Brother TC-211

mblaszkiewicz wrote: Well making chips today (wood) I will post a pic when its done in a few hours. The only issue is the speed. The machine is running slow. Only about 60 ipm. I have it programmed for 150 ipm.

I wonder if it is

[DISPLAY]
...
MAX_LINEAR_VELOCITY = 1.000000

That would be 1 inch per second = 60 ipm. (Though I don't think it should be that, it's easy to change to find out)

Well thanks again Andy. Speed is up to 600 ipm. Also here are the first to pieces I did as tests. Just real rough carvings.

image missing http://i1357.photobucket.com/albums/q757/mblaszkiewicz/20141012_115214_zps4a201dd3.jpg

image missing http://i1357.photobucket.com/albums/q757/mblaszkiewicz/20141012_115234_zpsa18cabfb.jpg

And a little video

vid1357.photobucket.com/albums/q757/mbla...5900_zps740880a4.mp4

Well can't get the video to show. If a mod could fix the link please

Nice!

high IPM is just an awesome time-saver, even if not cutting at high IPM. IMO, most mills are limited to 5-8k usable rpm, and a smaller machine such as yours would be happy with a 3/8" EM @ 0.030" stepover 0.5" DOC and 200-300ipm cutting alum, steel might need a tad less step-over, still keep the IPM high and engagement angle low on the cutter. I would really like to know how your setup handles higher IPM cutting.

You must have 780 ipm max velocity. Do you need this really, I would decrease to 600 ipm, although these machines can up to 1800 ipm. But if you make the first part, that speed is much to high, if you have a fault, you haven't any chance to stop the machine before the crash.

1800ipm on an old (1990 at the latest) dc servo system? doubtful but good point, unless the servo drives do all the work regarding controlling the servos and the new control acts like the original. Otherwise I would expect some serious jerking, drifting, or lag.

Not to mention these are 25 year old brushed DC servos.... you dont exactly want to be arcing the hell out of those.


This brings up a Lcnc question here, does the control wait for all axies to reach the "in position" window before continuing to the next line?

scubasteve1 wrote: This brings up a Lcnc question here, does the control wait for all axies to reach the "in position" window before continuing to the next line?

No, but yes

it looks like that, but that isn't what really happens. The trajectory planner sends a new position command 1000 times every second. Those commands are calculated to keep all the axes in synch.