Electronic Wiring – Scalar M – XL
Electronic Wiring on Ramps 1.4 board
5V or12V probe? Careful choose your schematic
- 12V probe has 1 Dupont 2 pins connector and 1 red wire left over
- Red wire left over: +12V
- Black wire: 0V- Ground
- Red wire in connector: Signal.
- 5V probe has only 1 Dupont connector with 3 pins.
- Brown wire (+5V)
- Blue wire (0V – GND)
- Black wire (Signal)
- 5V probe can be provided with and extender with different colors
- Red wire (+5V)
- Black wire (0V – GND)
- White wire (Signal)
The wiring on the electronic board is similar to the previous version of this probe.
- The Red wire corresponds to the Brown wire
- The Black wire corresponds to the Blue Wire
- The White wire corresponds to the Black wire
On this 2nd schematic, ou will find a schematic closer to what is provided within the kit. With the induction probe, the hot end fan ad the auxiliary blower fan.
On the induction probe, it is provided with 3 wires. 2 (red and black) are connected to a Dupont 2 pin connector, and 1 (red) left alone with a node here, is the power supply of the probe.
This schematic corresponds to the kits provided after 17th October 2016.
This kit is provided with a 5V proximity sensors. The blue wire is the ground wire. The black wire is the signal wire and the brown wire is the +5V powe wire.
If your probe is not provided with a 3pin black connector, please look at the other schematics.
A Y shape wire extender is also provided. It’s directly connected to the 12V power output of the Ramps board and will help you to connect the hot end fan power supply to the +12V. It will also be used to connect the 80mm 12V fan dedicated to cool down your electronics.
You should be able to recognize the other components now. The wire’s color on the stepper motors are only for information, the one provided might have a completely different set of colors. The one on the power terminals are real colors with the red wire corresponding to +12V and the black wire to the ground wire (0V)
For information purpose here is the official schematic of the Ramps 1.4 board. It is the same you will find on the official reprap wiki .
This schematic give you more data on all the pin out and also on the optional headers.
A word about the Big green power terminal
Meaning that the big part with the terminals can be removed from it’s base.
The picture here shows the 2 different parts:
- On the left the terminal part that can be removed/unplugged
- On the middle the fixed part, soldered on the ramps board
- On the right side, the 2 parts attached together.
If you want compare directly with the previous schematic, you will need to make a 180° rotation as the power terminals are on the right on this picture and on the left on the previous schematic
For the standalone end stop holder (you might not have it, it has been replaced by the one below.)
Let’s start with the cables located on the Y axis, under the heat bed.
Also take 2 « long » U shaped clips and 1 cable tie.
For Integrated end stop, it’s very easy, the picture shows you how the wires are placed.
You should have 2 wires of the end stop and 4 for the stepper motor.
Bring them all together and secure them inside the aluminum profile slot located just behind the stepper motor support
With 2 long plastic clips, secure the wires. Using short clips is not advised because they will raise the chassis of a few millimeters on this side only breaking the overall equilibrium. Use the « long » clips to keep the main part of the clip oriented toward the top of the machine.
This will secure the wires on the same location.
Place the Y axis end stop connector on it’s place, please read the following to the end before doing anything .
On the picture, the whole set of pins located on the lower left side is dedicated to end stops.
There are 3 rows pins from top to bottom.
The first row is linked to the +5V power (provided from the arduino itself).
The second row is linked to the Ground (+0V)
The last row is linked directly to the arduino.
Attention: Never connect the top row with the middle row because you will short circuit the +5V generated by the arduino when the end stop will close causing. If for some reason you happen to do this you will cause some irreversible damages to the arduino power supply and the electronics might not work anymore afterward.
Important: All the end stop MUST be connected on the bottom and middle row.
To complete the explanation, you can connect up to 6 end stop on a 3d printer. for each axis you can have 2 end stops, one for MIN and the other one for MAX position.
The firmware allows to use only MIN end stops and will handle by software the one for MAX position.
So you can reduce the amount of end stops to 3 end stops.
Each columns dedicated to 1 specific end stop.
Each axis is grouped by 2 columns side by side.
Starting from the right of the picture you will get the following :
- X MIN
- X MAX
- Y MIN
- Y MAX
- Z MIN
- Z MAX
You will connect the Y axis MIN end stop at the bottom of the 3rd column from the right..
Locate it’s connector, you will now connect it to the electronic board.
You will find 6 pins on the same row, with T0, T1, T2 marking just below.
- T0 is for the hot end thermistor.
- T1 is for the heat bed thermistor
- T2 is an optional thermistor for a possible 2nd hot end.
So, connect the heat bed thermistor on the 3rd and 4th pin from the right, which should correspond to T1
You will find the markings indicating what stepper motor the driver is dedicated to.
On the top row, you have 3 motor drivers side by side. From right to left you have the dedicated axis:
- Axe X (marked X)
- Axe Y (marked Y)
- Axe Z (marked Z)
On the 2nd row you have here on the picture only 1 stepper driver and a free space for a 5th stepper driver.
Those are dedicated to Extruders, the part of the printer that pushes the plastic to the hot end.
From right to left:
- Extrudeur 0 (marked E0)
- Extrudeur 1 (marked E1)
Now connect the Y axis motor cable on the middle connector of the first row.
Very important: The stepper drivers don’t support to be powered on without any motor attached to them. doing this will definitely damage the component.
Please make sure to have at least 1 stepper motor connected to each stepper drivers mounted on the electronic board!
If you are using only 4 axis (X, Y , Z, and E0) and you happen to have 5 stepper drivers, mount only 4 of them and keep the 5th one in it’s packaging. It can be of some use as spare part if one of the drivers is failing or damaged.
You may want to know that 1 single stepper driver can drive 2 stepper motor at once.
Connect this motor on one of the 2 rows.
Start by taking a black cable provided with the static relay.
(Scalar M) You won’t have any static relay on Scalar M, so take the 2 power wires coming from the heat bed.
Each terminal connector of this column is identified by a small marking « + » that identifies the +12V output.
As the wire you have was connected on the « – » of the static relay, locate the terminal connector with « D8 » marking and connect the wire on the connector below the « + » marking. It should be the 2nd connector starting from the top.
(Scalar M) Take any one the 2 silicon heater power wire and plug it to the same terminal (the silicone heater has no polarity, so there is no ‘+’ and no « -« )
(Scalar M) take the left over heat bed power wire and plug it at in this same terminal.
On the XL heat bed, as it’s 220V the heat bed is provided with a Ground wire. It’s the one with Yellow and green color.
The purpose of this wire is to link the metallic chassis of your printer to the ground.
Indeed, if the 220V power wire gets broken for any reason and touches the chassis, your electric panel should crack up.
In order to have a proper connection, you need to connect it to any M6 screw on your chassis.
You can use 2 « long » clips to help you maintain the wires inside the slots as shown on the picture.
You might have to remove and replace the clips previously attached on the aluminum profile.
Keep in mind that those wires will have to follow the up down movement of the X axis.
Take the 2 sets of wires, 1 with 4 wires and the other one with 2 wires. As they will move at the same time, it’s interesting to keep them together and check that there are enough length for them to go up and down the Z axis.
Here our carriage is located at the bottom and we roughly evaluate the length of wire we need for it to move up. mark or keep this length (here with our hand on top)
Secure them with a clips at the level marked by your hand earlier corresponding to the length needed to move all along the Z axis.
Place them on the middle of the top horizontal aluminum profile.
Make sure to have enough free wire for the hot end to move up and down and also in each corners.
They will help you to keep all the wires in place in the aluminum profile slots.
You can let free the wires on the side. We will handle them later on.
We advise you to twirl the 4 cables together as it allows to easily keep them in place inside the aluminum slots. It also prevent from making any unwanted nodes with other cables later on.
Locate and take the connector from the other Z axis stepper motor that we previously placed inside the vertical aluminum profile. It should exit right next to the power supply if we refer to the previous wiring we did on this part.
You can use the already in place clips to secure the remaining of the wire up to the end.
This one must go behind the power supply and follow the sale slot used for the previous Z axis connector.
Here on the second row of stepper drivers on the right.
The clips should be able to keep all the cables into place.
The whole set has polarity so make sure you connect the + output from the power supply to the + input of the board and the same goes for the Ground (minus) output of the power supply to the minus input of the board « + »-> »+ » and « – » -> « -« .
On this picture the blue cables are the « +12V » output of the power supply (yours should be red) and the brown wires are the Ground output of the power supply (yours should be black).
In order to emphasize the polarity of each terminal we added some sticker on the photo .
The ground cables (here in brown, yours in black) are to be connected to the « – » terminals.
The +12v power cables (here in blue, yours in red) should be connected on the other terminals marked with « + » sign.
The red wire corresponding to the +12V should be connected to the terminal with « + » marking (here the 3rd on starting from the top).
Connect the remaining black wire corresponding to the « – » (ground) just below.
On the recent kits this fan might already be provided with a 2 pin connector
If your ramps board is provided with a « Y » shape wire extender then use it to connect the fan connector to the +12V of your ramps board.
The fan in front should be On all the time, so it will be connected to the +12V input of the board.
If you have the « Y » shaped wire extender, conserder using it . Use the following step only as an alternative solution to connect the hot end fan to the 12V Power supply.
The red wire (+12V) is to be connected on the same terminal power inputs marked with « + » along side the wires coming from the power supply.
Here we are using the 2nd green terminal starting from the top.
The black wire for the ground is to be connected to the terminal above with the « – » marking
Here the screw diver shows where it’s located.
They can be any color (often red or blue depending on the power of the heater cartridge).
The heater cartridge is mainly a resistive element so it has no polarity at all and wires have no + or -, so you can connect them as you want on the last terminals at the bottom.
This stand alone wire is to be connected on the « + » marking of the green power input terminals. Take the one you want, here for a better repartitions, we propose to connect it to the green terminal at the very bottom.
Note: On certain kits the induction prob is provided with a 2 pin dupont connector (black) with 1 red and 1 black wire.
Warning, This connector has a polarity!
The 2 wires must always be connected on the last 2 rows of pin header with the void unconnected pin left alone for the 1 row.
On the version with 2 pin dupont connector, it must also be connector on the 2 last rows.
The green or red wire corresponds to the probe signal, so it must be connected to the signal dedicated line that is the last row.
The black wire is the ground of the probe. It must be connected to the middle row.