If your computer does not have a parallel port, all you will need is a low cost PCI parallel adapter card (these can be found on amazon for $15-$20). If you plan on using a laptop (not recommended) you can try to find a PCMCIA parallel adapter, but many people have frequent issues with this setup. A more expensive solution would be to purchase a USB smooth stepper board. Unfortunately, we do not supply any of these adapters and cannot attest to their reliability.

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I have a parallel. breakout board. and no parallel port at the back of my computer do those parallel. cards. work with the breakout board?

If your computer does not have a parallel port, all you will need is a low cost PCI parallel adapter card (these can be found on amazon for $15-$20). If you plan on using a laptop (not recommended) you can try to find a PCMCIA parallel adapter, but many people have frequent issues with this setup. A more expensive solution would be to purchase a USB smooth stepper board. Unfortunately, we do not supply any of these adapters and cannot attest to their reliability.

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MY COMPUTER DOES NOT HAVE A PARALLEL PORT. HOW DO I INTERFACE WITH THE BREAKOUT BOARD?

A parallel to USB adapter will not work. You will need to use a USB interface like the ones below:

Mach3 USB interface:
https://www.buildyourcnc.com/item/electronicsAndMotors-electronic-component-breakout-Mach3-USB-Board

Poeys57CNC Interface:
https://www.buildyourcnc.com/item/electronicsAndMotors-electronic-component-breakout-Mach4-mach3-USB-ethernet-Board

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To answer the question in more detail, the parallel port is actually an extension straight from the CPU and is also called the GPIO (General Purpose I/O) pins. These pins carry signals independently, hence the description as being a parallel port.

The stepper motor driver receives a pulse train (series of pulses). A single pin on the parallel port sends a pulse train to one stepper motor driver and stepper motor for a single axis. Another pin on the parallel port sends a pulse train to another stepper motor driver on another axis. This happens simultaneously as with the direction signals for each axis.

If a parallel port is adapted through a USB (using an adapter), the parallel port cannot have these signals happen in a simultaneous fashion and will cause the stepper motors of a CNC router or machine to be very clunky, if it works at all. To elaborate, the computer sends an instruction to the USB to send a high signal to pin 1, so it does, then another signal to pin 2, so it does. This is happening one after another. The speed at which this happens is reduced dramatically, and the position of one axis may now be out of sync to another axis.

The reason the USB interfaces (linked above) work is that the USB delivers broad instructions to the interface (to a microcontroller) and the interface parses the instructions and outputs simultaneous signals to the stepper motor drivers.

Hope this helps.

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My computer doesn't have a parallel port connection. Can I use a usb to parallel port cable to communicate with my breakout board?

Most motherboard do contain parallel ports, but the port connector may not be at the back (in the section where external connectors will be connected). Instead, the motherboard may contain an LPT ribbon connector on the actual face of the motherboard (usually along one of the edges). You will need a ribbon connector to a DB25 female connector.

If your motherboard does not contain an LPT header on the motherboard, you can purchase a parallel printer adapter that plugs into one of the PCI slots. The price of the adapter is very inexpensive and sometimes is actually less costly than the actual ribbon connector.

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As I am building my 20" x 24" laser engraver cutter, I notice that there is no parallel port on the onboard computer and I have the parallel breakout board any answers?

You can go here to find the diagrams and instruction on connecting the parallel breakout board:

https://www.buildyourcnc.com/item/electronicsAndMotors-parallel-breakout-relay

Also, please make sure to watch all of the electronics tutorial videos here:
https://www.buildyourcnc.com/CNCElectronicsandWiring.aspx

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how do I connect the parallel breakout board?

The parallel (printer cable) port is uses the computer as its main source of pulse trains to operate the motor driver directly. Parallel ports are a direct connection from the processor commonly referred to as GPIO pins (General Purpose I/O pins) and provides a convenient and powerful way to interface with the computer. The parallel breakout board is included in those kits only to condition those signals for use with the drivers.

The USB serves at the actual controller, sending the pulse trains, but the computer sends simple human readable instructions to the USB controller to tell the controller how to send pulses.

The non-technical differences that may serve as the most important information to you is that the parallel configurations allow for a wider variety of industry standard software that can be used to control the cnc machine. The USB that we offer requires the operator to use a software called Planet-CNC software which is a very well made and feature full cnc control software.

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USB Motion controller breakout board work with planet cnc software?

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WHAT'S THE DIFFERENCE BETWEEN PARALLEL BREAKOUT BOARD AND USB ITERFACE?

The parallel is the most versatile breakout board we have and will work with most of the software out there, but many computers are not equipped with parallel connectors anymore. Parallel adapter cards are available if you don't have a parallel connection on your computer.

The USB interface must be used only with the planet-cnc software, which is great software, but you are still limited to only that software application. This is actually the least expensive option unless you use linux and go with the above option.

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WHATISTHE DIFFERENCE WTIH THE PARALLEL BREAKOUT BOARD AND USB BOARD?

The USB port on the Parallel Interface board is necessary to supply 5V power. Connect with a USB cable to a USB source.

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I purchased a parallel port breakout board. I have checked all the info and found nothing on the usb port. What is it used for?

Please email customerservice@buildyourcnc.com so we can assist you.

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Why didn't I receive a ribbon cable so that I could connect the parallel breakout to the motherboard?

To connect the parallel port breakout board to the LEDs, use step number 18. The connections are listed at the bottom. Here it is for your convenience.

For the LED connections on the parallel breakout board:

- The x axis LED will be connected to pin #2 and 5V
- The y axis LED will be connected to pin #4 and 5V
- The laser on/off LED is connected to pin #6 and 5V

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I can't find any information in the BlackTooth instructions about how to connect the 8 wires from the LED display to the parallel breakout board. The two going to the pot seem, in the illustration, to be soldered together and to the centre terminal of the pot? Help, please.

A parallel breakout board requires a computer with a parallel port. The parallel port provides the communication. The reason the board has a USB port is only to provide power to the board from the computer. If the USB connection is not plugged in to the board, the board will not have the power needed to function correctly.

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the breakout board that i recieved has both a 25pin and usb connections. can i use the usb to plug into my laptop

The parallel breakout board contains a USB port to power the board. Through the USB port, the computer delivers 5v of stable power to the parallel breakout board, but doe not provide any communication as would normally be associated with USB connectivity.

The reason we elected to use the USB port to provide power is to remove the need for an external 5v wall adapter.

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Does the Blue Brew breakout board require 5v to be supplied from a USB cable, to pass parallel port outputs to its terminals?

The 5V power required for the breakout board can be a simple USB male to male cable, that will connect from your computer to the board itself.
Now adding a external power supply make sure that it does not exceed a total of 5V and the standard 500 MilliAMP - 1 A.

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I have a YDH-18-5 Power Supply AC Input:100-240v 47-63Hz, Ouput: 5v - 2A and need to know if its safe to use with the Parallel Breakout Board.

Hi, this BBB comes with a USB port and its cable to power it up. Once connected to the computer a led in the BBB will light up to show it has power.

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Breakout board I have does not have USB port for the 5v power. Does the parallel port supply the 5V power?

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Hi, I need assistance, the parallel breakout board I received looks different from the one on the video, does this one need a 5V supply? If so, where do I connect the positive and where do I connect the ground? Thanks for your help.

The USB on the Parallel breakout board, is used for powering the board itself (5v USB), and the Parallel to communicate directly between the drivers and the computer/mach 3.
Planet-CNC cannot be used with our Parallel Breakout Board, it is only intend to be used with Mach 3/other open source programs.

To use Planet-CNC, please refer to our USB breakout board! (https://www.buildyourcnc.com/item/electronicsAndMotors-electronic-component-USB-Controller-Breakout)

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can I use the usb on the parallel breakout board with planet cmc

The parallel breakout board has the db25 connector for data and the USB connector for power. Connect the USB from the computer to the parallel breakout board so the breakout board will have 5V of power coming from the computer. The db25 connector (connector with the 25 pins) receive data signals for each pin from 1 to 17 and have respective numbered screw terminals, some for input and some for output (18 to 25 are gnd pins).

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The parallel break out board on the Blacktooth machine has the parallel 25 pin socket, and also a usb socket. Should this usb socket be connected to the computer's usb port as well as the printer cable being connected to the printer socket?

The mapping of the input pins of the parallel breakout board is configured through software. The input pin are very versatile and can be mapped to all kinds of different types of input including axis limits and axis homing.

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Is there a mapping on the input (switch) pins to an axis on the parallel breakout board?

Depending on the board you are currently using, either the Parallel or USB interface board.
The parallel interface needs the USB cable for power(5v) and the parallel cord for communicating from the board to the computer and vise versa.
The USB interface board, will need a keyboard jog header made to fit the 12 pin connector(2 x 6). Making this connector will allow you to be able to wire it to a external panel, where you can use it to jog your machine rather than using the onscreen jogging.


Please contact customerservice@buildyourcnc.com for further assistance.

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I buy a four axis kits and i connect all parts respecting the plan. The USB connector is using for électric alimentation of the When I want to activate the engine with the computer keyboard , nothing works. The current 5VDC since green light is on but when I check with a voltmeter each pin , then I see that there is no current. What's happening?

You can go here to find the diagrams and instruction on connecting the parallel breakout board:

https://www.buildyourcnc.com/item/electronicsAndMotors-parallel-breakout-relay

Also, please make sure to watch all of the electronics tutorial videos here:
https://www.buildyourcnc.com/CNCElectronicsandWiring.aspx

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I can't find the diagram to hook up the parallel breakout board