Adding a 4th axis spindle to my mill, servo troubles

[Davek0974]

Exactly that - 3000rpm, 10v.

300rpm/v

[m_c]

Exactly that - 3000rpm, 10v.

300rpm/v

The drive is probably not seeing the full 10v. Try bumping the rpm/v up a bit

[Davek0974]

Tried that now, apart from altering either the top speed or the acceleration ramp depending on which way i tweaked the ramp, it made no difference at all - still get the increasing error count above 2990 rpm

[Davek0974]

Ok,

Using my bench PSU it was giving 2965rpm one way and 2971rpm the other.

It was also creeping with the inputs shorted out.

I ran the auto zero speed set function which killed most of the creep.

Then adjusted the gain to 305rpm/V

It now gives 3000rpm forwards and backwards.

Did it fix the issue?

No :(

A short video of the Pid screen at 2990rpm and 3000rpm

https://youtu.be/i7GEe7jAoY4

[magicniner]

Motor slip ;-)
Most servo spindle controllers have a switch-over speed from Positional to Speed between 2000rpm & 3000rpm

[Davek0974]

But what can i do about it?

[magicniner]

It should be covered in the user manual, parameter manual or commissioning manual for the drive.