Feed Rates and cutters for wood panels

[GEOFFREY]

You most certainly implied that Ger21 was wrong IN YOUR POST no 35. G.

[jimbo_cnc]

I have already mostly explained this, but let me expand.

first, post 33, which is what I though Jazz was on about.

When I say "As I understand it, I'm below corner speed even at max feedrate, so I have full torque available." That's a qualified statement, "As I understand it" means just that, but it also implies a lack of certainty. That lack of certainty is because it's not my domain of expertise and I'm questioning what someone else is saying.

When it's in my domain of expertise and I'm confident I will just state outright "This is how it is"


Post 35.

I can see how you might read that as me saying Ger21 is wrong. But try this for size: It's a link to a document that says something, and below it is a summary of what that page says. It's not me saying that.

I suppose it comes down to attitude, if you want to see that as me telling Ger21 he is wrong, go ahead. You could instead choose to see it as me probing for the correct answer, with proof.

I'm not sure what else I could have done. Someone on a forum, who I know nothing about, states something contrary to all the previous information I've seen. What would you do? just accept it?


I suspect Ger21 understands all this, maybe he's had to explain to lots of people that corner speed is not normally applicable (or whatever the answer is, I still haven't got to the bottom of this one). Or maybe he just works in an environment where asking for evidence is not taken as a personal insult.

[jimbo_cnc]

I haven't received my torque curve yet!

But in the meantime I've done some more thinking about acceleration and realised that torque fall off with speed is not a big problem anyway, at least for cutting profiles on wood. For the design case mentioned elsewhere of maintaining feedrate on curves, the acceleration is out of phase with the velocity, which helps a lot.