The ds 160 lmi is the same as i have and is not all that complicated of a system...if it was programmed to have the weight of the hydraulic spool, it would have to always be the same on top (net) number... seems to me it would vary a little bit depending on boom angle anyway...curious now.
CRANE!! AM I DREAMING?
- Thread starter ROYCE
- Start date
So when you set your crane up first thing in morning. You boom out to the tree your going to remove. You then look at your lmi to see what your capacities are, correct? So the number that your Lmi is reading is what your good for, correct? Then you base your picks off that weight.
My problem is that I am trying to determine if the LMI is set up incorrectly, or if it's just that I have to take 70% of what the number reading is.
Lumberjack
Branched out member
Your LMI should tell you your limit for any position, and an approximate load currently being withstood by the crane. An LMI would not display a number for capacity that you have to subtract from in your head.
Something is wrong with your LMI or its settings.
Something is wrong with your LMI or its settings.
Yes, that is what I thought. I figured it out. The setting was set for mid-span outriggers. Once I changed it the LMI now shuts me off at exactly what the weight is that I can pick. That is what I wanted. Thanks for the help guys!
BigWood
Participating member
- Location
- Toronto, Canada
Deduction on the load chart for a stowed jib varies depending on boom length even though it's on the heal section. As it was explained to me, it's the same for a hose real. The deference being that the not a deduction on the.chart it shows up as additional load on the hook.
BigWood
Participating member
- Location
- Toronto, Canada
Out of curiosity, what does your lim read with nothing on the hook?
200 pounds.
Today out of curiosity I switched my LMI program from Jib stowed to no Jib stowed. I had the boom in the air and was good for 4400 with the jib stowed. Once I changed the settings ( I was curious to where the change would be noted, on the hook weight or the pick weight) After switching my pick weight increased to 4700. So with the jib stowed they are deducting 300 pounds. My hook weight stayed the same at 200 pounds.
Jeff
Branched out member
- Location
- Marlborough, MA
I hope you remember or wrote down what some of the numbers were. That way, when you're in a spot where you might have to short-jack it, you'll know ahead of time what the capacities are and how much it's going to hurt you.
classictruckman
Participating member
- Location
- Ottawa Valley, Ontario, Canada
He should have a mid-span chart, and maybe a fully retracted chart. Not to mention he could set the lmi for the outrigger length.
Yeah, I have a mid span outrigger chart that is aluminum and hangs right in front of my feet. It is on page four. I can just reference the chart as needed. I'll be honest, short jacking it kinda makes me nervous. If I ever did that I would program the lmi for that setting because it will stop me before I boom down too low or take too much weight.
Its crazy though, when you look at the charts it looks good on paper. But, anything beyond a 50 foot radius with my crane is actually not a ton of weight. What I would probably do is take the tops out of the trees and then shorten the stuck as much as possible to get as much more weight as I could. If needed. I can see how this crane might be too small in a year or two
I often pick all the tops and remove the jib on my 22 ton before picking the buts. Lot better chart. That 50' radius deal is the curse of the boom truck where the difference between a real crane and a boom truck show up. I almost bought a altec 38-127 but the chart around 80' was lousy
I'd rather take time to swing the jib and have enough chart to take bigger picks.than make 10 extra cuts
I'd rather take time to swing the jib and have enough chart to take bigger picks.than make 10 extra cuts
Whats your minimum angle with the jib on?
Yeah, I think that once you get beyond 50 feet having a counter weight makes a big difference in your charts. That is where the true cranes come in handy and not the boom trucks. However, I still like this boom truck I have and if your a smart operator it can make lots of money. Just have to know how, and where to set it up. I am going to try to not pick too much further then 50-55 feet if possible.
My jib angle is not to go below 54 degrees. I would be good for a height of around 135 feet at that 54 degree angle, with a radius of 85 feet and a capacity of 900 pounds. Not great for tree work, but possible for setting trusses or something.
tc262
Branched out member
- Location
- SE Wisconsin
Or as a tie in for a climber on a scketchy tree with limited equipment access!
