I`m currently using a Gecko G540 drive module to drive the stepper motors. This module has the ability to drive up to 4 stepper motors. They label the connections as XYZA - we`ll connect the C-axis stepper to the A output and leave the Y output unconnected. Gecko provides a wealth of technical information about stepper motors in general and their
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products in particular. Take the time to download their information, read it, and understand it. There are some nice things about this driver. It has the ability to provide 10 micro-steps for every full step of the motor, thus increasing the smoothness of cuts by 10X. It also has an adjustment to smooth the motion of the motor at slow speeds. This works particularly well because we tend to use the motors in this slow range where smoothness is important. Their spec sheet says the inputs (for connection to the limit switches) are 5-volt (TTL) compatible. This is incorrect! The G540 tries to pull the inputs up to 12 volts from an internal supply. If your limit switches are not open circuit (or open collector able to withstand a higher voltage) then you will need some additional interface circuitry (see below). The G540 automatically goes into a power-saving mode where it reduces the motor current by 70% whenever the motor is idle more than 2 seconds. On the one hand, this is nice to keep your motors cool. However, there is a slight "twitch" in the motor when it is suddenly switched to a lower holding current. This can leave a line in your cut work. It can easily happen when you move the cutter into the work (Z-axis, for example) and then start cutting a rosette pattern. The Z-axis won`t move for a while and the G540 "helps" you by reducing the current to the Z motor. You can`t turn off this option. Get yourself a big red...
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....
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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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