- Sep 10, 2014
The 12z looks like a good alternative that has a pathway to CNC. Is this a wise choice for a manual under $4,000?
According to the GM, it will handle up to 500 lbs on the table.Just googled them as i hadnt heard of the company, it has a realy wide table for its size, ive always wondered how that stands up to heavey stuff on the table.
Sorry, I misspoke.Thanks for the feedback. Thats a lot of good info.
You mentioned "most of those upgrades can be applied to the manual version."
Which upgrades are given up by not going full CNC from the start?
What I was told is that there is "extra ribbing" that adds to the machine's rigidity. I doubt it's any different/better than anyone else's offerings in this size range, as I would bet that these castings all come from the same foundry.Wow thats pritty nifty, that extra 100kg of mass over the smaller bench mills must really beef it up.
I didn't price the CNC conversion, as I'm not currently interested in CNC (but never say never). I really do like the fact that they use closed-loop servos instead of steppers (appreciated from the perspective of an embedded engineer who's written way too many lines of code for motion control systems).More good info!
Did you get a price on the v4.0 3 axis CNC conversion kit? Do you know if it will be 4th axis upgradeable? Do they sell a one shot oiler kit or are you going to source your own?
I once designed a 6-DOF system for a Darpa project that used high precision linear motors and laser interferometers for absolute positional data. Don't remember precisely, but repeatability of this system was in the millionths of an inch. We had to have real-time meteorological data for our error correction algorithms.Where possible a closed loop servo system is always the best. And in my opinion, feedback directly from the load (the table in the case of a mill) is the best way to go. Unless you are buying a 6 figure machine, relying on the encoder/leadscrew for positioning accuracy introduces too many variables into the equation. I use magnetic readers on my mill that replaced the original encoders.
Open loop stepper systems tend to loose pulses, especially at higher speeds and/or heavy loads. It is possible to close the loop with stepper systems by programming in on-the-fly error correction, if you have a feedback device on the axis.
Both the Industrial Hobbies and the Grizzly mill are made in China. The UK mill you linked is probably made there too.Hi
Is this mill made in the USA. It looks like the one from Grizzly
No, the mill is made in China.Hi
Is this mill made in the USA.
It looks like the one from Grizzly
or the one in the UK
what is the difference in the mills, they all look the same, just the specifications,
in the speeds & motors. Is this one any better ????
The one in the UK look nearly the same.
is tooling for the NT30 Spindle inexpensive and easily obtained in the UK
HiBoth the Industrial Hobbies and the Grizzly mill are made in China. The UK mill you linked is probably made there too.
There is some variation between the mills, but they all started life as clones built following the pattern of the Rong Fu 45 (RF45) square column mill.
The Industrial Hobbies mill received quite a few upgrades over the last decade at the behest of IH, gaining larger table, larger base, thicker cooler on the head, etc.
I would look a little more carefully at the specs when you buy a mill; the UK mill comes with an MT4 taper, which I would rather not deal with in a mill. You should be able to look around and find an R8 RF45 square column mill from an importer in the UK. Try here: