STEPPERSTUFF.COM ERRATA
Listed below are known errors. We apologize for any inconvenience these errors may have caused. | |||||||||||||||||||||||||
Easy Step'nVersion 1.0 | |||||||||||||||||||||||||
Page 14,15,18, and 19 - The diodes are not shown in the diagram of the test board in use. Page 37 - In the pin diagram, Vdd is power, not ground. Page 48 - In the pin diagram, Vdd is power, not ground. Page 62 - Schematic - There is no +5V connection to the ULN2803A board. The terminal block at the top of the ULN2803A board should have 2 terminals, not 3. Page 65 - Schematic - There is no +5V connection to the TIP120 board. The terminal block at the top of the TIP120 board should have 2 terminals, not 3. | |||||||||||||||||||||||||
| Page 71 --Last line: input high, output high | |||||||||||||||||||||||||
| Page 121 through 126--Refers to the SLA7024M Unipolar Driver-- Through a sharp reader's experience, our own mistakes, and the effort required to correct them, we have determined that the SLA7024M experiment presented in Easy Step'n is not suitable for experimenters because tweaking of the IC manufacturer's recommended circuit may be required to obtain proper performance when driving a specific motor. The SLA7024M and the manufacturer's tech support are excellent. The hand tailoring required is fine for experienced engineers developing a commercial product, but not for the experimenter just learning about stepper motors. Please ignore pages 121 through 126. The concept is correct, but making it work for a given motor can be a bit of a trick in my experience.
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| Page 147 -- The Sharp Microelectronics sensor (photointerrupter in Sharp terminology) GPIS55 has been replaced by the GP1S56T which is currently available from Digi-Key. The output of the circuits shown in both schematics on page 147 should be connected to a 270 ohm resistor in series with an LED connected to ground. This LED serves as an indicator. If the sensor slot is blocked, the indicator LED will be off. The terminolgy used in the description is wrong or inconsistant. Please make the following changes:
This page last updated February 22, 2008 |