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Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
EGIS motor
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<blockquote data-quote="dafydd" data-source="post: 1138724" data-attributes="member: 417969"><p>Please forgive me for poking my nose into this thread, but as someone who was involved in the design of large servo positioning systems (many years ago, in a previous century!), I have been following it with interest.</p><p>It appears that you are close to an ideal solution. Reducing the motor drive voltage proportional to the error (distance from final position) is the correct way to go, as you have done.</p><p>Are you using velocity feedback to overcome inertia? A signal derived from your pulse rate and used to reduce motor drive? This may permit you to raise the minimum drive voltage to avoid motor stalling before arriving at your final position. Of course the minimum drive voltage and the amount of velocity feedback would need to be adjusted for each individual installation as there will be variations in the motor characteristics and inertia.</p></blockquote><p></p>
[QUOTE="dafydd, post: 1138724, member: 417969"] Please forgive me for poking my nose into this thread, but as someone who was involved in the design of large servo positioning systems (many years ago, in a previous century!), I have been following it with interest. It appears that you are close to an ideal solution. Reducing the motor drive voltage proportional to the error (distance from final position) is the correct way to go, as you have done. Are you using velocity feedback to overcome inertia? A signal derived from your pulse rate and used to reduce motor drive? This may permit you to raise the minimum drive voltage to avoid motor stalling before arriving at your final position. Of course the minimum drive voltage and the amount of velocity feedback would need to be adjusted for each individual installation as there will be variations in the motor characteristics and inertia. [/QUOTE]
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Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
EGIS motor
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