keith wrote:I am seriously thinking about adding [a SuperPID] to my machine.
Awesomeness wrote:I would say probalby not worth the price, since it's over the price of the router itself.
For the combined price of a PC 892 + Super PID you can get a 2.2kW spnidle (true 3HP)! Roughly 3x as powerful, plus precision RPM control... you can even connect it to Mach3 if you really want to. http://www.ebay.com/itm/WATER-COOLED-SP ... 3cf82af4d5 (This is just one example, but eBay is full of them for around $300.)
airnocker wrote:I am able to better control, speeds and feeds (and in many cases, noise levels as a result of lower RPMs).
airnocker wrote:1. I don't do CNC for a living
2. So far, my PC890 is capable of doing everything I either wanted or needed to do (hard/soft woods, phenolic, brass, acrylic plastic) including milling sheet aluminum (dry).
3. My DIY CNC machine currently only needs 110VAC for power, not 220VAC
4. It does not require water cooling
5. Water in close proximity to things that use 220VAC needs careful thought and attention
PS. I am truly blown away at the costs of this spindle example Awesomenes shared.
Can you elaborate on this part more, and specifically how you were limited by the speed control on the router without the SuperPID? For example, did you try to cut something, couldn't get the RPM right, end up trashing it, then were able to complete the project with the SuperPID?
1. How are you implying that not doing CNC for a living is important?
2. What I was arguing wasn't "capable" - there are people that do this VERY SLOWLY with Dremel tools on their CNC. I'm basically arguing that as far as bang-for-your-buck, the SuperPID offers little. I'm interested to hear your thoughts on the speeds and feeds (above), but I still see little capability that you come out with, after adding one, besides a fancy and expensive screen.
3. I was suggesting the 2.2kW spindle because it is roughly the same price as a PC 892 + SuperPID. If you want to stay 110V, you can get a 1.5kW spindle (from the same link above, actually) for far less than a PC 892 + SuperPID, AND it will still be about 150%+ as powerful. More capable in every way, AND cheaper still.
Louder is not good, and again a benefit for those using routers and PID controllers OR WATER COOLED SPINDLES. For me, my biggest noise maker is the shop vac needed to drive the Dust Buster.4. There are air-cooled spindles available for the same prices as the water-cooled. They are just much louder, just like the PC 892, because that's a major contributor of what you're hearing.
5. Potentially an electrical hazard, though it is intentionally designed for it, so it's not just a wild hack. Also, if you use distilled water you can reduce issues further (water actually isn't conductive, it's the minerals in it that are, so distilled water is pretty insulative!).
If you're wanting the downsides of water cooling, I'll tell you what they are... cleaning the damned thing. The water eventually wants to grow algae and other biological stuff in it. So you typically add biocides, silver, etc. to keep growth down, and then you still have to change the water every 6-12 months. In cold regions, you also have to add anti-freeze, assuming your CNC is in an unheated garage (and that may make it conductive again, though I am personally not concerned about the conductive part).
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