Okay, we're gonna do the jumper for the
X-axis and now we have to review some stuff real quick here. We have the MS 1 2 & 3 sets of pins
if you place a jumper on any of these pins you'll change the actual rotation of the
Stepper motor, so if there are no jumpers. It would give you off complete 360 degrees
If you have a jump around MS1 only
Then that would give you a half step
if you had only
The jumper on MS2. It would give you a quarter step if you have a jump around an MS1 and MS2
that would give you one eighth of a step, and if you have all three
then it would give you one sixteenth step and seeing how that we're doing a
3d printer we want the precision so we are going cap all three of these with jumpers
Now careful with the jumpers are kind of hard to get in place
Now let me talk briefly about stepper
drivers
This is a stepper driver
It's called a A4988
It has a potentiometer to adjust the amount of current that goes to the motor
Now this potentiometer you can use usually a nonmetallic
Philips head type and turn it to either increase it or decrease it. I'll let you look that up, but
In this particular stepper you always have to have the potentiometer pointing away from
The power supply and this gives you 1/16 steps
This is a
DRV8825
And this will allow 1/32 steps in the current configuration we're in and the potentiometer is over here now
When you plug this in has to point towards the power supply so for simplicity we're going to start with this one
And we're going to just insert it in these pins
Just apply a little pressure to push it down
Now because we're using an end stop
The first thing that we want to do to make it so that we can test it real easy so
We also want to insert the X and
Stop for minimum, so this is MIN X and
then for the motor
We need a connector for that
Some of these motors will come with connect with wires coming out already
But in this case this particular motor uses it
also motors can either be
One
Point eight degrees of step which it give you two hundred steps in a 360
degree rotation and
Then we also have a motor that
Can do 0.9 degree steps
which means that you get four hundred steps, but for simplicity sake we're just going to use a
stepper motor that does
1.8. Degrees of step
That did the USB for the board side front of the car Arduino MEGA 2560
We need to also connect it to the computer
So to do that we plug in the other end the USB of the computer and hopefully hear a beep saying it worked
Which it did ok. We are going open up Marlin. This is the firmware
Okay now inside Marlin. We're going to go to configuration
We're going to scroll down to where the stepper settings are
Okay
So this is the configuration the default for the steppers
So as you can see above here
This is your X this is your Y this is your Z and this is your E0.
Here E0 now it means you can also add other steppers. They show you the default way to do it over here
But what we are going to be concerned with is actually changing
No values for the moment and just loading it and then seeing what occurs
So first thing we can do is check to see that we're connected
So it looks like around COM 3 looks like we have the right board selected and subtype
So lets compile and load
Okay now it's uploaded hooked up, and we're about to start Pronterface
We got to add power from the power supply, so we are going plug in that 12-volt power supply
Looks like everything's okay at the moment. Let us check the end stop real quick here, that works fine now
We are going to open up Pronterface.exe
Okay, we are going connect the device now that we have the Marlin firmware
Loaded
First thing we want to try is to do home to X, so
while we are doing home to X
We are going to actually the center to let it know that it's reached the ends though
so watch the motor
So we have found the home so now that we have found the home we are going advanced by a hundred
Now that we advanced by hundred we are going go back by a hundred
Appears to work perfectly fine
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And Thank You for your time