one last - I swear.. ;) https://www.youtube.com/watch?v=Z_LxyosF2yc
sam On 7/15/2013 5:42 PM, sam sokolik wrote: > one more.. > > https://www.youtube.com/watch?v=_7skJhKzU7Y > > Dad is having too much fun... > > sam > > On 07/11/2013 08:43 PM, sam sokolik wrote: >> quick threading video.. (yes - not the correct cutter - and the exit >> move is a bit shallow.. but shows the spindle sync is right on...) >> >> https://www.youtube.com/watch?v=ERMizV-yy8U >> >> sam >> >> On 07/11/2013 02:56 PM, sam sokolik wrote: >>> Seems to run nice at 40ipm >>> >>> http://electronicsam.com/images/emco/EMCOThreading.JPG >>> >>> video soon... >>> >>> >>> On 7/9/2013 11:34 AM, sam sokolik wrote: >>>> ok - some cool news I think. So - with the switch on the interface >>>> board set to off (non step/dir mode) the control signals are 4 phase >>>> drive. (seems to be unipolar). pins 2 through 5 control one axis - 6 >>>> through 9 control the other. I hacked a hal file to setup stepgen to >>>> output 4 phase (patterns 5 through 10). >>>> >>>> First tried pattern 9 (Unipolar Half Step) because the scale was setup >>>> for that. >>>> the performance was the same. 20ipm max and would probably have to back >>>> that off... >>>> >>>> Second was pattern 10 (Bipolar Half Step) I know - not likely - and it >>>> wasn't. Didn't like it. >>>> >>>> Third was pattern 5 (Unipolar Full Step) I halved the axis scales also. >>>> similar performance.. 20ipm max. (and sound so far was pretty crappy) >>>> >>>> fourth was pattern 6 (Unipolar Full Step (two windings on)) >>>> Holy crap. That sounds nice. maxed out at 30ipm and didn't try any >>>> faster. Full stepping is .00054ish per step. Workable for sure. >>>> >>>> That is what the original control/software maxed out at. I will try >>>> faster when I get a chance. >>>> >>>> That is totally usable with linuxcnc - no mods to the control. I need >>>> to hook up the index and 100ppr and try some threading! >>>> >>>> One thing to try is - I think I can put the interface board back into >>>> step/dir and full step. I don't know what pattern it does though. >>>> >>>> sam (happy dancing..) >>>> >>>> >>>> >>>> On 7/8/2013 7:13 AM, sam sokolik wrote: >>>>> We got a few of these lathes from a local school. they are cute little >>>>> cnc lathes. >>>>> The technology is pretty old though. The steppers are 72 steps per rev. >>>>> >>>>> I found this >>>>> http://www.maxton.com/ebay/emco/EMCO%20Compact%205PC%20Conversion%20to%20Mach3.pdf >>>>> >>>>> which talks about converting to mach. They remove the octal latch and >>>>> jump through it. >>>>> I wanted to see if I could get linuxcnc to drive the board without >>>>> hacking the latch out. >>>>> >>>>> this is what I have found/figured out >>>>> >>>>> I think this is correct.. (this is with switch 1 on the interface board >>>>> set to >>>>> 'on' which puts the board into step/dir) >>>>> >>>>> x step pin 2 >>>>> x dir pin 3 >>>>> z step pin 4 >>>>> z dir pin 5 >>>>> index pin 12 >>>>> estop pin 11 >>>>> 100 ppr sensor pin 10 >>>>> 74ls374 enable pin 14 >>>>> 74ls374 clock pin 1 >>>>> >>>>> I setup linuxcnc to send a pulse at every base period for the 'clock' >>>>> that latched the outputs of the chip. (thanks Jeff E for the idea) this >>>>> is using the >>>>> 'reset' option of the printer port that allows for a cycle within each >>>>> base period >>>>> the same feature that makes 'double step' work. This allows me to >>>>> 'latch' the >>>>> 74ls374 each base period with the current step/dir pattern. It seems to >>>>> work >>>>> >>>>> Now it took me a bit of tinkering to figure out that I didn't read the >>>>> above article >>>>> well enough to notice that you needed to set a switch to put the emco >>>>> interface >>>>> board into step/dir mode. During this time I was flipping bits on the >>>>> printer port >>>>> to try to figure out why it wasn't working. I think by default the >>>>> interface is setup >>>>> as phase drive. (4 phases per stepper) as I think I was flipping all 8 >>>>> data bits on >>>>> the printer port and was getting stepper clunking. >>>>> >>>>> Well - the performace of these drives/steppers are pretty poor. (assuming >>>>> I have the timing right - and I didn't get too much time to play with >>>>> it.) In the >>>>> above article they talk about around 20ipm is about max. That is what I >>>>> was >>>>> seeing - plus there is a weird interaction when you run both axis at once. >>>>> (they get quite a bit noisier for some reason). Now it could be that I >>>>> don't quite >>>>> have the timing correct - like maybe the step/dir needs to be inverted or >>>>> or something - I will play with it more. >>>>> >>>>> I would also like to switch it back to non-step/dir mode. (phase drive >>>>> maybe?) >>>>> because there might be a reason the original software used it.. (better >>>>> performance?) plus I think I have the original software and would like >>>>> to try >>>>> it out also. (need to setup a pure dos machine to test) >>>>> >>>>> lathe >>>>> http://www.electronicsam.com/images/emco/emcoclose.JPG >>>>> interface/drive >>>>> http://www.electronicsam.com/images/emco/interfaceanddrive.JPG >>>>> >>>>> sam >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> ------------------------------------------------------------------------------ >>>>> This SF.net email is sponsored by Windows: >>>>> >>>>> Build for Windows Store. >>>>> >>>>> http://p.sf.net/sfu/windows-dev2dev >>>>> _______________________________________________ >>>>> Emc-users mailing list >>>>> [email protected] >>>>> https://lists.sourceforge.net/lists/listinfo/emc-users >>>>> >>>>> >>>> ------------------------------------------------------------------------------ >>>> See everything from the browser to the database with AppDynamics >>>> Get end-to-end visibility with application monitoring from AppDynamics >>>> Isolate bottlenecks and diagnose root cause in seconds. >>>> Start your free trial of AppDynamics Pro today! >>>> http://pubads.g.doubleclick.net/gampad/clk?id=48808831&iu=/4140/ostg.clktrk >>>> _______________________________________________ >>>> Emc-users mailing list >>>> [email protected] >>>> https://lists.sourceforge.net/lists/listinfo/emc-users >>>> >>>> >>> ------------------------------------------------------------------------------ >>> See everything from the browser to the database with AppDynamics >>> Get end-to-end visibility with application monitoring from AppDynamics >>> Isolate bottlenecks and diagnose root cause in seconds. >>> Start your free trial of AppDynamics Pro today! >>> http://pubads.g.doubleclick.net/gampad/clk?id=48808831&iu=/4140/ostg.clktrk >>> _______________________________________________ >>> Emc-users mailing list >>> [email protected] >>> https://lists.sourceforge.net/lists/listinfo/emc-users >>> >> ------------------------------------------------------------------------------ >> See everything from the browser to the database with AppDynamics >> Get end-to-end visibility with application monitoring from AppDynamics >> Isolate bottlenecks and diagnose root cause in seconds. >> Start your free trial of AppDynamics Pro today! >> http://pubads.g.doubleclick.net/gampad/clk?id=48808831&iu=/4140/ostg.clktrk >> _______________________________________________ >> Emc-users mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/emc-users >> > > ------------------------------------------------------------------------------ > See everything from the browser to the database with AppDynamics > Get end-to-end visibility with application monitoring from AppDynamics > Isolate bottlenecks and diagnose root cause in seconds. > Start your free trial of AppDynamics Pro today! > http://pubads.g.doubleclick.net/gampad/clk?id=48808831&iu=/4140/ostg.clktrk > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > > ------------------------------------------------------------------------------ See everything from the browser to the database with AppDynamics Get end-to-end visibility with application monitoring from AppDynamics Isolate bottlenecks and diagnose root cause in seconds. 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