CNC Main and Control Circuit

[Senvy]

Hello Everyone, I need help with this project. The files are attached. I would like someone to tell me in details, how does the main circuit and the control circuit work. e.g: When Sb1 is pressed, then ... energises, etc etc.

1.1 control requirements and technical parameters

1. The main motion and the feed movement of the lathe are driven by motor M1.

The main function are positive and negative rotation, inching and stop by electric braking.

2. Cooling pump drag by motor M2, direct starting, one-way position.

3. The fast moving of the knife shelf cutter is drag by motor M3. One-way inching.

4. Necessary protection and interlock is required.

5. Local illumination.

6. The power of the motor:

M1 model: Y200L-4, power: 30kw, rated speed: 1470r/mim, rated current: 56.8A,

rated voltage:380V

M2 model: JCB-22, power: 0.15kw, rated speed: 2790r/mim, rated current: 0.43A, rated voltage:380V

M3 model: Y90L-2, power: 2.2kw, rated speed: 2840r/mim, rated current: 4.73A,

rated voltage: 380V

And How to explain(writen) how to:

2. design circuit

2.1 design main circuit

2.2 design control circuit

2.2.1 control M1

1. positive and negative rotation

2. positive inching

3. stop by electric braking

2.2.2 control M2

2.2.2 control M3

2.3 local illumination circuit


Thank you so much for your kind help,

Cheers

 

[JimB]

Whatever is this schematic for?
Is this some kind of perverse college homework, or have you just been pushed into the deep end at work?

At a first look through it appears to that:

SA turns on/off the light.
SB1 is the overall machine stop. (Emergency Stop ?)
SQ appears to be a press and hold switch to run motor M3
SB5 starts motor M2
SB6 stops motor M2
SB4 runs motor M1 at low speed/power in the forward (?) direction. Releasing SB4 stops M1.
SBC (?) runs motor M1 at high speed/power in the forward (?) direction. The motor is latched into the run state.
SB3 runs motor M1 at high speed/power in the reverse(?) direction. The motor is latched into the run state.
KS1 runs motor M1 at low speed/power in the forward (?) direction. Releasing KS1 stops M1.
KS2 runs motor M1 at low speed/power in the reverse (?) direction. Releasing KS2 stops M1.

If this is a real machine, do not come crying to me if I am wrong, M3 looks like a serious motor which can do some real damage.

JimB

 

[Senvy]

Thank you JimB.

This is actually a project at school that I have been forced into without good knowledge of the subject. If you see the .doc file, you will get a better idea of the project. Yet, I do not know if this circuit is suitable for the requirements as in the .doc file. lol.

But thanks loads my friend. Any help is much appreciated.


1.1 Analysis of the movement.

The Lathe is a medium size one, which the maximum diameter of work is 1020mm and the maximum length of work is 3000mm. The movement is the spindle rotation; Feed movement is the linear motion of the cutting tool drive by saddle or tailstock.

1.2 control requirements and technical parameters

1. The main motion and the feed movement of the lathe are driven by motor M1.

The main function are positive and negative rotation, inching and stop by electric braking.

2. Cooling pump drag by motor M2, direct starting, one-way position.

3. The fast moving of the knife shelf cutter is drag by motor M3. One-way inching.

4. Necessary protection and interlock is required.

5. Local illumination.

6. The power of the motor:

M1 model: Y200L-4, power: 30kw, rated speed: 1470r/mim, rated current: 56.8A,

rated voltage:380V

M2 model: JCB-22, power: 0.15kw, rated speed: 2790r/mim, rated current: 0.43A, rated voltage:380V

M3 model: Y90L-2, power: 2.2kw, rated speed: 2840r/mim, rated current: 4.73A,

rated voltage: 380V


And I need to explain:
2. design circuit

2.1 design main circuit

2.2 design control circuit

How to:
2.2.1 control M1

1. positive and negative rotation

2. positive inching

3. stop by electric braking

2.2.2 control M2

2.2.2 control M3

2.3 local illumination circuit


If it's possible, your kind answers would be much appreciated. Thanks so much dear.

 

[JimB]

So, this is home work for college.
Please be aware that we are not here to do your homework for you. We will help you, but you have to put in some effort first.

This is actually a project at school that I have been forced into without good knowledge of the subject.

How have you been "forced" without good knowledge ?
Have you not covered the relevant topics in the course?

JimB

 

[Senvy]

Hello JimB,

Thank you very much for your kind comments.
It's not difficult to explain why I am asking for help : I am in China. lol...

Would you be able to help me, I would appreciate it.

Thanks dear

 

[JimB]

It's not difficult to explain why I am asking for help : I am in China. lol...

Why does your location in China mean that you need help?
Are you at school/college in China?
Do you speak Chinese?

JimB

 

[Senvy]

Yes dear, I am studying in China. I do speak Chinese.

Well, thanks for your kind help brother. If you really want to talk, please PM me, I shall tell you more if you would like, as this is a thread, no need for people to know what we are talking about.

Thanks