MPS MicroMill 2000HD/LE

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22 Mar 2019 11:02 #129247 by andypugh
Replied by andypugh on topic MPS MicroMill 2000HD/LE
Just to eleborate. LinuxCNC won't lose steps, but if the dither becomes bad enough the pulse rate might vary enough that the motor loses steps. This will only ever happen at very high step rates.
The following user(s) said Thank You: tommylight, ant0ny

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14 Oct 2019 21:14 - 14 Oct 2019 21:16 #147888 by ant0ny
Replied by ant0ny on topic MPS MicroMill 2000HD/LE
I have been using my little mill doing small jobs. I bought the collet adapter form Taig so I now have a ER16 collet.

On the weekend I had a 9mm end mill going through a 2020 Aluminum Extrusion just manually and I managed to stall the motor fairly easily.

I have been looking at the 1.5Kw Spindles and VFD from China with a ER16 collet. Would these have more power than the 1/8hp 3000rpm motor belt drive original setup I have? On paper it sounds like it does but does it in the real world?

The 1.5Kw setup weighs 4Kg according to spec sheet which by the time I make a bracket and fill will coolant will be about the same as the 4.8kg setup of the original motor/drive/brackets.

The 2.2Kw spindles seem to be about 5 - 6kgs which is another Question what sort of weight would I be able to run on my Z axis? how would I find out?

My aim is to be able to mill Aluminum with a 10mm cutter. Don't need to do big cuts as time is not an issue for the type of work it does.

Does anyone have any thoughts on if 1.5Kw (or lesser like a 0.8Kw) spindle is capable?
Last edit: 14 Oct 2019 21:16 by ant0ny.

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15 Oct 2019 16:34 #147937 by andypugh
Replied by andypugh on topic MPS MicroMill 2000HD/LE
1/8 hp = 100W. So a 1500W spindle would be a _lot_ more powerful.
The 0.8KW would be 8 x more powerful and might be a better match for the machine.
Playing around in FSWizard on my phone, for a 10mm cutter you would typically use 13,000 rpm and would need 1.5 Hp. So if you really want to use the 10mm then the 1.5kW would be closer. (though you might prefer 6mm cutters, 25,000 rpm and HSM toolpaths)

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15 Oct 2019 21:21 - 15 Oct 2019 21:22 #147950 by ant0ny
Replied by ant0ny on topic MPS MicroMill 2000HD/LE
Andy, thanks for the info and ah yes 1.5Kw is overkill maybe.

Hmmmm maybe I should look at those 500watt ones that are less than half the cost. At that price I would be almost happy to put it as side and go bigger later if I found I needed more later.
Last edit: 15 Oct 2019 21:22 by ant0ny.

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25 Oct 2019 23:27 #148804 by ant0ny
Replied by ant0ny on topic MPS MicroMill 2000HD/LE
Ok I bought one of those Consew motors and fitted it with the Pot replacing the foot switch.

Just need to fit a new pulley and a PU belt and I am done.

I must say for $105 delivered that would be the cheapest upgrade that not only is lighter than the original motor but is 550W and I can control the speed from 100 to 4000rpm (goes to 4500 but i limited it).

I will connect it to the LinuxCNC at some stage and have ordered the parts recommended but to be honest is already 1000 times better.

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