Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: To Unclestu about the ferro fluid tweak posted by fastcat on February 22, 2015 at 15:23:14:
might take a while for photos. if you're patient I will eventually post.
I only soak the COIL assemblies. Since the correction motors move and can move a lot allowing too much ferro fluid to the point where it bridges the gap between the coils and the magnets or pole piece greatly increases the risk of splashing the fluid onto the optics. BIG NO NO!!! It is impossible to clean the mineral oil off(don't ask, but I've tried)
IF you place too much ferro fluid and you form a bridge, a piece of kleenex can absorb excess. I use a #5 stainless forceps to control the tissue, although you can fold it into into a triangle and apply.
Before placing ferro fluid, always analyze the motor assemblies. All laser assemblies have some kind of shield, usually plastic clip on.Remove to see the coil assemblies.Remember the lens has to move in two planes, so you may find four or even six coils. Each has to be loaded with about approximately equal amounts of ferro fluid (I've never been really critical because my mechanical dexterity is not so great these days.
If the laser motor coils are not overflowing but don't track well, I simply add more till I can see the ferro fluid build up in the coils themselves. The static magnetic fields will tend to hold the ferro fluid in place. Be careful as the magnets will draw the fluid straight to the pole pieces and magnets themselves. If that occurs I wipe the magnets and pole pieces clean to avoid bits flying off.
I used to use a diabetic insulin needle to apply the ferro fluid. Thin and it doesn't need much, but I do find it difficult to control the syringe itself. I use a toothpick these days and I actually have better control leaving a tiny droplet of ferro fluid on the very tip. As you approach the coils you can literally see the magnetic field "pull" the ferro fluid into the coils (power should NOT be on). HINT: move very slowly and carefully observe the tip and the destination...
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Follow Ups
- RE: To Unclestu about the ferro fluid tweak - unclestu 16:08:24 02/22/15 (2)
- Some photos - unclestu 12:18:53 02/25/15 (1)
- RE: Some photos - fantja 07:48:00 03/02/15 (0)