forget color wrote: > Hi, > > I'm in the process of building my first CNC using the 'jgro' design on > cnczone. While I'll use it for normal CNC router stuff, I also intend > to use it as the base for a robotic art painting machine. This is > what led me to emc2, so that I can modify it as needed for my > application. > > I've got a couple questions to help me move forward. > > First, I need to select a drive/motor system. I had been looking at > the HobbyCNC kit, but noticed in the archives and on the wiki that it > looks like some people have had issues with it. Is this still the > case? Otherwise, I'm thinking about the Xylotex kit. From what I can > tell that seems to work well for others. Should I be looking at any > other setup? I'd like to keep costs down, but can spend more if it > makes a difference. > There are G250/G251 drives from Gecko, which might appear superior to Xylotex. Considering you need of high customization, G540 (break out board + 4 x G250) will not suit you. > Second, down the road I'll need a system for picking up different > brushes. I'm figuring I can write some code to generate g-code that > makes all the movements I need, such as moving to where a brush gets > dropped off, where another gets picked up, where it needs to get > paint, etc. But I don't yet have any sense of the mechanism for > grabbing the brush. I want something simple and inexpensive. Any > suggestions? Also, when I get a drive/motor kit, should I get a > 4-axis kit and use the 4th axis and 4th stepper for controlling the > grabbing mechanism? Or would that be done some other way? > > You probably should look how tool changers are implemented. Imaging a wheel with small rings, holding brushes. To change tool (brush), you rotate the wheel so that empty slot appears it the well known location, drop current brush into the holding ring, rotate wheel so that new brush appears in the needed location and pick it up. To make all this easy, you probably need to make all your brushes have same tails and carry some slip which will set the height of the brush in both toolchanger and in the arm. > Thanks! > fg > > ------------------------------------------------------------------------------ > Open Source Business Conference (OSBC), March 24-25, 2009, San Francisco, CA > -OSBC tackles the biggest issue in open source: Open Sourcing the Enterprise > -Strategies to boost innovation and cut costs with open source participation > -Receive a $600 discount off the registration fee with the source code: SFAD > http://p.sf.net/sfu/XcvMzF8H > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users >
------------------------------------------------------------------------------ Open Source Business Conference (OSBC), March 24-25, 2009, San Francisco, CA -OSBC tackles the biggest issue in open source: Open Sourcing the Enterprise -Strategies to boost innovation and cut costs with open source participation -Receive a $600 discount off the registration fee with the source code: SFAD http://p.sf.net/sfu/XcvMzF8H _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
