Centroid Community CNC Support Forum

The main difference is that the Oak is a closed-loop controller (it reads encoder feedback from each axis) and can run analog drives (e.g. velocity-mode or torque-mode control) as well as position-mode drives. The Acorn is an open-loop controller which cannot read or use encoder feedback from the ...

what kind of servo drives are they?

Acorn is a step and direction based cnc controller. the drives would need to accept step and direction signals to work with Acorn.


The servos are Meldas MDS-B series. I'll have to look at the motors part numbers, but I think they are 2kw for X/Y and 4kw for ...

Hi,

Can it really do 4 axis? Some people online say yes, but the documentation says it will only do 3.
<yes on 4 axis, (where did you see documentation saying only 3?)>
https://www.centroidcnc.com/centroid_diy/acorn_cnc_controller.html
It says 3 axis simultaneous where I want 4 axis simultaneous ...

I bought an older VMC and it has a Meldas 520M control. I am wondering if the Acorn is going to be capable of replacing this so it is not a downgrade. My primary reason to change is the old control has limited data / buffering capabilities and high speed movement get very jerky as the drip feeding ...

The distance from the server room is about 100m, or 330'. When the ground thaws, I will lay the fibre and I will know what the latency is. I expect about 2-3ms round trip, so certainly no worse than an average PC.

A year or so ago I virtualized and recycled a whole gaggle of PC type hardware. Power ...

I've sifted through pages of posts, but I haven't found too much on the actual ethernet link used by the acorn. It would seem that centroid wants us to direct connect without any other devices in the middle. The reason hasn't ever been clear, except maybe that they just picked some static IP ...

I think the problem was really getting the ADC values into the milling program so maybe I could look at a PLC type solution to trigger a fault. You can expect that torque will be up and down a lot through different operations, so I was hoping to correlate it with the actual instructions being run ...

My servo drivers can all output torque. I was thinking that this would be interesting if I were to run multiples of the same part. A sudden change on torque (spindle or otherwise) would signal that something bad just happened (broken tool or otherwise). Is there any way to get a torque input into ...

Does the homing file allow conditionals? In other words, if switch is X then do Y, otherwise do something else?

I read the entire thread. I was wondering what happens when the acorn tries to home but already has an active home switch signal?

I was thinking of setting up a home signal at the machine origin and using the actual machine limits to trip a hardware fault in the Minas A4 Panasonic servo ...