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#1
 
11-12-2009, 04:36 AM
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What is the typical output voltage coming out from Parallel port as I get random voltages range from 1.6-3.0V (no breakout board….directly measuring from the port)? My understanding is TTL low is 0-0.8V and high is 2.6 to 5V. My driver accept Pul-Low 0-0.5 V which I set “MACH3 Setup menu” STEP pulse setting at ACTIVE LOW so the drive work ok. Yet, range of random voltage output is throwing me off…Any advice? Thank you Jeff  |
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1.6V-3.0V random signal voltage parallel signal from output – Any advice? 
Linear Mode
