This is the first time i ask for some help here so please be cool with me :).
Before i just want to tell you that it's just a project i want to make but especially Understand,so if you can explain to me your reasoning i would be very thankful
Now please allow me to introduce my problem:
I have a colorimeter , a Jenway 6051 exactly .
The device is fully manual ,i want to make it fully auto (or more likely controlled by a human being via arduino interface). On the left side , the device has a Wheel to chose the filter of the wave lenght , for the time being, I just want to make it controlled by a stepper motor and create a human/machine interface associated with .
I acctually have Two Arduino mega2560, a breadboard, i also bought a stepper motor 14HM11_0404S and finally a stepper motor driver
I didn't do anything for the moment because i don't know where to start.
One last thing, i don't want the answer to my problem i just want some tracks, if i'm really stuck, then and only then i'll ask for some answer
I'm gonna post the datasheet tomorrow because I can't right now I have a lot to do.
About the motor, Actually I just can't use a servo, let me explain, this project is a little school project the goal is to create something according to a subject in order to expose it during a competition , I choosed the subject but my teatchers has some constraints for me, one of them is that I cannot use a servo I just can use a 5v stepper motor.
MarkT what do you mean by "position sensing of the wheel" ?
Thanks for all your help
Ps: I'm gonna upload the datasheet tomorrow or two days later depending of the work I have to do
Fine, Now let me explain the issues i encountered :
The first one is that, for the time being, i want to make the motor moves in Full-step mode , that's why MS Pins aren't connected
acctually it's not a real problem , i guess i could make it through.
The second issue is hardest to solve for me :
According to the datasheet , i must have 10V/Phase and 1,4A/Phase ,The Motor has Two Phases per Coil and has two coils aswell.
The problem is that i have a generator way more poweful than this,
i can adjust it but i just don't know how ? I don't know how much Volts i must use and how Much Amper too
I don't know if the voltage i input is for one phase two phases or every Phases ?
I don't want to broke the component beacause it's expensive, my teatcher will not give me another chance.
I request your help to adjust the generator and also, If you can check the drawing and tell me if it's ok or i need to change something
It does not matter if a power supply can provide more amps than are required. The driver will just take what is required. Just ensure that the power supply voltage is within the range permitted by the driver.
There seems to be an error in the datasheet. It says the coil resistance is 2.5 ohms and the permitted current is 1.4 amps. I would then expect to see a voltage of 1.4 * 2.5 = 3.5v and not 10v. I have no idea which number is wrong and I suggest you measure the coil resistance with your multimeter.
I don't think you have told us the voltage of your power supply?
Ensure that the driver is properly adjusted to match the motor current - if the current limit is higher your motor will probably be damaged.
You don't normally need a connection to the enable pin and I can't remember if it should be HIGH or LOW to allow the motor to operate.
Such stepper motors don't have a voltage rating, if there is one in the datasheet its an error usually
since naive people think all motors have a voltage.
There may be an insulation voltage rating, that's the only interesting one for a current-driven stepper.
Well they could all be wrong of course. That's why the first thing you do with any electromagnetic
component like this is check the coil resistance(s) with a multimeter - typically you need to do this
anyway to figure out (or check) which wire is which.
Sorry for the long time without news, i had some personal issues but i'm back so no problems
So as you told me, i measured the resistance with a multimeter :
I took the two phases of one coil and i measured it (while the arduino board was connected to the copmputer and the motor was connected to it and crossed by electricity )
I found 23,6 Ohm more or less , so i don't know of it's ok ?
I measured the second coil resistance using the same technics and found 23,8 Ohm .
I have a very big problem that i need to solve ASAP because i will fail my project if it's not.
According to the images i uploaded earlier , you can see that my motor is connected to the driver who is himself conneected to arduino board , problem is that even with a good code (found on the arduino forum)
and the good change on the board regarding and according to the code , the motor don't move , i though i broke something so i measured all the component with the multimeter just to see if a value was there, and acctually i've broke nothing so it seems very strange to me .
I need to make it move, one way or another but i want it to move i'm totally desperate trust me !
I spent 4 hours no-stop to try make it move but i cannot so i request your help please i'm a beginner with no skills and i want to change thanks to you , I told you i wanted track not answers, but here i really need answer because i loose too much time i just cannot allow me to loose time again
Peequod:
I took the two phases of one coil and i measured it (while the arduino board was connected to the copmputer and the motor was connected to it and crossed by electricity )
You can only measure the resistance when the motor is NOT CONNECTED TO ANYTHING (except the multimeter).
Considering that your datasheet says that the resistance is 1.4 Ohms I don't know what to make of your 23.6 Ohms. Hopefully you will get a better result when you disconnect the motor from everything.
CAUTION. NEVER disconnect the motor from the driver when the driver is powered up - that is likely to destroy the driver.
