Anyone have any idea if this will fit the NM-200 v2:
CNC Mill High Speed Spindle | Tormach | We provide personal small CNC machines, CNC tooling, and many more CNC items
I have no idea if the quill is "Bridgeport-style" or not. I'd love to get 18000 RPM with a 1/4" end mill - that'd let me hit 100" per minute and cut many hours off my machining. Thanks!
-Mike
Yes it should fit. It triples speed, not doubles it, though.
The biggest problem is you'll have to beef up the screws in the nose holding the spindle in place as they barely old the existing spindle up, relying on upward pressure.
Ha, sorry, I saw it was a 3.1 to 1, I just misspoke er typed. The idea of cutting at 80-100 inches per minute with my current operations really appeals to me and the price seems justifiable if it's going to cut my machine time by 70%. As for beefing them up - just replacing them with a higher grade or doing something more drastic? Sorry, I've not disassembled that part of the machine before. Thanks!
-Mike
The thread I posted awhile back on the teardown shows images. Personally I'd drill & tap for larger screws. In my case they had started drilling & ran into issues (hole skewed IIRC) and started again like 30degrees rotated. So I'm thinking the holes were drilled by hand. A couple screws had a (relative) lot of slop in them too. They're so small there's really not a lot of room for error to have any hope of holding.Originally Posted by webgeek
Personally I'm ordering in a 3hp 3 phase water cooled spindle soon from eBay. It should swap directly in to the 80mm spindle bore with a mounting bracket. 24k rpm. But it requires installing a vfd and making a swappable harness to switch between the regulr spindle & the high speed one.
I'm still waitimg on my 4th axis, though, so that's going to get set up first. I've been waiting since the mill got here (like July or something?) but there were a few delays and now wouldn't you know that Canada Customs decided to inspect that very container, further delaying it. I swear customs has been trying to piss me off this year, this is about the 4th shipping problem I've had since the summer. Maybe I'm on some sort of watch list.
How much is that beast going to cost? I certainly don't need anything anywhere near that big but I'd love higher RPM to let me take advantage of the machine speed. With my little X2 mill I'd planned on using a Proxon or something. I don't need much depth of cut - just RPM. Wonder if I could do a brushless RC motor setup and have two spindles...
They're only around $400 shipped to Canada with the vfd (search ebay for "2.2kw spindle inverter"), so quite a bit less than the product from Tormach. Some have had problems with the vfds, but apparently it revolves around the manufacturers using undersized wiring (what's new?) which is easily replaced. 2.2kW=3hp. You won't get much torque in the low speeds though, but who's running it slow?
They're popular here with the routing and pcb crowd.
On another note, got a message from Khai that Customs have released the shipment. So should be here soon...
Wow, this is very cool - glad you told me about this. Is this correct:
2.2KW WATER COOLED SPINDLE MOTOR ER20 & INVERTER DRIVE - eBay (item 250748327119 end time Jan-26-11 18:44:44 PST)
Looks like it has everything. Too bad my Tormach tooling wont fit - is there a way to do repeatable tool holding with something like this?
Also, why not set this up as a second spindle rather than replace the first spindle?
-Mike
Yes, that's it.
Unless I'm missing something the speed tripler from Tormach uses er16 collets, so it won't accept the TTS system either. The TTS tooling is not rated at anywhere near those speeds anyway, AFAIK, so it would probably be dangerous/catastrophic. I prefer ER20 anyway, as I already have a full set of collets.
As for repeatable toolholding, I believebthere's a thread on cnczone somewhere touching on the subject, but I can't find it.
Yup, that was a problem with the speeder too. I'm a bit enamored with TTS right now as converting to it really sped up my machining. Most of my parts have 3-4 tool changes right in the beginning and getting the whole process working with offline measurement and the like has made it a lot more effective.
-Mike
That seller has the air cooled spindles too! Seems like a good price as well.
Although I can make 220V work, is there options for a 110V version anywhere?
110V just makes life a little easier.
What kind of noise do these things generate? are they fairly quiet?
They're not too loud, there are some videos on cnczone. Search for "chinese spindle", maybe add in 2.2kW.
As I understand it the air cooled spindles can be problematic at low speeds (less cooling)
If you've got an nm-200 there's 240v available in the cabinet. Otherwise you'd be looking at a decent size transformer. Irregardless, 2.2kW has a current draw of nearly 20A at 120V, which isn't taking into account other losses in the vfd. So you'd need a 25A or higher circuit to be legal/safe, which isn't common.
What size is the shank on the TTS holders? Perhaps they could fit in an er20 collet(max 1/2"/13mm IIRC)?
Alternatively, have you tried an auto-Z zeroing setup? Fairly simple, and works well. If your pendant allows custom button asssignments you can have a button to run it nice and quickly. Alternatively set a convenient location as your zero point, ideally a part of the machine, mount the plate there, then set your m6 to run a macro to rapid there after the change, drop down, set zero, then rapid back to position. Granted it's a bit of work but not a lot.
TTS is 3/4", you would need an ER32 chuck to hold them. i dont think it would serve any purpose though as theres no way to index for z height, which is what makes them useful.
id be wary of the water cooled chinese spindles though. they seem to be all over the map. pick a seller with a good reputation.
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