Jump to content

DavidWest

Premium Members
  • Posts

    51
  • Joined

  • Last visited

Everything posted by DavidWest

  1. http://steadicam.com/filmUltraManuals.html
  2. http://cgi.ebay.com/Goko-Telecine-Player-T...1QQcmdZViewItem buy it , use it, then sell it and probably get all of your money back out of it.... (just one way....)
  3. lkarman <--------- brings up a great point.... all you have to do is explain to your wife that you are the ONLY one allowed to use the remote or else you cant deduct it... i think i need one now considering that....
  4. I'd definitely ask a professional ..... there, disclaimer applied.... you are a video professional... the format is changing.... you must be able to analyze your work in the medium for which it is intended... i would be more worried about deducting cable.... :D
  5. http://shop2.outpost.com/category/Outpost/...st+LCD+Screens/ thinking outside the box, but fryes is open late..... could you wire an xlr adapter and make something like this work??? most of the baby telepromters that i have been looking at project on the glass inside of a shadow box... so the brightness of one of these might work.... the price is right on some of them.......
  6. DavidWest

    arm grease

    makes sense... Thanks for the tip.....
  7. DavidWest

    arm grease

    what grease are people using in their arms?? there has been a lot of changes in the last few years in the petrochemical industry... a lot of the older greases have been redone because of the sodium nitrate hazard. what grease is being used in your arm?? (i have one apart and need to regrease before reassembly) thanks, david
  8. you might try a reward for the return of.... no questions asked type of thing... whoever stole it might not have really known what it was or how small of a steadicam world it is... you might also try looking in the local pawn shops after you have reported it stolen.... either way i will keep an eye out as i am constantly looking on ebay and in the forums for the remaining parts of my frankenrig.......
  9. http://steadicam.com/manuals/ultra/Page6Co...ontrolPanel.pdf that link shows the same pinouts for the current ULTRA.....
  10. Mikko.... you got it... is is because of the weight of the engine.... the "pivot" point actually is where the outriggers touch the ground, not the front tires... for the calculations the CG is the pivot point... THE CG is critical to all load calcualtions.... if you move the mass of a crane boom (thousands of pounds), a fire ladder (at least a few thousand lbs), or even an engine (+- 1000 lbs) from one side to the other of the cg it makes a huge difference. if you dont overcomplicate it with lots of math and therotical physics it becomes easier to understand--- ie, we have the real world practical physics lessons from a playground when we were children.... the seesaw or teeter totter..... fatkid on one end, skinny kid on the other... everything pivots about the CG... (you move the fat kid closer to the CG to give the skinny kid a leverage advantage to achieve balance) everthing is pivoting about the CG.... ladder in front/ ladder in back.... either way, everything pivots about the CG... arm in front/ arm in back.... either way, everything pivots about the CG... so, in my opinion, the two most important factors on how the point of attachment effect the human body are: 1. where is the cg and how does it effect comfort and wear/tear... 2. Method of attachment- the rear mount seems to pull on the hips and push on the back...(sort of like a good easy chair?) you can think and think and think and think, but just ask and see which one people like better and try and see which one you like better..... .... then watch, to make sure that no long term ill effects are observed with whichever type you choose....
  11. http://www.huddlestoncrane.com/cco/sampleQA.html could anyone here explain number 19 ??? here is an example... http://www.gatwoodcrane.com/Load%20Charts/...oad%20Chart.pdf
  12. my apologies if i have offended you Paul.... You spent a good deal of time with the drawings and your concept is basically correct... i am only talking about a very smallshift in the CG within the center of the body... the ladder has mass.... moving an object from one side of a balanced teeter totter to the other changes the CG position. imagine a teeter totter.... and it is balanced with a ladder in the seat of one side. in order to put the ladder on the other side and have it be balanced you would have to change where the teeter totter attached to the main board. to use the drawings as an example, if you could balance the truck with the rear ladder on the head of a pin you would find a point in the center of the truck where all four wheels came off of the ground. if you then moved the ladder to the front of the truck the cg would now shift and the pin would have to be moved to balance the truck.
  13. i guess, with fewer words, that is what i disagree with. i think that you operate under and up to the tipping point. but not at the tipping point. but more to the point :) , i was trying to say that the cg would not be in the same place in the drawing if you moved the ladder.... the load chart for a truck crane is very different for picks made over the front than over the rear (except for some of the newest that balance the undercarriage differently)... your drawings would suggest the load chart would be the same... likewise i think that when you lean back, as in your example in the last post, you are also changing the CG... fundamentally- i am not trying to say that you are right or wrong about much of anything - i am just trying to say that the drawings are not completely showing all of the forces, and they dont show the shifts in the cg when the ladder is moved from the front to the back.... likewise they dont show what is happening as you lean back (this could be likened to using a crane on a steep incline)= much more mechanical stess failure than tipping likelihood...
  14. hmmmm.... i think i understand what you are trying to convey....... my experience is more with cranes than firetrucks... but the standard truck crane is still similar to your drawing..... i guess what i am trying to say is that the tipping point (although i have done my share) is not where the crane is supposed to be operated... unless im wrong, we dont really want to operate a steadicam at the tipping point either. I assume that you should be able to extend the boom of your steadi straight out in front of you without tipping over whether mounted from the front or the back?? likewise there is a shift in the forces from the rear outriggers of a crane (or firetruck) to the front as you extend the load away from the center of gravity until you reach the point of tipping. ----until you reach that point of tipping the loads are shared with all contact points to the ground.... not equally shared, but shared. --- there are two main types of load failure here (or in a load chart for a crane). one would be tipping and one would be mechanical failure.... the cranes that i have run seemed to be more prone to mechanical failure at certian angles and more prone to tipping failures at other angles relative to the undercarriage. im probably not making any sense.... your physics seem right to determine the tip point, but do not seem to reflect what happens the rest of the time... if you move the ladder to the front of the fire engine the CG changes.. (but it is still inside the body of the truck) if you move the steadicam from the front to the rear i think the cg changes too.. is this shift enough to be concerned about? i dont know... i think the main effect that back mounted vest has is that it crushes different parts of the body... but, in the words of seargent schultz, "i know nothing..." as i have never worn a back mounted vest.... good or bad? depends upon what feels good to the operator i would guess as long as no long term health effects show up years from now....
  15. Paul.... nice drawings..... an older thread, so maybe no response, BUT..... the first drawing, ladder from rear.... has a downward force shared between the two wheels.... the second drawing with the ladder on the front has all the force concentrated upon the front tire while the rest of the vehicle is being "pryed upwared".... in terms of cranes, the first drawing could lift closer to the point of structural failure while the second would be more tip prone.... but most importanly VERY different forces are being applied to the truck and ie your anology, the body....
  16. DavidWest

    ProGear

    Blue Spring EFP From Rig..... probably the choice that i too will eventuallly follow..... i dont have to impress anyone but myself.... i might eventually get one of the even more expensive arms, but what Rig is offering is a slight modification of a tried and true design.... (at a price i can almost afford)....
  17. xddj doesnt the service manual only have 12 pages?? could you make a little sub board that switched between two diffenent pots one adjusted for each aspect ratio??? neway... i have the same monitor... glad to get the schematics though... thanks.......
  18. DavidWest

    ProGear

    It is sad, as most of his parts are of good quality and for a good price. But if after-sale service is lousy or non-existent, it´s better to look for other brands! Hi Rob, one thing about machining metal that is invisible is temperature problems.... if the piece is not kept at a certian temperature during the machining process hot spots will cause the material to have weak spots... the part will look EXACTLY like a good part, but just wont be as strong... one solution is heat treatment but that is an art in itself.... Tiffen and GPI seem to have incorperated many designs and practices from the southern california aircraft industry.... their designs all seem to scream aviation engineer to me anyways.... but more importantly, they do seem to stand behind their product plus you have a larger group of people using their gear to let everyone know if problems are developing... ive been piecing together my gear for some time now, but i appreciate the genius that i see in the steadicam and GPI designs... just got to save a little more $$...
  19. Mikko not to spoil plot lines for you,,,,,, but one of the oddest things about watching them in "order" is you dont "automatically Hate" one of the villians.... SW strikes a universal father son conflict chord. to see them in "order" looses some of the power of that understanding... a few more weeks and you can see what i mean if you imagine them in the order the rest of us saw them in.....
  20. thanks Mikko,,, i had missed the other post... i had emailed this guy to prove to myself that it was the same guy, but i see that i am not the only one to have done so.. SO, in the famous words of the church lady from SNL,,, "...nevermind..."
  21. M516 runner kit. this is for sale on ebay.... the seller is posting posts like this in steadicam groups all over the web.... he claims to be some "happy customer" but turns out to be the guy doing the selling... pretty sad when your product is so bad that you have to pretend to be a happy customer..... this unit is on the LOW end of the spectrum of rigs, even below most homebuilt units... and before i get criticised for flaming, email me if you wish and i will tell you how you can tell this is the same guy that is selling the "rig" made from surplus lawnchairs....
  22. forklifts are fine IF: you are inside a "man basket" which is attached to the forks via channels and chained to the mast, and IF: you dont mind getting a hand chopped off now and then.... the biggest danger when putting a man on a forklift is the way that the mast raises or lowers creates pinch points that will cut off your hand or arm or whatever you happen to let rest in the wrong spot.... the other hazard is since the rig is NOT designed to carry people- most riggs will come crashing down if you loose a hydralic line... this could result in a very serious injury.... is it done in industry, yes fairly often... is it unsafe, ... yes... if you HAVE to do it, keep your hands away from the mast (the part that goes up and down) ..... (also keep an eye out for power lines).. Or. OSHA says... "Vertical mast forklifts can be used to lift workers as long as a safety platform (?basket?) with a standard railing is used and secured to the carriage. Shear point guarding must also be provided between the worker(s) and the mast. The forklift must be attended while workers are in it and always consider the weight in relation to the trucks capacity and stability." and BC regs- "Never elevate workers on forks, pallets, or loads." http://smallbusiness.healthandsafetycentre...?ReportID=32813 or calif http://www.montereycountyfarmbureau.org/forklift_safety.htm
  23. save your money..... look: http://www-2.cs.cmu.edu/~johnny/steadycam/ if charles is the Charles from the Homebuiltstabilizer site you guys might want to check out his site... some very innovative people there for those not working entirely in the industry... i am slowly putting together a rig, and using mostly true steadicam parts because you cant really beat the quality,,,,, and the time it takes to machine the parts- even if you had all the machine tools- is a very great demand... steadicam uses Ti on many parts and skilled machinists.... i will be making whatever i cant afford for now, but eventually buy the "real" thing... HOWEVER, opening up your ideas as to what is actually possible and seeing some of the samples of what has been homebuilt might enable those of you here with lots of "on the set" experience to add to the designs that are helping innovate the entire field... a handful of creative operators have provided most of the innovations to date. i guess what im saying is that the brackets and widgets section of this site is similar to what these guys are building for themselves... worth taking a look at... (i think this was mentioned in the archives a couple of years ago....)
  24. just curious,,,, how many people here have heard of the steel socket blocks "blowing up"??? Ti is great for springs, bicycles and race cars,,,, but looking at Young's modulus might indicate that if you are "shoving" high psi bolt heads into a curved plate that steel might be a better choice....
×
×
  • Create New...