Hi Rob, I've used my ELS for all sorts of non-ELS projects. Especially since the original had a 3A 55V micro stepping driver on board. Or it could drive external motors. For the longest time it was the power feed for the knee on the mill driving a Gecko and a 1000 oz-in motor with 3:1 reduction.
I've also used it as a rotary table controller. Once you set up the distance per single step jog it's easy to mount something in the table and each jog moves to the next drill position. Beats the arms and pin of a standard rotary indexer. Oh and then a coil winder. Tell it to cut a thread a certain length and the stepper motor turns a repeatable number of turns. Bingo. N windings on the coil form. And of course as the Z axis controller on my South Bend for threading and boring to a repeatable stop. I've done a few things to 'enhance' my ELS. First I ported the code which was incredibly easy to a PIC32 from the PIC18. The time spent inside the interrupt routine which includes the micro-stepping control went from just over 35uS to about 3uS. I wasn't able to plug in the PIC32 that I wanted into the Automotive Networking Board I used for development but a full quadrature encoder will now be possible instead of a single pulse per rev. I can send you some pictures off list if you want. The plan was to make a small piggy back board that plugged into the 40 pin DIP socket of the PIC18F. But with the power of the PIC32 and a second DB-25. But I also got side tracked from that with a TI dual processor and floating point math units; the F2837xD. https://www.ti.com/lit/ds/symlink/tms320f28378d.pdf I was just at the point where I was looking at wiring it up as a replacement for the ELS when work-work got in the way. Since then it's sitting at the back of the bench and other projects involving the Beagle surfaced again. I almost have a CANopen stack written for it too. One could spend years just playing with it. Now I've forgot most of what I was doing with it. The pocket beagle also looks interesting. Too many projects. Not enough time. John > -----Original Message----- > From: Robert Murphy [mailto:robert.mur...@gmx.com] > Sent: June-12-21 12:30 AM > To: Emc-users@lists.sourceforge.net > Subject: [Emc-users] BeagleBoneBlack > > > Hi John, > > With regards to the BBB I was running MK (wheezy) on using the PRU, > which for my needs seemed to be ok, I didn't notice any graphics issues. > > The thing that turns me off MK is how it's split and so forth. > > The reason my interest has piqued is because I have a project on the go > that the BBB would be perfect for. I have a mini table saw that I'm > setting up to cut PCB sleepers for a model railway I'm building. Each > sleeper requires a few cuts, for very precise ones just enough to cut > through the copper. > > What I was thinking of is a simple GUI control the position of the > fence, and hooking a ESP32 (via ethernet) to do the motion > control.....There is a discussion on the forum regarding this. The code > is very experimental the moment but I think it could just work. > > Currently the Mill is controlled by a MESA 7i92 connected to 7i76, 7i73 > and a few other cards. This is all hooked up to a Odroid H2 plus. > > If the BBB isn't a viable solution I have a x86 based Atom Pi and a > RPi400, so a couple of options. > > The ELS sounds interesting having just built a "parts bin special", a > Myford ML7 bed (the bed is almost unworn) and a Super7 head stock (no > back gear, but the vfd should help) and various other S7 & ML7 parts > (complete ones are at stupid prices Down Under and many are rusted and > incomplete). So I guess adding a few steppers and ballscrews shouldn't > be too much of an issue. > > > Cheers > > Rob > > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
