Cheap 1500W Chinese spindle, experiences?

[diyengineer]

For all who want a quality VFD: Hitachi X200-022NFU1
http://www.driveswarehouse.com/Drive...0-022NFU1.html

Full instruction manual available online:
http://www.driveswarehouse.com/docum...achi/X200M.pdf

Can someone very generally explain how this connects to mach so a person could control spindle speed from mach?
Thanks.

[jalessi]

Diyengineer,

Simple solution, checkout the C6 board.

See attached image and links.

http://www.cnc4pc.com/Store/osc/prod...products_id=58

http://cnc4pc.com/images/Hitachi_L100.jpg

Hope this helps,

Jeff...

[diyengineer]

Originally Posted by jalessi Diyengineer, Simple solution, checkout the C6 board. See attached image and links. http://www.cnc4pc.com/Store/osc/prod...products_id=58 http://cnc4pc.com/images/Hitachi_L100.jpg Hope this helps, Jeff...

Ahhh now it all makes sense. I was going to go with a C23 connected to 3 viper 100's. Now i understand what they are talking about it, in regards too having a built in 0-10V control section.

Thanks Jeff!

[yngndrw]

Mine is marked too, looks to be laser etched and clearly states the ratings.

With all due respect, I think you guys are making mountains out of mole hills here. I think the majority of people in here who bought these spindles have bought them in comparison of routers - I.e. These spindles for our use are in competition with routers.

The price is a bit more, but the quality compared to power tools is excellent. If you need something which is guaranteed to be 110% reliable and last for a long time through a lot of tough work, then maybe you should be looking at something branded or even but a spare one of these. However for the hobbyists here, these spindles are great.

[scobob]

Originally Posted by yngndrw Mine is marked too, looks to be laser etched and clearly states the ratings. With all due respect, I think you guys are making mountains out of mole hills here. I think the majority of people in here who bought these spindles have bought them in comparison of routers - I.e. These spindles for our use are in competition with routers. The price is a bit more, but the quality compared to power tools is excellent. If you need something which is guaranteed to be 110% reliable and last for a long time through a lot of tough work, then maybe you should be looking at something branded or even but a spare one of these. However for the hobbyists here, these spindles are great.

Where did you purchase yours?

[yngndrw]

Love-happyshopping on Ebay.

And I'd like to clarify - It looks to be laser etched to my highly untrained eye.

[eloid]

http://kerigroup.en.made-in-china.co...K-SP1500-.html


Well my my my... word for word copy and pasted straight off of the website.
I will contact them and see what i can dig up here is there contact info.



pictures are the exact same also.....lol ...

hey any one need linear rails and ball screw
check out there link also

http://kerigroup.en.made-in-china.co...ct-list-1.html
http://kerigroup.en.made-in-china.co...near-Rail.html
http://kerigroup.en.made-in-china.co...g-Machine.html



Company Name: Keri International Group(Shanghai)
Company Address: Room 502, No 12, Lane 86, Yongjian Road, Pudong New Area, Shanghai, China
City/Province: Shanghai/Shanghai
Country/Region: China
Zip/Postal Code: 201206
Telephone Number: 86-21-61826920
Fax Number: 86-21-61826777
Contact Person: Mr. Alan
Position: International Sales Manager
Department: Overseas Marketing Dep
Showroom: http://kerigroup.en.made-in-china.com

[diyengineer]

I thought people were making a big deal out of "nothing" as well. The more i dig the more lies i find.

Look @ the diagram below supplied by linearmotionbearings2008, for all who have purchased through him, let the diagram grace your eyes.

electricity 101
Power/ Voltage x Amperage


Voltage x amperage=POWER

800Watt (.8KW) Spindle:
220v input x 6 amps= 1320Watts <--Fail.
220V input x 3.63 amps= 800 Watts <--correct.

1500watt (1.5KW) Spindle:
220V Input x 8Amps= 1760Watts <--Fail
220V input x 6.8Amps= 1500Watts<--Correct

2200watt (2.2KW) Spindle:
220v Input x 8Amps= 1760 Watts <--Fail.
220V input x 10Amps= 2200watts <--Correct.

3000watt (3KW) spindle:
220V input x 8amps=1760 watts <--Fail.
220v input x 13.63amps=3000 watts <--Correct.

Keep in mind 746 watts= 1 English Horsepower. (metric uses 735.5 watts)
.8KW---> 1.07HP
1.5KW--> 2.01HP
2.2KW--> 2.94 HP
3.0KW--> 4.02 HP

So basically to sum it all up from this wonderful linearmotionbearing2008 diagram...

.8KW-- 520 watts more than advertised.
1.5KW--260 watts more than advertised.
2.2KW--440 watts less than advertised.
3.0KW-- 1240 watts less than advertised.

Am i making a big deal? No i'm not at all. They are the ones supplying the documents that are just mutilated beyond regard. They don't even attempt to check there calculations!!

When you see .8KW pull 6 amps, and 3KW pull only 2 amps more... C'mon ppl.
In real life that .8kw would pull roughly 3.63amps, and the 3KW would demand 13.63 amps. That is 10 amps more, not 2.

Hope this helped clear the light. I will continue to investigate.

[jsheerin]

The above is incorrect. 3 phase power calculations are different than single phase. 220v at 8A is ~3kW, 6A is 2.2kW, 2A would be about 0.8kW. Sqrt(3) * V * I should get you close.

Obviously you're right that the documentation is suspect as different power levels would draw different currents for the same voltage, but I think you guys are expecting too much in the form of technical expertise. In my experience dealing with Chinese vendors ($100k's of various parts a year for products I was developing at a previous company), you need to tell them exactly how you want something done or make sure they are already doing it that way (which you obviously can only do if it is worth their time to do it for you, ie, you are ordering large quantities). Then constantly check to make sure nothing has changed on the parts you receive. You need to be the expert. They are typically not design experts. In my experience, they do not have the background to design things for scratch. They copy other parts but don't always know why things were done a certain way. They pick things up as they go, but they are making parts while they are learning. The Chinese manufacturers I dealt with that were innovating and had a good handle on the technical aspects of their products typically were run by companies in other Asian countries like Taiwan and the technical expert worked there.

Additionally, expecting the guy you deal with on ebay to be a technical expert is not very realistic. If he was the tech expert he'd be off somewhere designing something, not selling 1 part at a time on ebay.

[diyengineer]

Current (3 phases): I = P / √3 Vl×cos φ
Power (3 phases): P = √3 Vl×Il×cos φ

Power factor PF = cos φ = R/(R2 + X2)1/2, φ = power factor angle. For the purely resistive circuit, PF = 1 (perfect).
The apparent power S is calculated according to Pythagoras, the active power P and reactive power Q. S = √(P2 + Q2)

Got that from online if anyone needs its haha.

I was going to use the above equation but for simplicity it was just a point to prove.

You are correct though, its just amazing how they cant sell a damn spindle with even the correct specs.

Originally Posted by jsheerin The above is incorrect. 3 phase power calculations are different than single phase. 220v at 8A is ~3kW, 6A is 2.2kW, 2A would be about 0.8kW. Sqrt(3) * V * I should get you close. Obviously you're right that the documentation is suspect as different power levels would draw different currents for the same voltage, but I think you guys are expecting too much in the form of technical expertise. In my experience dealing with Chinese vendors ($100k's of various parts a year for products I was developing at a previous company), you need to tell them exactly how you want something done or make sure they are already doing it that way (which you obviously can only do if it is worth their time to do it for you, ie, you are ordering large quantities). Then constantly check to make sure nothing has changed on the parts you receive. You need to be the expert. They are typically not design experts. In my experience, they do not have the background to design things for scratch. They copy other parts but don't always know why things were done a certain way. They pick things up as they go, but they are making parts while they are learning. The Chinese manufacturers I dealt with that were innovating and had a good handle on the technical aspects of their products typically were run by companies in other Asian countries like Taiwan and the technical expert worked there. Additionally, expecting the guy you deal with on ebay to be a technical expert is not very realistic. If he was the tech expert he'd be off somewhere designing something, not selling 1 part at a time on ebay.

[hemsworthlad]

Bottom line is a large percentage of those that actualy DO OWN one of these spindles are very happy with them and understand that the are not top quality spindles but also are very happy because they didnt pay top quality prices.


I,m 100% happy with my purchase from linearmotionbearings and I fully recommend Chai and who owns the site, i have bought several things from him over the last 2 years and always been happy with both the products and delivery time,s.
Regards Warrenty the only trouble i,v ever had was with the VFD but again Chai was very good with dealing with me on this, I had 2 faulty vfd's out of those 1 just needed a thirmister chip and the other i dont know but with both he told me to keep them and still sent me the 3rd free of charge, the blown chip was repaired and my friend use's it on lathe.

Cant ask better than that really..!! . . . so to anybody thinking of buying from him but being put off by others who have never dealt with him then i say ignore them and listen to those that have.. and are very happy.
Yes there will be those that have had trouble with him but i suspect some of this could be attributed to the manner and lack of respect they treat people and like the Old saying "you cant please everybody" . .!!

A.t.b

[scobob]

I guess my biggest concern is not getting both what I pay for and what I need. I intend to do mostly wood and some light non-ferrous metals. Has anyone done this with the ebay spindles?