On Tuesday 09 April 2019 05:53:41 andy pugh wrote: > On Tue, 9 Apr 2019 at 02:54, Gene Heskett <ghesk...@shentel.net> wrote: > > You also mentioned that the driver isn't available, is it still > > being (re)written? > > Hardware driver ( IRAM256-2067-A2 ).
That does tend to drop a wrench in the gears. :( > The software side of things works > really well. > (plug the STMBL into a Mesa smart-serial port, velocity / position > command and feedback HAL pins appear automatically) Something like the 7i76D does when plugged into a 5i25 with the right firmware loaded. I am finding that works quite well once the power supply's for regular 5 volts and field power is rigged, along with a couple eurostrips for that power distribution. It has 32 inputs and 16 outputs for utility use, and I'm up to around the 8th input and 3rd output so far, so there's all sorts of room for expansion yet. I've skipped the 1st 4 inputs because they can also do 8 bit a/d conversions. Who knows what I might come up with that uses those in the future once I have used this thing for a while. Might even rig a keep my coffee warm accessory. :) Or a tool changer. I'll admit thats been wandering around in the back of my mind. I rather like the idea of the gator sockets on a carousel, driving the carousel with the mills motors to loosen and tighten the ER chuck on this spindle motor while locking the spindle by its double d flats with a solenoid powered wrench. Bigger carousel=tighter ER nuts. Some sort of a geneva drive to position the carousel to the next tool driven by a small windshield wiper motor, using its internal switch to count tool pocket positions. But gator sockets are getting rare, a fad thats fading? Properly timed regular sockets would even work better, 6 pointers for long life. Maybe even machine the sockets right into the carousel disk. I can do that on the G0704 easily enough. But then how do I synch the spindle with them, which is probably why the hackaday version used gator sockets with their built in springs. Highly failure prone IMO. The only thing I can think of ATM is to take the minimum speed back out of the spindle driver and hit it with a second or so of 2hz to make it "find" the socket. I've never used the spindle orient function so no clue if that could be used with a vfd. That would obviously need a 1 slot/rev encoder, a needless bit of complexity. Problem to be solved by experimentation. I can't see the mechanical complexity of vertically spring loaded sockets, which is what the gators are in effect. Ideally, a signal from the vfd that a locked rotor has occurred, stop the descent, at which point give it a short burst in the other direction to free it up in case its wedged, and continue lowering the tool into the empty socket. Complicate the control to simplicate the mechanics should be the plan. Another question TB answered is how much room below the tool should a second disk be put to stop it from completely dropping the tool. This could be used to establish a consistent Z offset. I can also see a need to rehome the XY after a tool change in case a motor looses a few steps tightening the nut. See what happens when i let my imagination out to play w/o a chaperone? And I'm still on my first cup. :) But the idea is to spread potentially usefull ideas. My TANSTAAFL contribution if its usable to anyone. > Unfortunately without the power driver IC that is all that happens, no > motors turn. I guess you could use the analogue inputs and digital > outputs for something ;-) And whats the suggested workaround? Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
