On Wednesday 30 September 2015 09:16:23 Lester Caine wrote: > On 30/09/15 03:38, Gene Heskett wrote: > > URL's to the docs would be fine. > > Is http://i.ytimg.com/vi/7Y1-sEO2KCY/hqdefault.jpg the one you are > talking about? Relay and AxisB Direction share pin 17
Yes, that is the one Lester, thanks. The legend says if the flea clip is on, it drives the relay, with it off, its Dir for axis B. And its on. It looks like a fairly decent card, if only it didn't have the DB-25 male input that makes you buy a $25 cable from the Mach people. Male to female cables seem to be scarce in these here parts. Hence the order for a pair of F-F gender changers at <$3 ea going in last night, along with me buying the last 2 Magnate 7507 bits from Amazon. I sure hope they are sharper than the first one, as the result will otherwise need a lot of sanding to remove the "hair" the first one wants to leave while carving pine With that relay, I can run an ice cube dpdt to reverse the armature or field, and some microswitches to open at the motion limits. Each micro has a diode across it to allow it to run away from that limit when the voltage reverses. The actuator cam will need to have a wide top so it doesn't coast past the switch. With the limits, the relay just opens or closes. The 12 volts is applied full time. To get some flexibility between the output gear and the jig, a piece of 1/2" ID hose about 6" long will be clamped to the teeth of the output gear, and the jig end cut off at a steep angle so a small screw can be driven thru the tongue left, as close to the hinge pivot line as practical. Let the hose bend to take care of the diffs in axis alignment. That of course can be fine tuned when the motor is bolted to the tables end cap. Then I'll need a can to cover the motor & keep the swarf out of it. A front cover too, with only a tight fitting hole for the hose to come out of. The thing makes an incredible amount of swarf/sawdust so I expect at some point I'll make up a vacuum controlling system too, but that would need to be paralleled with the spindle enable. I should have been thinking and brought that out to an I/O connection on my big box of motor drivers. One 5 pin connector is only occupied by the home switches input, so the capacity is there, just not wired up. Hindsight, 20-05 you know. :-\ I didn't wire up an e-stop either, something that will be done when I do this bit of corrective surgery on that box. But its 6+ feet up in the air and about 50 lbs for my ancient back to handle. I have an unused gear change triplet of buttons on the right axis panel that can be used to tally the commanded position, but I've also seen the mist and flood buttons on the left panel. I'd druther the position tally was there, so I may cobble up something there which can also toggle the jigs state, but I am far more interested in gcode control than in manual "by the gui" however. I just want the gui to tally it. Thanks Lester, I appreciated that. 2 of the legends aren't readable though even when blown to a full landscape and printed, the upper left one when the DB is facing the top, looks like a voltage tolerance for the limit switches, and the 3rd one down on the right , under the "relay" terminal callout that I can only make out as: "12-24gobblegook PWM" as its top line, and "gobbledygook Limit switch" as its bottom line in that red box. If you have a text describing that better, can you PM it to me? Thanks, Lester. Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
