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Vex 1.0 © Carnegie Mellon Robotics Academy Inc. CRIMPING Introduction This presentation is the companion to Background / Resources / Crimping Guide slide.

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Presentation on theme: "Vex 1.0 © Carnegie Mellon Robotics Academy Inc. CRIMPING Introduction This presentation is the companion to Background / Resources / Crimping Guide slide."— Presentation transcript:

1 Vex 1.0 © Carnegie Mellon Robotics Academy Inc. CRIMPING Introduction This presentation is the companion to Background / Resources / Crimping Guide slide show For more detailed instructions, watch the slide show

2 Vex 1.0 © Carnegie Mellon Robotics Academy Inc. CRIMPING Overview In this presentation you will learn: How to use crimping pliers How to create custom cables and connectors for Vex How to determine your cable / connector needs In this presentation you will make: A 7½ foot motor extension cable Will connect a motor to the Vex microcontroller

3 Vex 1.0 © Carnegie Mellon Robotics Academy Inc. Why? Standard Vex cables are limited Might need different lengths Might need more extension wires than included in your kit How? Manufacturing your own cable is simple! You will use a crimping tool CRIMPING Making custom cables

4 Vex 1.0 © Carnegie Mellon Robotics Academy Inc. Ask yourself: What are you trying to do? What materials do you have or need? What is the configuration of the cable needed to complete your task? What length of cable do you need? CRIMPING Determine your needs

5 Vex 1.0 © Carnegie Mellon Robotics Academy Inc. You will need: Crimping tool > Molex 11-01-0208 Hand Crimper > Supports 22 – 24 and 30 – 36 AWG Wire strippers Tape measure CRIMPING Gather tools

6 Vex 1.0 © Carnegie Mellon Robotics Academy Inc. Vex cable parts: 22 AWG wire, 3 conductor cable Male Molex pins Female Molex pins Crimp housing CRIMPING Gather materials

7 Vex 1.0 © Carnegie Mellon Robotics Academy Inc. More on your cable: AWG (American Wire Gauge) is simply a measure of the wires thickness Notice the conductor cable has 3 wires inside (all 22 AWG) This type of cable is used for input and output in the Vex system If you do not have this wire available, substitute with 3 (22 AWG) differently colored wires CRIMPING Gather materials

8 Vex 1.0 © Carnegie Mellon Robotics Academy Inc. Measure the length of cable you need Make sure to leave yourself 6 of extra length, in case of a mistake For this example, we need a cable 7½ feet long; so it should be 8 feet total after adding the 6 inches If your cable needs to be a more exact length, be very accurate; once the pins have been locked into position, they cannot be removed CRIMPING Prepare the cable

9 Vex 1.0 © Carnegie Mellon Robotics Academy Inc. Cut the length of cable you measured Wire strippers usually double as wire cutters; look for a cutting edge on the blade CRIMPING Cut cable

10 Vex 1.0 © Carnegie Mellon Robotics Academy Inc. CRIMPING Separate wires Use wire strippers to remove 1/8 of insulation from each conductor (wire) Make sure to leave 1½ inches from the end so that you can strip them This cable has PVC tubing around the three wires (the grey covering) Trim this PVC covering 1½ inches around the three wires After trimming the covering, separate the three wires manually

11 Vex 1.0 © Carnegie Mellon Robotics Academy Inc. Use wire strippers to remove 1/8 of insulation from each conductor (wire) Make sure to place the wire into the proper gauge hole in your wire strippers Squeeze handles until the wire strippers bite through the insulation Slide insulation off the end of the wire, leaving the metal conductor exposed CRIMPING Strip wires

12 Vex 1.0 © Carnegie Mellon Robotics Academy Inc. We will now begin making the Vex connector Become familiar with your crimper Make sure you know how to squeeze the handles until the crimper unlocks CRIMPING Step 1

13 Vex 1.0 © Carnegie Mellon Robotics Academy Inc. Use the gauge guide (shown at right) to determine which site to use for your gauge of wire In our case, we must use site A (because we have been using 22 AWG wire) CRIMPING Step 1 continued

14 Vex 1.0 © Carnegie Mellon Robotics Academy Inc. The crimper holds the pin in place for you during crimping Locate the spring loaded clamp below the jaw of the crimper Raise the clamp with your finger, as shown CRIMPING Step 2

15 Vex 1.0 © Carnegie Mellon Robotics Academy Inc. Male pins plug into female pins For our example, we want our wire to connect the Vex microcontroller and a motor CRIMPING Pins Female Connects wire to motorConnects wire to Vex microcontroller Male

16 Vex 1.0 © Carnegie Mellon Robotics Academy Inc. Choose a gender of pin for this connector Place the pin into the open slot on the crimper while the clamp is raised - The male or female end goes in first - The pin cradle should face up or open upward CRIMPING Step 3

17 Vex 1.0 © Carnegie Mellon Robotics Academy Inc. The pin should move forward until the front of the pin cradle is against the spring loaded clamp properly loaded pin CRIMPING Step 3 continued

18 Vex 1.0 © Carnegie Mellon Robotics Academy Inc. Release the spring loaded clamp This will lock the pin in position The pin is designed to fit into this crimper - If your pin is crooked, or if the clamp does not clamp down properly, simply lift up the clamp and try again CRIMPING Step 4

19 Vex 1.0 © Carnegie Mellon Robotics Academy Inc. Notice that there are teeth on both male and female pins The wire must be positioned using these teeth as guides - Inner set of teeth should be over exposed metal wire - Outer set of teeth should be over insulation CRIMPING Step 5 Outer teeth: close around insulation Inner teeth: close around bare wire

20 Vex 1.0 © Carnegie Mellon Robotics Academy Inc. Using the guides in the first part of step 5, place the wire in pin cradle, as shown - The bare wire should touch the clamp CRIMPING Step 5 continued

21 Vex 1.0 © Carnegie Mellon Robotics Academy Inc. Squeeze the crimpers handles to secure the wire into the pin - Make sure to hold the wire steady so that does not move while crimping - Squeeze the handles until you feel them release CRIMPING Step 6

22 Vex 1.0 © Carnegie Mellon Robotics Academy Inc. Remove the wire from the crimper - Push on the bottom of the clamp to release the pin - Once you have reached this state, you cannot separate the wire from the pin without cutting the wire CRIMPING Step 7

23 Vex 1.0 © Carnegie Mellon Robotics Academy Inc. Repeat the steps 1 through 7 for each of the two remaining wires, as shown - Use the same gender pins on all three wires CRIMPING Step 8

24 Vex 1.0 © Carnegie Mellon Robotics Academy Inc. A crimping housing unit is shown at the right - Once the pins have been inserted into the housing, they cannot be removed - Pins only fit one way into this particular housing unit - Both male and female pins can fit into this particular housing unit CRIMPING Housing Insert pins here

25 Vex 1.0 © Carnegie Mellon Robotics Academy Inc. Place the wires in the crimping housing - The wires must go in order by color, as shown: black, red, and white - Once you complete this step, you will not be able to remove the wires from the crimping housing without cutting them CRIMPING Step 9

26 Vex 1.0 © Carnegie Mellon Robotics Academy Inc. Line up the wire with the housing - Make sure the locking tab on the pin cradle is facing up, as shown CRIMPING Step 10

27 Vex 1.0 © Carnegie Mellon Robotics Academy Inc. Slide the pin into the housing, as shown, until the pin is locked into position - Do not force the wire - The pin might make a clicking sound when it has locked into position CRIMPING Step 10 continued

28 Vex 1.0 © Carnegie Mellon Robotics Academy Inc. To test if your pin is locked into the crimp housing, gently tug on the wire, as shown CRIMPING Step 10 continued

29 Vex 1.0 © Carnegie Mellon Robotics Academy Inc. Insert the remaining pins into the housing - Remember the order of colors: black, red, white CRIMPING Step 11

30 Vex 1.0 © Carnegie Mellon Robotics Academy Inc. Repeat steps 1 through 12 for the other side of the wire Check your completed connector against the official Vex connector CRIMPING Step 12

31 Vex 1.0 © Carnegie Mellon Robotics Academy Inc. Connect the female connector to the motor Connect the male connector to the Vex microcontroller Be sure not to insert these wires backwards; refer to the pictures at the right Turn on your robot and test the motor with your radio control transmitter CRIMPING Testing


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