site lets me upload it. Please just change the extension to .xml

Thanks again for all the help.

BoX

[HipoPapi]

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.

Just one more thought as I am a bit more confused now. Since you have thought the wiring posted was the Chinese spindle wiring although it was the colombo that makes me think they are both wired 380V so that would mean the speed issue lies some other place. Please correct me if I am wrong.

Thanks
BoX

[JAZZCNC]

Just one more thought as I am a bit more confused now. Since you have thought the wiring posted was the Chinese spindle wiring although it was the colombo that makes me think they are both wired 380V so that would mean the speed issue lies some other place. Please correct me if I am wrong.

Thanks
BoX

Yes your thinking is correct. This is why I asked you several posts back to check the Supply voltage. If that pic is the columbo wiring then it's wired Star and 380V so your supply must be 3 phase 380V.
In which case the chinese spindle should work and I'm not going to be able to suggest anything more than have done already ie: check wiring etc and test the 0-10v is working correctly.