The motor controller is a custom built box that is a combination of custom printed circuit boards, the Pico Systems Universal Stepper Controller card, gecko G320 motor drives and internal power supply. The motor controller also links to the servos which require DC power and motor encoders, as well as limit switches which detect when the table its
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nearing the either maximum length of each ballscrew. The Universal Stepper Controller connects to the computer`s parallel port via a DB-25 cable and the EMC2 software comes with a driver ( documentation ) that handles the driving this controller. There is also sets of EMC configuration files that are really useful for working with the USC card and EMC. The documentation for the connections on stepper controller is here and signals connectors control step and direction for each motor, as well as monitoring the status of the limit switches. The best way to understand the motor controller is to take a look at this drawing is a circuit diagram of custom circuit board called the USC_bridge that serves as a link between most of the components of the motor controller. This shows how the USC_bridge connects to three connectors ( P2, P4 and P5 ) of the Universal Stepper Controller. Part of the motivation for making the USC_bridge was that it broke the connects to the rest of the system into more logical components so for example the bridge has individual RJ-45 connectors to use "cat-5" ethernet cables to connect to each E3 servo motor encoders made by US Digital, as well as separate cat-5 connects to limit switches and emergency-stop switches. The limit switches are not mechanical switches but are actually composed of optocouplers - these also require a little extra on board circuitry to drive the emitter and detector on the...
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to....
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The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the....
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,....
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the....
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
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