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Tech Head - The Technology Section
The Work Bench and Soldering Station
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<blockquote data-quote="Vipersan" data-source="post: 915371" data-attributes="member: 325666"><p>Not out of the woods yet it seems ..</p><p>The new 5amp switch mode arrived ...and so far appears to be ok handling the motor without failing...</p><p>I suspect due to the addition of in line negative temp coefficient resistors in the motor line ..</p><p>effectively giving the motor a 'soft start'.</p><p>A new issue has now presented itself ...and not so easy to resolve.</p><p>I need to understand better just how diseqc commands are received an dealt with in relation to stored positions..</p><p>I can send the dish anywhere using the remote control or by channel selection on the receiver...but only within a roughly 35 degree variance...??</p><p>To give an example I can send the dish from 0.8W to 34 W by remote or receiver without issue ..but 0.8W to 40W is a no go ..</p><p>The motor activates ...and heads off to 40W but overshoots 40W and continues to the limit switch.</p><p>The motor doesn't stop moving the dish ...but the selected position/command is ignored or forgotten along the way ?</p><p>I can get to the desired position by doing it in 2 stages ..</p><p>0.8W to say 20W ...and then 20W to 40W ...</p><p>It's as though the micro doesn't hold on to the 'issued' command long enough ?</p><p>Now ...if for example this is normal and uses a voltage maintained by an electrolytic then maybe I can find a solution ...</p><p>BUT if it is a timer built into the micros software ...I can't fix it without having access and re-writing the software.</p><p>I believe this problem has been calculated on typical journey time of a dish moving with an actuator powered at 36V ...and thus reducing this to 24v as it now is slows the travel ..resulting in a time out ..and the command is thrown away ..because the desired movement wasn't completed within a fixed time limit.</p><p>I -could- go back to using a higher voltage I suppose ...but although I have to wait longer ..I much prefer the motor/dish moving slower at 24V.</p><p>Or get used to making shorter arc hops..</p><p>This is indeed a calculated error imo...</p><p>If only I had a full schematic and and explanation of how the software works..</p><p>Suggestions and comments welcomed.</p><p>rgds</p><p>VS</p></blockquote><p></p>
[QUOTE="Vipersan, post: 915371, member: 325666"] Not out of the woods yet it seems .. The new 5amp switch mode arrived ...and so far appears to be ok handling the motor without failing... I suspect due to the addition of in line negative temp coefficient resistors in the motor line .. effectively giving the motor a 'soft start'. A new issue has now presented itself ...and not so easy to resolve. I need to understand better just how diseqc commands are received an dealt with in relation to stored positions.. I can send the dish anywhere using the remote control or by channel selection on the receiver...but only within a roughly 35 degree variance...?? To give an example I can send the dish from 0.8W to 34 W by remote or receiver without issue ..but 0.8W to 40W is a no go .. The motor activates ...and heads off to 40W but overshoots 40W and continues to the limit switch. The motor doesn't stop moving the dish ...but the selected position/command is ignored or forgotten along the way ? I can get to the desired position by doing it in 2 stages .. 0.8W to say 20W ...and then 20W to 40W ... It's as though the micro doesn't hold on to the 'issued' command long enough ? Now ...if for example this is normal and uses a voltage maintained by an electrolytic then maybe I can find a solution ... BUT if it is a timer built into the micros software ...I can't fix it without having access and re-writing the software. I believe this problem has been calculated on typical journey time of a dish moving with an actuator powered at 36V ...and thus reducing this to 24v as it now is slows the travel ..resulting in a time out ..and the command is thrown away ..because the desired movement wasn't completed within a fixed time limit. I -could- go back to using a higher voltage I suppose ...but although I have to wait longer ..I much prefer the motor/dish moving slower at 24V. Or get used to making shorter arc hops.. This is indeed a calculated error imo... If only I had a full schematic and and explanation of how the software works.. Suggestions and comments welcomed. rgds VS [/QUOTE]
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The Work Bench and Soldering Station
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