My name is Chris and I am a CNC noob :-) I am setting up a 3 axis router and am getting along nicely, in the build but since I am using random second hand steppers from a commercial printer, I am having difficulties with the run time performance of the steppers.
I have an Aerospace 4 axis controller that appears to be a pretty good build (ebay store easysupply) but it has dip switches to select the step configuration for each axis. What I am trying to figure out is: What do I set them at? This board supports up to 1/16 microsteps. This router will mainly carve pink foam for detailed casting patterns. Once I pick a setting for this, how does that translate to the axis settings "Driver Microstepping"? Does 1/16 = 16? The motors I have are minebea 23lm-c712-xxx. My understanding is that these are 1.8 degree, bipolar steppers. They ohm out at 1.2ohms per phase. I am driving them at the 75% current setting on the board, supplying the board with 28VDC from a nice switching power supply rated at 7.5A. I am using the default motor timings from the L297 default selection because I haven't a clue what to set them to. My latency setting is 10000 based on rounding the latency tool up to the nearest 1K. The symptoms are that the coarse feed moves are smooth and seem to work fine (though with less torque than I expected). The fine g-code steps just make the motors sit there and vibrate. Experimenting with the stepmodes made the system make some really exquisite squeals and vibrations, so I thought I might better ask a question or two before I hurt myself :-) Leadscrews are 2 start 16tpi (so effective 8tpi?) for the two axes that I have working now. Thanks for your attention! ChrisK ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
