wiper motor control with encoder

[ertansuluagac]

Hello To Everyone;
I want to check the silgec engine with encoder. Is there any document and circuit diagram on this topic? How can I control the silgec motor. And I'm going to check it with a PC. (RS-232 OR RS-485)
ertansuluagac@windowslive.com
_________________
Es

[Ttelmah]

You need to tell us a lot more:

Model of the Silecek motor?.
What encoder?.
What do you actually want to 'do' (move to a position?. speed control?).
What PIC do you intend to use?.

I'm guessing motor like this?.

<https://www.robotshop.com/uk/12v-dc-motor-251rpm-encoder.html>

As a minimum, you'll need an H-Bridge power drive, with perhaps a
10A rating.

[ertansuluagac]

http://www.tepas.com
Planetary Geared Direct Current Motor (Type 4225 PL100).
Processor does not matter. If he tells me how many mm to I go from computer to X, I'll go that far.
for example;
x = 500mm
I'il take the engine 500 steps.
_________________
Es

[temtronic]

I went to the site, encoder is simple 100 PPR (100 steps per revolution), I think.
That's a very low count sensor, so easy for ANY PIC to work with.
Use an ISR to detect encoder rotation and direction, there should be basic code either in the CCS supplied examples, this forum or the code library.
As for the actual motor drive, you'll need some form of 'power' interface. If bidirectional (fwd-rev) is needed, an H-bridge is best solution. One way only ? Use a simple FET, in low side. As for actual components, you'll have to read the datasheets and do some bench testing.
As for communicating with PC, use a PIC with a hardware UART. That gives you ISR ability, needed for realtime control.

Jay

[Ttelmah]

You do understand this is a forum for questions about _PIC_ processors
using CCS C?.

If this is a normal DC motor, you can't move it in 'steps'. You have to
accelerate the motor in the direction you want it to move, then decelerate as
you approach the distance you want to go. Ramping the power down till
you get to the desired point. This needs a processor....

There are 'off the shelf' DC motor control processor modules to do this
like:
<https://www.robotshop.com/uk/sdc2160s-60v-1x40a-brushed-dc-motor-controller.html?gclid=Cj0KCQjw4-XlBRDuARIsAK96p3ChMxTGpm2_19CBy2xMGgH7IewULCmGIO6H9pl4joVIuNDARQO5p9caAlJAEALw_wcB>

But if you want to design your own, you are going to have to start talking
a processor to do this.

[ertansuluagac]

Of course I will do it myself. I'm just asking if there's an example of how I should do it. I'm not telling you to do this project. I know how to code a little bit. I'm just asking how to proceed. That's all. Please do not pull my question in the wrong place.
_________________
Es

[temtronic]

breakdown the project into logical functions
I see
0) basic PIC operation
1) encoder
2) display
3) motor control
4) PC interface

0) simple 1Hz LED program, 'Hello World" tests

1) encoder . simple code to read and display encoder bits

2) display ( usually an LCD module, 2by16 or 4 by 20).

3) motor control. set speed(PWM?) and direction(if needed)

4) PC interface. Usually done with a TTL<>USB module, send text to/from a 'terminal program'.

You'll have to decide which of the 1,000s of PICs to use though ! I'd select one with at LEAST 1 HW UART and PWM/H-bridge peripherals.

Jay

[ertansuluagac]

This, I will use the model of the engine:
Permanent Magnet DC Motor with reduction box and encoder (Type 4225 PL100)
Reduction: 1/27
Encoder: 2 Channel - 100 Pulse
Voltage (Vdc): 24
Power (W): 70
Current (A): 4
Speed (rpm): 120
Duty Cycle (%): S3-30
The information is writing from datasheet . As I understand it, when I give the voltage, the motor is turning. And I can only get position information from this engine. How can I do it ?
_________________
Es

[temtronic]

CCS supplies a basic encoder program, in the 'examples' folder, ex_encod.c.
It will allow you to see how your encoder works.
I obviously don't have your motor/encoder so I can't test though.
You should be able to run your motor with a variable (0-24) power supply and see results!

Jay

[elcrcp]

Hi Ertan,
Unfortunately your question lacks information.
There might be sample codes in code library section but there are multiple parts of the job you ask. First you need a motor driver to run that motor, controlling that driver is a part of the code and might be found in code library, reading encoder and calculating distance and direction is another part. PC interface is also another. Combining these together is again another job.
Now you know what motor you gonna use, so you should choose or build your driver model, if reading encoder needs extra electronic parts (might be, due to voltage differance or signal shape) you need to pick them, then you decide PC interface, and lastly you should pick a PIC model which can support your choices.
But if you are looking for an experimented circuit design and code which does what you ask for then you should google it more.
_________________
There is nothing you can't do if you try

[ertansuluagac]

No, I don't think so. So the only difficult thing here is to determine the direction.The motor starts to rotate when voltage is applied. Direction from pins A and B will be determined. But how? That's what I want to know. I will also use the processor PIC16f88. and RS-232 is the easiest job. Another thing that makes me think is that the data page says this. 2 outlets - 100 pulse writing. What does it mean. That's all.
_________________
Es

[temtronic]

re:
2 outlets - 100 pulse writing.

2 outlets, means "A" and "B", the 2 phases of an encoder. You determine which is forward and reverse. There are 4 'phases' to a quadrature encoder pulse train. It's up to you to decide which sequence is 'forward'. There is a LOT of information about encoders on the internet. MFRs like US Digital have great spec sheets and application notes. Also several an early PC 'mouse' was based on a PIC with 2 encoders as inputs, outputting the data to the PC via RS232. There should be a Microchip application note online. I know 'Parallax STAMPS' have an article about using 'optical encoders', it's probably 20 years old.

100 pulse writing

probably means that there are 100 pulses per 360* rotation of the shaft. In the World of encoders that's very few per rotation. The ones I used were 1024/4096 per rotation.

[Ttelmah]

Basic quadrature.

Two square waves, 90 degrees out of phase of one another.

For a 100PPR encoder, there are 400 detectable 'positions'. Corresponding
to the rising and falling edges of each waveform.
Direction is detected according to which waveform leads the other. So:

[ertansuluagac]

What is the name of your compiler's sample file. How to access the applications for Microchip's servo. If you know the link address, can you share it? How do I use the table you write for A, B, and phase? Can you write me a simple, clear code? I don't know how to use this.
_________________
Es

[temtronic]

CCS supplies an example of encoder with PIC. it's called EX_ENCODE.C (I just checked..),it's located in the examples folder.
Obviously you'll have to change PIC type, some 'fuses', maybe the I/O pins, but it IS simple, basic working code.

Jay