nanoDLP

lenne0815

Member

Registered: 2017-05-17

Posts: 38

Custom Exponential Acceleration for Z Moves

I think the title says it all

You have solved nearly every area where big gains in print speed could be achieved ( Time to display, calculators, usability )

This is the last man standing imo.

(might only be achievable with a pi daugtherboard, unsure how the arduino based controllers would react to it given that they already employ acceleration values )

Last edited by lenne0815 (2017-05-30 10:14:31)

Shahin

Administrator

Registered: 2016-02-17

Posts: 3,541

Re: Custom Exponential Acceleration for Z Moves

Good idea for direct control.
There are two ways to handle acceleration.
Realtime pulse length calculation, providing realtime formula calculation will effect performance.
Pre-calculated pulse length. Increase early delay and memory usage to handle formula.

Will try implement this.

lenne0815

Member

Registered: 2017-05-17

Posts: 38

Re: Custom Exponential Acceleration for Z Moves

So much thanks !

I thought about other ways of doing it "manually" but nothing came to my mind quickly

Maybe real time is feasible as we only move a single axis between to fixed points, but precalculating while slicing could work aswell, for the calculators we would need the possibility to tie the accel "rates" to [[buildarea]].

Is there a certain daughterboard you recommend for using with pi and Nanodlp ?

Last edited by lenne0815 (2017-05-30 17:20:55)

Shahin

Administrator

Registered: 2016-02-17

Posts: 3,541

Re: Custom Exponential Acceleration for Z Moves

I have not used one, maybe somebody else could offer advice.

lenne0815

Member

Registered: 2017-05-17

Posts: 38

Re: Custom Exponential Acceleration for Z Moves

I found this guy here: https://plus.google.com/100170060322292 … KC5ueGNPbZ that looks really promising !

lenne0815

Member

Registered: 2017-05-17

Posts: 38

Re: Custom Exponential Acceleration for Z Moves

For calculating Realtime maybe it lessens the burden on the pi if you break up the exponential function into maybe just 5 hard points, that should be sufficiently precise for a very smooth peel and a just as smooth stop after retract in the vat for the next layer.

Shahin

Administrator

Registered: 2016-02-17

Posts: 3,541

Re: Custom Exponential Acceleration for Z Moves

Have you tried custom speed control?