Feed Rates and cutters for wood panels

[Ger21]

Look at a chart from a motor manufacturer. They don't look like the one from Gecko.
Torque starts dropping immediately.

[Jonathan]

At very low speed the torque is approximately 2/3rds of the rated holding torque. The then gradually lowers from that value then quickly drops off at the corner speed.

[jimbo_cnc]

The first chart from the first hit on google looks a lot like the gecko chart :)
http://www.orientalmotor.com/product...-only-1-8.html

But I see many different characteristics, so yes, new torque model needed before I look at power and stall.

[Ger21]

Yes, 60oz motors have flatter torque curves. But we don't use those.

[JAZZCNC]

Yes, 60oz motors have flatter torque curves. But we don't use those.

And if you find a Chinese supplier that gives you an accurate Chart for that particular motor then Frame it because it will be a Rare thing.!!

[jimbo_cnc]

Ger21 was right about the acceleration. 0.2g would be good.
Just spotted I was putting 12A into my 4A motors!

^Am I right(that I was wrong!). What sort of current should I put in 'Set phase current' box?


It was all seeming too simple, both options were more than adequate. Now I'm down to much lower accelerations, and that's still with the optimistic flat torque model.

I've taken advantage of higher ball screw efficiency, and better value for screw inertia.

I need to program some realistic cutting operations to see if I can spot any difference between the machine options.

[JAZZCNC]

Ger21 was right about the acceleration. 0.2g would be good.

Why would you doubt some one with Gerry's experience or any of the Very experienced members here like Jonathan or me.? Also if you look again he's saying IF you achieve 0.2G.? It's not clear cut or an exact science in practise with so many outside variables playing there part.

None of Us will deliberately send you wrong, We have no reason or motivation to do so unlike some of the Machine providers but you seem very distrusting and If I'm honest I for one, having bent over backwards offering sound advice to help find it quite insulting.!

I don't understand why your not believing what's being told to you.?