Re: rough circle

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "afogassa" <afogassa@y...>
wrote:

> I think it has something to do with the look ahead, maybe it

pauses

> on short line segments enough to gouge the parts(movements gets

rough)

No, the files are 100% preprocessed. The Gen 1 controller has about
50 blocks in buffer and Gen 2 is around 200. The absolute max block
throughput is about 300 blocks per second. A block is approximately
equivalent to a line or an arc in G-code.

There was a recent change in the arc interpolation setup. If you
have downloaded a recent version and changed the circular
interpolation to lines, the setting is persistent and you may bounce
up against the 300 blocks per second.

You should only use arc to lines interpolation if you have different
leadscrew ratios on X and Y. If your ratios are the same, no linear
interpolation comes into effect and you will be able to process any
arcs at 125,000 steps per second.

> Maybe I should make the acceleration curve longer, but than, it
> slows down the milling speed.
> I'm not shure but deskcnc can not do a real interpolation, (sends

a

> pulse out for x than y than z on each pin of the microprocessor)

so

> it sends like 100pulses on x axis waits it to finish, than 100

pulses

> on y axis than on z axis, if so it would have to be alot faster

than

> it is.

No, all axes are simultaneously indexed.


Fred Smith - IMService
http://www.cadcamcadcam.com/hobby