Author: Seongju Hong
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2019.07.03(pm): How do I change the frequency of PWM pin to control the high-performance DC motor?
First, let’s look at the motor driver used. I used the DMD-200 motor driver. The pin map of the motor driver is shown below. The leftmost GND and VCC are the connecting parts of the power supply, and M1 and M2 are the connecting parts of the two poles of the motor. The PWM on…
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2019.07.03(pm): How to use Oscilloscope
An ‘oscilloscope’, previously called an ‘oscillograph’ and informally known as a scope or o-scope, CRO (for cathode-ray oscilloscope), or DSO (for the more modern digital storage oscilloscope), is a type of electronic test instrument that graphically displays varying signal voltages, usually as a two-dimensional plot of one or more signals as a function of time. Other signals (such as sound or vibration) can be converted…
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2019.06.24(pm): Converting belt gearing to coupling using a drilling machine
The coupling I have is a bending coupling. This coupling is not appropriate because I need a rigid and well-fixed shaft. So I plan to make a rigid coupling with this belt gear fixed shaft. Drill the inner diameter of the coupling to 6mm to fit the motor shaft, and make a 3mm hole in…
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2019.06.24(pm): Cutting the Carbon pipe
Even a scrolling saw can cut carbon pipes, but the vibration is severe and takes a long time. Makita 305MM Slide Compound Mitre Saw 1650W When cut with the Makita blade saw, the noise was very bad, but it was neat and precisely cut, and the length of the saw was lost from the carbon…
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2019.06.24(pm): Long-life high output bevel reduction gear Motor Test
Today, I tested a new motor. The following is the specification of the motor. The new motor, the long-life high output bevel reduction gear motor BG42-4266-1290, is four times bigger than the maximum torque of the JGY370 worm geared motor. Speed control is also possible with dedicated motor driver.
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2019.06.19(am): Motor Driver DMC-10A DC12~30V MAX 200W Specification
DMC-10A DC12~30V MAX 200W https://www.motorbank.kr/goods/goods_view.php?goodsNo=1000007943
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2019.06.17(pm): The process of combine the small robot using gear
The picture above shows the combination of the gears I painted directly on the Rhino. I found that the legs were not perfectly symmetrically joined when they were assembled, and I disassembled them all again. I am disassembling and reassembling all of my legs, which is too delicate and takes too long.