gene heskett wrote: >> Some customers drop on a couple of cable >> ties as well just as extra security from knocks. > > Metal ties?, or the common 100 to the bag I can get, and have in stock from > Lowes. They will relax, eventually I've found.
Plastic ones, but it's one of those items that you have to keep an eye on, just like damage to the cables ... >> I'm normally fixing to new motors, and I've converted quite a number. >> Roughen up the backside of the box and a quick wipe with solvent always >> seems to work. > > Solvent = alcohol I assume. Acetone or MEK would remove the paint I'd > think. PCB cleaner ;) I've a big tin from when I used to do a lot more PCB's manually > Anyway, that open frame psu is ordered, along with a 120vac 125 cfm ball > bearing fan. That /should/ cool the whole thing once I find a box to put > it all in. And should run much quieter that those screaming 90mm models > turning 7-8 grand I am using now. I'll get a sheet of alu from the > recyclers to mount the stuff on which should enhance the heat handling& > make a box to flow the air through a filter I can see& change. If you are replacing the PSU, I would have gone with one that gave 42 or so volts ... 500W 30V toroidal transformer + bridge and cap is all you need. http://medw.co.uk/articles/read.php?article_id=12 No fan - just a 6mm Aluminium heatsink on the bottom, but I would add the fan for 4.2Amp continuous working, the 180Ncm motors run 3Amp and the controller does not get too hot over hours, but the British weather helps keep things cool :) - Of cause adding the fan does let the dust in ... > Now for a BOB with opto driving buffers, I have another msg about that here > someplace. ;-) You don't need any more opto-islation on the stepper drivers, just a simple buffer between the computer and the existing opti-isolation on your new drivers. Adding more 'slow edges' just detracts from performance? I opted to drop any optos on the BOB so the mains outlets are solid state relays as well, but the ITX motherboards need a good buffer before any opto-isolators and many off the shelf BOB's don't work reliably with them. But I though you already had a suitable BOB? -- Lester Caine - G8HFL ----------------------------- Contact - http://lsces.co.uk/wiki/?page=contact L.S.Caine Electronic Services - http://lsces.co.uk EnquirySolve - http://enquirysolve.com/ Model Engineers Digital Workshop - http://medw.co.uk// Firebird - http://www.firebirdsql.org/index.php ------------------------------------------------------------------------------ Got Input? Slashdot Needs You. Take our quick survey online. Come on, we don't ask for help often. Plus, you'll get a chance to win $100 to spend on ThinkGeek. http://p.sf.net/sfu/slashdot-survey _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
