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[4]

Enco 100-1525 mill

January Project of the Month [3]
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MarioMares

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#1
Well here is another great find on let go got this for 100.00 deal of a life time I could belive it my self....... But now the big issue its a 3 phase set up. I was wondering any of you guys running 3 phase at home? Should I change the motor to a 1 phase 2 hp ? Any info will help guys I want this baby up and running. Thanks 20180417_213504.jpg
 

Norseman C.B.

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#4
A static converter is cheapest, but you lose a little power, a rotary one is spendy but gives 100%
mileage may vary by brand......................
 

ACHiPo

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#5
Yeah, you definitely suck!

I was happy with the deal I got and I paid 25X what you did, but mine does have a VFD and DRO. I'm really happy with the VFD on my Enco. It is a no-name import. The previous owner planned to replace it, but it kept working, so he never did. Nor will I. IMG_1009.JPG
 

MarioMares

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#6
Yeah, you definitely suck!

I was happy with the deal I got and I paid 25X what you did, but mine does have a VFD and DRO. I'm really happy with the VFD on my Enco. It is a no-name import. The previous owner planned to replace it, but it kept working, so he never did. Nor will I. View attachment 265602

yean man I could not believe it my self even if its to good to be true it never hurts to check it out. Nice set up ACHiPo I want to look into the VFD. I l like what you did for the DRO on the quill..... I have alot to learn but great hobby
 

MarioMares

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#7
going the VFD route is not cheap. man lots to learn loving the hobby..... living the dream...lol good day guys got to get back to work
 

macardoso

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#8
Wait... You got an Enco lathe and mill... for $300 total... in the same week? I thought I was jealous before :D

Let me know if you have questions about the VFD. You can find ones up to 3HP and sometimes more that run from single phase. They can be had for cheap from many sources unless you want some fancier features.

Congrats by the way!
 

MarioMares

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#9
Wait... You got an Enco lathe and mill... for $300 total... in the same week? I thought I was jealous before :D

Let me know if you have questions about the VFD. You can find ones up to 3HP and sometimes more that run from single phase. They can be had for cheap from many sources unless you want some fancier features.

Congrats by the way!

Thank you marcardoso I can't believe it my self I am still pinching my self..... VFD can be had for cheap you have my attention, marcardoso can you give me some links? so i can start my research. thank you very much
 

cathead

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#10
I have basically the same mill, 100-1527 I believe. It ran for some years using the phase converter and the two speed switch.
When the switch wore out, I installed a TECO FM50 VFD. It made all the difference in the world. I hardly use the back gear any more and
seldom change the speeds with belts. The other enhancement I installed was the digital readout, expensive but a very significant improvement
in accuracy and capabilities.
 

macardoso

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#11
Thank you marcardoso I can't believe it my self I am still pinching my self..... VFD can be had for cheap you have my attention, marcardoso can you give me some links? so i can start my research. thank you very much

So you’ll want a basic VFD probably just with analog speed input and start stop (you’ll wire a potentiometer and two momentary push buttons). You can use the knob and buttons on the VFD but they aren’t the most robust.

The first type and cheapest is a V/Hz drive. That basically ramps voltage and frequency together. Honestly this is good enough. If you want better torque at the low end (skip the back gear) you’ll be looking at a sensorless vector (SVC) drive.

Automation Direct has nice products for low prices. Sure you can find cheap Chinese VFD’s on eBay for less but the manual being in plain English is easily worth any price difference. Let’s assume a 1HP motor (idk what yours is) for a V/HZ drive you’re looking at https://www.automationdirect.com/ad...l)/GS1_Drive_Units_(120_-z-_230_VAC)/GS1-21P0 for $134. To jump to SVC you would get https://www.automationdirect.com/ad...S3_Drive_Units_(230_-z-_460_VAC_SLV)/GS3-21P0 for $242.

I’m not affiliated with them but have had great success using their products in the past.

If you use big cutters and want more stable speed in high torque cuts get the SVC.

An example of a cheap Chinese one: https://m.ebay.com/itm/HuanYang-VSD...170069&hash=item3f4f27f0ec:g:8bIAAOSwLgtZi~7-

I’ve seen plenty of tutorials for people hooking these up.

If you want name brand, Allen Bradley PowerFlex, Teco, Delta, Lenze, Hitachi, Panasonic all make nice drives. Expect to pay more though.

-Mike
 

macardoso

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#12
I should mention that there are plenty of other control types besides V/Hz and SVC. If you’re interested, I could dig into the dirty details (I work for a company that makes VFD’s and Servo products). You really only see those two in the lower cost drives though.
 

macardoso

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#15
That motor has multiple wiring options to facilitate different speeds. They are typically called 2-speed constant torque motors. To get the most out of the motor, you want to wire it for "YY". This gives more speed from the motor at 60Hz. See the following image, but also consult the Enco/Grizzly manual: http://static.hackaday.io/images/4404161396194273558.png.

The 3 phases will be wired to your VFD's U, V, W terminals. Since this is not an inverter duty motor, do not attempt to run the motor beyond 60Hz. you could irreversibly damage it (or cause it to explode from too high of speed).
 

macardoso

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#16
You are correct that 1.8kW would be 2.4 HP. Selecting a 3HP VFD will be fine (they don't need to match perfectly).

One thing you may want to consider is installing an AC line filter. VFD's can add harmonics back onto the AC line potentially damaging sensitive electronics (read TV, computer, etc.). Take a look at https://www.automationdirect.com/ad...z-_RF_Filters/RES90_Series,_1A_-_30A/RES90F16.

VFD's contain a small resistor to bleed the motor's rotational energy as heat. They are called shunt resistors. You can upgrade this to a larger one to give faster decels (you can make it stop within a revolution). This might be nice if you want to do precision tapping!
 

macardoso

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#19
No problem. Honestly for how close in price they are I might consider bumping up to the GS3 drive with SVC. But totally your call based on what you’re doing with the mill and what other machines you might want to pick up with your $:p Maybe tomorrow you’ll find a Haas for $40 on letgo!

By the way, stick with a 220/240V single phase input drive. You won’t find a 120V one that will run this motor satisfactory. You can get away with single phase but not less voltage.
 

ACHiPo

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#20
going the VFD route is not cheap. man lots to learn loving the hobby..... living the dream...lol good day guys got to get back to work
Ok, so you do not get to complain about the expense to add VFD. Not when you paid what you did. Just suck it up and pay.;)
 

stioc

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#22
Wow congrats! I guess up in the LA/Pasadena area there are great deals to be had, where I am, further south from you, people generally want almost the same or sometimes even more what things costs new, it's so ridiculous. My experience has been with Craigslist though, I'll have to check out LetGo.
 
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