unit of magnetic field distance. Since electromagnet diameter is 3.175cm, our magnetic field distance will be approximately 0.95cm. Due to the fact that we also had magnets on the top of the chess board our magnetic field distance will be bigger than 0.95 cm. The EM 137 Electromagnet Company Company” was our second choice. This “APW electromagnet has 3.47cm diameter and 33-44lb holding value. The voltage supply for this magnet is 12V. Also it has standard thru hole mounting and includes brackets to hold it in place. Our last choice was ER2-103 Electromagnet Company Magnetic Inc.” The “Industrial magnet has the same diameter as our previous two choices. Different voltage supply 24 V and smaller holding force value. This electromagnet also is twice as expensive as another two electromagnets. We found during our research that there are not many companies that are selling small, powerful and cheap electromagnets. We think the reason is that not many DIY projects involved small and strong electromagnets. But on the other hand there are a lot of inquiries on the Internet from people about how to create electromagnets at home. A comparison of the electromagnet types is made in Table 10. 10 - Electromagnet Specification Comparison Model of R-1207-12 EM 137 ER2-103 electromagnet Voltage, V 12 12 24 Current DC DC DC Duty Continuous Continuous Continuous Watts 3.3 5 4.2 Amps 0.28 0.41 n/a Holding Force, Lbs 45 33 22 Weight, Lbs 0.24 0.24 0.4 Diameter, cm 3.175 3.493 3.175 Height, cm 1.905 2.06 n/a $ 40 29.24 76.06 The size of the positioning system is also one of the important factors for us. We didn’t want to create big and bulky chess board. Based on specifications boards have approximate size of not bigger than 70cm by 70cm and height of a board should not exceed 30cm. Based on this data we need to choose optimal size and strength of the motors. In addition to the electromagnet we need to choose some magnets needed to be installed into chess pieces. After some research, we realized that there are many places
unit of magnetic field distance. Since electromagnet diameter is 3.175cm, our magnetic field distance will be approximately 0.95cm. Due to the fact that we also had magnets on the top of the chess board our magnetic field distance will be bigger than 0.95 cm. The EM 137 Electromagnet Company “APW Company” was our second choice. This electromagnet has 3.47cm diameter and 33-44lb holding value. The voltage supply for this magnet is 12V. Also it has standard thru hole mounting and includes brackets to hold it in place. Our last choice was ER2-103 Electromagnet Company “Industrial Magnetic Inc.” The magnet has the same diameter as our previous two choices. Different voltage supply 24 V and smaller holding force value. This electromagnet also is twice as expensive as another two electromagnets. We found during our research that there are not many companies that are selling small, powerful and cheap electromagnets. We think the reason is that not many DIY projects involved small and strong electromagnets. But on the other hand there are a lot of inquiries on the Internet from people about how to create electromagnets at home. A comparison of the electromagnet types is made in Table 10. 10 - Electromagnet Specification Comparison Model of electromagnet R-1207-12 EM 137 ER2-103 Voltage, V 12 12 24 Current DC DC DC Duty Continuous Continuous Continuous Watts 3.3 5 4.2 Amps 0.28 0.41 n/a Holding Force, Lbs 45 33 22 Weight, Lbs 0.24 0.24 0.4 Diameter, cm 3.175 3.493 3.175 Height, cm 1.905 2.06 n/a $ 40 29.24 76.06 The size of the positioning system is also one of the important factors for us. We didn’t want to create big and bulky chess board. Based on specifications boards have approximate size of not bigger than 70cm by 70cm and height of a board should not exceed 30cm. Based on this data we need to choose optimal size and strength of the motors. In addition to the electromagnet we need to choose some magnets needed to be installed into chess pieces. After some research, we realized that there are many places
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