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Old 01-30-2011, 03:26 PM
modelman modelman is offline
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Default Re: Unit Cable Hoe

SmallHaul-I will enjoy watching this build! These old machines are my main interest. Do you have any worries over the hi amp draw you will be putting on the servos for track drives? I didn't think servos would handle much continous load.
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Old 01-30-2011, 03:42 PM
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SmallHaul SmallHaul is offline
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Default Re: Unit Cable Hoe

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SmallHaul-I will enjoy watching this build! These old machines are my main interest. Do you have any worries over the hi amp draw you will be putting on the servos for track drives? I didn't think servos would handle much continous load.
Well, here is what I am thinking... The crowd drum on my doepke dragline has enough power to fairly easily pull the entire crane up hill on (free wheeling on its wheels) and that is one 200oz inch servo. So, I figure if I have one 200oz inch servo on each track that should be more than enough power to propel the entire crane up a steep hill. Worst case scenario is the 200oz inch servos are not strong enough and then I'll just have to swap them for Hitec 7955tg servos (well over 300oz inches of torque @ 6volts) that cost $100 a piece. I have one of these servos in my Mack dump truck running the dump mechanism and the servo has so much power that even if you overload the bed with dirt the servo doesn't even sound like it is working hard to lift & dump it.
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Old 01-30-2011, 03:58 PM
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Default Re: Unit Cable Hoe

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Originally Posted by SmallHaul View Post
Well, here is what I am thinking... The crowd drum on my doepke dragline has enough power to fairly easily pull the entire crane up hill on (free wheeling on its wheels) and that is one 200oz inch servo. So, I figure if I have one 200oz inch servo on each track that should be more than enough power to propel the entire crane up a steep hill. Worst case scenario is the 200oz inch servos are not strong enough and then I'll just have to swap them for Hitec 7955tg servos (well over 300oz inches of torque @ 6volts) that cost $100 a piece. I have one of these servos in my Mack dump truck running the dump mechanism and the servo has so much power that even if you overload the bed with dirt the servo doesn't even sound like it is working hard to lift & dump it.

WOW... Scott speaks Greek Or at least that's what I am hearing.
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RIP FreddyGearDrive 2-12-59/12-19-11

Rims and Tanks by ihbuilder / Grill and Visor by Brian in PA / Mirrors, Front and Rear Bumper, Back of Cab Lights, and Steering Arms by tc1cat / Fenders by Stylin n Profilin / Frame Rails by The Late Freddy Gear Drive
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Old 01-30-2011, 04:46 PM
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SmallHaul SmallHaul is offline
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Default Re: Unit Cable Hoe

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Originally Posted by Dreamweaver View Post
WOW... Scott speaks Greek Or at least that's what I am hearing.
HA! Here is how much power one 200 oz inch servo has.

http://www.youtube.com/watch?v=RDJwvo3claI
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