On 12/26/2015 07:59 PM, Neil Whelchel wrote: > Hello Jon, > It is not a retrofit. MyData has used Linux since about 1993 on all of > their machines, WOW, I'd never heard this! > for a short time before that they used Xenix, but the Xenix > versions never worked well. I have heard there were problems with the older MyData machines just going crazy sometimes. > The software is called TpSys, it is a > collection of C, Perl, and bash programs, about 300 of them. The design is > fantastic and well thought out. They are also extremely reliable, and > stable both hardware and software. > Here is a video of someone setting up a machine, this video is one of the > few that allows you to see the UI. > https://www.youtube.com/watch?v=UdJxuux0r28 > Here is a video of the machine in action. The red flash that you see is the > up looking camera. It looks at the parts that the 9 vacuum tweezers > (nozzles) are holding as they move past to make a precise measurement of > the locations of the pins on the parts so that it can calculate the > position offset and rotation of the part when it places it on the board. > These machines typically place pins to within 0.0005 inches. Hmm, that sounds really GOOD! I think my repeatability is probably closer to .005" or so. Just BARELY good enough for anything finer than SOIC lead pitch. > https://www.youtube.com/watch?v=M-aWoHl6pyM > I have extensive experience with these machines, I am happy to answer any > questions that you might have about them, but I am not sure that this is > the right place to have this conversation unless the rest of the Linuxcnc > developers are interested in listening in on this tangent... Some may be interested. Anyway, I already have the Philips CSM84, and will stick with it until something major breaks. Then, I'd have to consider what to do next. Retrofit or a whole new (used) machine. > But since we are here, I will put in my 2 cents worth. > I have been following the OpenPnP project for some time, and as far as I > can tell, they have some (extremely) good ideas, but they are headed in the > wrong direction. It is not likely ever going to be in a position to be a > good retrofit tool for anything, it will likely only work good on hobby > machines. Yes, you seem to have the same view as me. > The entire concept of using G-code for a PnP machine is not a good idea on > any level. Right. It is what is there, but not a proper fit to the task. > However, Linuxcnc can help here. You can control Linuxcnc > directly with its Python API, so it would be a good match to use Linuxcnc > to handle the realtime robotics and IO, but the PnP logic would have to be > created. If someone were to do this (properly), such a project would be a > likely retrofit for old PnP machines. > Yes, this makes a lot of sense. If Linux/HAL/Python was handling all the motion-level stuff, it could make a PnP program with extensive error recovery a much smaller project.
Thanks, Jon ------------------------------------------------------------------------------ _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
