Quite an Unusual one

[Boyan Silyavski]

Some small progress.

At the end i found the cable problem that was making all time my Z axis servo trip. I measure all- fine, test the machine and the Z trips. measure again all connections fine. Come on.... Eliminated connectors and stuff, and at the end it was the cable. Some times giving error some times not.


Have found proper steel box for the electronics and painted it. Soon all will go there.


These days have made some test runs and had problems with the Pokeys57CNC board. Working a test program and after 15 min or so disconnects from mach 3. Had to reinstall all, update firmware and today at the end was working fine for the moment


Another problem with this board is the Spindle speed control. This could be my mistake though to lack of understanding. I read 10 times at least http://www.machsupport.com/forum/ind...c,32353.0.html and https://www.machsupport.com/forum/in...?topic=22727.0. So i have in my pulley ratio min 1000 max 24000 and ratio 1 and at the PWM screen of the plugin 1000hz refresh and i figured 1/240=0.004667 multiplier. So the problem being is even with mach3 stopped there is 3v from board and could not be lowered using the micro, did i say "MICRO" adjusting pot. Obviously i have to do something in the VFD adjustments, other wise from 12000 to 24000 rpm works fine with that numbers. I hope i am not wrong


So i have a couple of jobs queued already and no time to play a lot. So basically i will do some jobs as it is, cables are short to use full table length but i dont need that for the mooment.


Now remember what i have always said that i will not use it to mill steel. contrary to that i decided the first ever cut to be on steel, just to check if i could surface the table :-)

Opened HSMadvisor and as i dont have here any more suitable bits i plugged a 6mm 2 flute carbide, adjusted manualy the spindle speed and gave it a go. At 1mm depth of cut though, i did not want to get overexcited on the first run:





Well, it cut it dry without problems, but a spilled a bit of oil on the table , ha ha, The misting cooler is still not ready for that machine, though i have all the parts and the tubes are on place.

About the cut. No vibrations on the machine. Perfect surface, well it seems i have trammed well the head. Thanks god. As if you remember i did it using straight edge and precision squares. I did not have Dial Indicator at that moment. Just used it later to confirm.

The cut may not look great on picture, as its magnified, but believe me-it is mirror like and scratching with finger is like scratching glass.





here is the video of the first cut. My mobile amplified the sound, its quiet in reality, but if you listen to it you will hear not any ringing or whatsoever from the machine.





I decided to stop for today as i have no water pump connected to spindle. And came here to brag a bit