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Author Topic: CVA-01 HMS Queen Elizabeth  (Read 18140 times)

johnv

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Re: CVA-01 HMS Queen Elizabeth
« Reply #175 on: May 23, 2020, 05:21:09 PM »

Hi Bob it's John v all looks very good. We'll done. I  knew you would do it. Great job cheers John
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raflaunches

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Re: CVA-01 HMS Queen Elizabeth
« Reply #176 on: May 23, 2020, 06:17:08 PM »

Hi Bob


These are the article pages I mentioned- if you like I can send you some scans and email you with them. PM me with your email address and Iíll send them to you. Hope they help.
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Nick B

Help! The penguins have stolen my sanity, and my hot water bottle!

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derekwarner

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Re: CVA-01 HMS Queen Elizabeth
« Reply #177 on: May 23, 2020, 11:55:29 PM »

The side lift motion by chain is great Bob  :-))


Are you using just one servo drum [endless?] for the lift raise & lower?...[we just see a glimpse of the drum to the left for a second]


If so, an ACTion P96 Servomorph would give you great control over adjustable [desired] speed and chosen set points [totally repeatable]


Could certainly be wurth reading the spec sheet

https://www.componentshop.co.uk/pdf/pdf.jpg

Any tendency for the drive to hop or jerk, could be countered by adding some sheet lead into the base of the lift floor plate fo add to stability


Derek
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Derek Warner

Honorary Secretary [Retired]
Illawarra Live Steamers Co-op
Australia
www.ils.org.au

Rob47

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Re: CVA-01 HMS Queen Elizabeth
« Reply #178 on: May 24, 2020, 11:16:02 AM »


Derek
No servos were harmed in the making of this lift.  I tried all sort of methods, including servo slower, but it is not effective when trying to control two servos.. Solution is two small high torque right angle gearboxes, running at 3 RPM, no other electronics need, simply on/off/on switch and a twin relay. Works a treat ,if possibly tad slow but that can be changed later, this at least proves the system.


Bob


The side lift motion by chain is great Bob  :-))


Are you using just one servo drum [endless?] for the lift raise & lower?...[we just see a glimpse of the drum to the left for a second]


If so, an ACTion P96 Servomorph would give you great control over adjustable [desired] speed and chosen set points [totally repeatable]


Could certainly be wurth reading the spec sheet

https://www.componentshop.co.uk/pdf/pdf.jpg

Any tendency for the drive to hop or jerk, could be countered by adding some sheet lead into the base of the lift floor plate fo add to stability


Derek
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I will finish this model

derekwarner

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Re: CVA-01 HMS Queen Elizabeth
« Reply #179 on: May 24, 2020, 11:38:49 AM »

Thanks Bob...well explained  O0 ...the proof is in the pudding & the end result is   :-)) ..I do not think the raise/lower speed is too slow... Derek
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Derek Warner

Honorary Secretary [Retired]
Illawarra Live Steamers Co-op
Australia
www.ils.org.au
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