Time for my maiden post on here. let me give you some details:
take your basic bruder cat 320 toy since we all have one of these.
im building/converting it to a functional excavator. total weight will be 20-30 lbs incl the ballast i'll squeeze all over the body.
the boom has been extended 1.5" for the lower section and ~3" for the main section for imo more realistic reach. epoxy and metal internal construction so the arms are literally solid pieces. the total arm will weight ill estimate at 4-5lbs, maybe less. ill know by wednesday when im done putting it together.
That said,
Control valves
do i use a 3 spool (3 way) and use tsplitters for the dual main arm cyllinders so both work off one hydraulic channel.
or
do i use a 4 spool (4way) and control each cyllinder independently through yharnessing the servos for the tandem cyllinders.
which way is better to do it?
cyllinders
what bore size would you recommend? it must be 2.5mm ID hose size however (3mm nipple standard fitting). 5mm system i haven't located but it sounds expensive and custom order.
power and speed should be realistic. im not going to go dig up my yard but it needs to go through wet sand and loose wet soil/mud without breaking or choking up.
pump
the 350ml one from wedico/garden az dealer that comes with the "free" filter
or one of these
http://www.der-getriebedoktor.de/sho...s.php?aid=2701
honestly they look exactly the same? but the leimbach claims 380ml and 12bar at 12volts vs the wedico/noname one at 350ml 10 bar at 12v (which from what i gather should be adjustable on BOTH pumps via a screw from 10 to 16 bar anyway)
on a side note:
i've been swapping mail back and forth with vario about their m13/1 kit to find out what actually is part of it but the language barrier is IMMENSE and im getting frustrated. also they seem to not receive half the text i send. so still working on getting the component list in the m13/1 package for 1100euros and change they sell.
im hoping it includes the cyllinders. now if it does, would that package be worth it ( price is comparable to me getting each component separately). assuming me and the vario people can figure out a common language in the next 400-600 emails.
