Mesa 7i97T unresponsive analog outputs
- matasbuk
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						15 Apr 2025 18:22				#326394
		by matasbuk
	
	
		
			
	
	
			
			 		
													
	
				Mesa 7i97T unresponsive analog outputs was created by matasbuk			
			
				Hello, trying to setup the 7i97T, but output 0 always seems to be at 4.55v no matter what, its enough to power up the board and not connect it to anything. Output 3 is the same. other outputs stay at 0 and do not change through halshow then I enter value manually. Even though they are enabled and scale set. My .ini and .hal files are attached.			
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						15 Apr 2025 18:38				#326398
		by PCW
	
	
		
			
	
			
			 		
													
	
				Replied by PCW on topic Mesa 7i97T unresponsive analog outputs			
			
				If any analog output is not close to 0V at power up, (and no output mis-connections)
there is a hardware problem (perhaps a damaged op-amp) on the card and it needs repair.
					there is a hardware problem (perhaps a damaged op-amp) on the card and it needs repair.
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						15 Apr 2025 19:27				#326401
		by matasbuk
	
	
		
			
	
			
			 		
													
	
				Replied by matasbuk on topic Mesa 7i97T unresponsive analog outputs			
			
				Tried with everything except power disconnected, tried to connect the drive, but the drive would proper forward with no command with stable speed with LinuxCNC off. Channel 3 was never even attempted to connect. Other channels are unresponsive.			
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						15 Apr 2025 20:43				#326407
		by PCW
	
	
		
			
	
			
			 		
													
	
				Replied by PCW on topic Mesa 7i97T unresponsive analog outputs			
			
				If you have nothing connected to the 7I97T but 5V power and any analog
output is not close to 0V, the analog output circuitry has been damaged somehow.
This may occur if an output was inadvertently shorted to say +24V or
connected before a common ground was established between the drive and
the 7I97T.
					output is not close to 0V, the analog output circuitry has been damaged somehow.
This may occur if an output was inadvertently shorted to say +24V or
connected before a common ground was established between the drive and
the 7I97T.
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