Irregular Spindle Speed

[HipoPapi]

Hello there,

Any thoughts on which wires we have to check for the 5v or 10v constant power also have you managed to take a look at the xml file.

Also has anyone got any experience using NCstudio as the Chinese support thinks that that would fix our problem and if nothing else works out we are willing to give it a go but would be good to know how it compares with Mach3. We are used to mach3 as we have it on the other machine as well and love the flexibility it offers.

Thanks again.

Box

[JAZZCNC]

Ok the wires you want to measure are ACM and V1. I suggest you try this at the board with wires removed. Then at the VFD end to verify getting same voltage.

To test Put meter black Probe to ACM and Red to V1 then command a speed of half your MAX spindle speed. It should read 5v or very close.

The spindle is using pulley #4 in Mach which is to 12000rpm this means mach will scale the output 0-10 voltage from this. IE: if you command 6000rpm it outptus 5v and if 12000rpm then 10v but commanding 18000rpm will just get you pulley ratio warning.
So if your spindle MAX rpm is 18000 then setting pulley ratio #4 to 18000 means mach will scale the output so 10v is given at 18000rpm.

I've looked at the spindle setup in Ports&pins and it's turned on but without more details of the Spindle board then can't say if correct or not. Looking at the Spindle Output in Motor tuning I would say it doesn't look like it's setup correctly but like say need to know more about spindle board to be sure.

Testing the 0-10v voltage will give you best clue if it is or not.