Marshland Engineering wrote: >> On the other hand if your servo drives require a +/- 10VDC analog input then >> it is hard to beat this combination in my opinion: a Pico >Systems PPMC >> motherboard with a DAC, ENC, and DIO running off of an Intel D510MO. >> I am delighted with mine. >> > > The above looks like the way to go for me. > > I have the old servo dynamics analog cards which I can reuse. (I wanted to > use the UHU cards we built up but I'll keep that for the next project) > > My current mill only energises the drives when in Run or Do One mode. All > other times the drives are off. What must happen with manual feed is the > actual positions need to be updated so when you put it back into Run mode the > drives don't shoot off to the last position. (PS I have a manual encoder on > my CNC lathe but it's no replacement for hand wheels.) Both my lathe and > current mill have encoders on the motor and on the table for each axis. > With EMC2, and my hardware, you can switch back and forth between manual and CNC by pressing a button or two. But, CNC is so good, I just really don't feel the need to have the manual function at all. When in the CNC mode and out of E-stop, the drives are energized all the time, and are constantly holding position, even if the G-code program is finished, or your are in CNC-manual mode. Jog keys or a jog encoder (MPG) can be used to move the machine. When you go to E-stop, the encoders still record position, and EMC constantly updates the actual position as the commanded position. So, when you come out of E-stop, it just holds position at the last place you moved it manually.
If you build a pendant with an MPG, you will probably never touch the handwheels again. (On the other hand, my main machine tool, a converted Bridgeport, doesn't have handwheels, so I couldn't use them anyway.) But, I am really comfortable machining all sorts of stuff using either jog jeys (for constant feed rates) or the MPG (for moving around and touching off with feeler gauges and edgefinders.) > If I can do the above, then you will have another EMC contributor. > > The only other thing is, we have a lot of CAD software in XP and I would like > to be able to have EMC2 and XP running at the same time. > There is VMware, but I have no idea if it runs on the RT kernel we use. I have about 5 computers here for various tasks. I use VMware to run both Linux and Windows 2000 on my desktop, but don't do that on the computer that runs the machine tool. > Often when modifying a one off part, we use the hand wheels and then find the > engineer left a measurement off the PDF drawing. We need to be able to > quickly load the DXF and do the measurement to continue. > There may be network ways with programs like VNC to do what you want, such as run a CAD/CAM application from a remote computer. EMC should be perfectly compatible with that. Jon ------------------------------------------------------------------------------ The ultimate all-in-one performance toolkit: Intel(R) Parallel Studio XE: Pinpoint memory and threading errors before they happen. Find and fix more than 250 security defects in the development cycle. Locate bottlenecks in serial and parallel code that limit performance. http://p.sf.net/sfu/intel-dev2devfeb _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
