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| Brushless DC Motor Spindle by c raynerd |
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| tonybraz:
Hi Chris I saw your post on MYCNC as well. I use a 20 Amp Pro Peak power supply, this is a bench power supply for my Bantam BC6 charger. It runs at 13.5volts ,10 amps this is using a 6mm diameter cutter with a cut of 1mm in ali. motor does get warm but have inproved spindle bearings still using orginal motor, hope this helps. If anymore questions just ask. Tony |
| Swarfing:
A Ham radio supply would work well, most will tune up from that voltage as well. |
| andyf:
Chris, I don't know if you are a member of the RSGB, but my copy of Radcom has just arrived with an article in it about using computer PSUs. It mentions a Dell 7000245 as used inside Dell servers, "rated at 900W and has been seen on Ebay for under £40 including postage". Apparently it has a main regulated output of 12v at 77A. I imagine that 0.9kW might be enough to keep your spindle running! Andy |
| John Rudd:
Chris, Over on RCGroups there's info on modding server power supplies that may help you....... http://www.rcgroups.com/forums/showthread.php?t=1292514 It stretches to 5 pages so there's a lot of info |
| j_e_f_f_williams:
I lucked out at a yard sale and found one of these: http://www.ebay.com/itm/LORAIN-FLOTROL-A100F25-HIGH-FREQUENCY-RECTIFIER-100A-/360548962643?pt=LH_DefaultDomain_0&hash=item53f2649153 Still has the $20.00 written on it in marker from the sale. supplies 15 or 24VDC in the config I have at up to 100A! (Don't short the leads and always power it off everywhere when touching wires!) They were used by Bell (phone company) to charge battery banks in the central offices. They may not be common but it's another direction for big power if you can find the right sale or salvage place. I use it to power lots of things wanting 12VDC as 15 seems to be close enough in most cases and I havn't had the amp meter go over 50 yet. Jeff |
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