Square frame/main shaft video query???

[alfab3]

Hi all,

I am about to put the main frame of my 600N together…

I have placed all components on one frame and will join the other frame.

As suggested in the instructions, it is wise to ensure that the frame is square and that the main shaft slides freely between each of the three bearings.

I am going to put some bearing retainer between the bearing and the shroud.

Before I do this though, I am going to do a dummy run and build the frame to see how easily the main shaft will move within the squared frame. (don't want that retainer to set before I get it square.)

Has anyone seen a video of how easily this shaft should move up and down to indicate that it is square?…

Should the shaft drop easily through each bearing, or;
should it be a smooth motion when the shaft is raised and lowered with some resistance/friction.

Thanks for any assistance…

Regards
Alf

[aamwood]

Have u checked Finless video ? I don't have any problems squaring the frames.

[alfab3]

Sorry, I forgot to mention that it is a 600 nitro. The frame that Finless uses is for the electric (i think) and is different.

I have read that Mercuriell talks about it in his build thread, I will have a look at what he says.

Was hoping a video would exist...

Cheers
Alf...

[MikeWz]

http://www.helifreak.com/showthread.php?t=41514

There's a link for the nitro pro....which should follow suit for the standard as well

[alfab3]

Aha, The new Finless videos on the 600 nitro pro...awesome...thanks!

[Mercuriell]

I couldn't square mine up totally - - I don't know about dropping through but the main shaft should slide easily through the bearings - to do this, for me, one frame ended up about 2-3 mm out of sqaure - I think this is due to the machining for the bearing supports being a little too tight - I haven't had any probs though but certainly would aim for the shafts being in line rather than the frames 100% square.

[helical]

I couldn't square mine up totally - - I don't know about dropping through but the main shaft should slide easily through the bearings - to do this, for me, one frame ended up about 2-3 mm out of sqaure - I think this is due to the machining for the bearing supports being a little too tight - I haven't had any probs though but certainly would aim for the shafts being in line rather than the frames 100% square.

I had the exact same experience.

[Finless]

Odd... after helping build at least 7 600E's and this N I never had a problem getting the main shaft to drop right in and slide down the bearings under gravity.

I would be concerned if you have to force the main shaft myself as bearing life might be a problem as well as vibration issues.

I would find out why you cant get a smooth fit and correct it myself.... Maybe I am a perfectionist or something but I think this fit is somewhat important.

Bob

[Mercuriell]

Odd... after helping build at least 7 600E's and this N I never had a problem getting the main shaft to drop right in and slide down the bearings under gravity.

I would be concerned if you have to force the main shaft myself as bearing life might be a problem as well as vibration issues.

I would find out why you cant get a smooth fit and correct it myself.... Maybe I am a perfectionist or something but I think this fit is somewhat important.

Bob

Haven't had the problem either on any of the E frames (CF/HFX/Ali) but definitely somwething not right on the Nitro CF - I think it is the machining of the hole for the central lug on the bearing mount - too keen to get the bird in the air to fiddle around too much this time but will have a close l;ook at htis when I get an alloy fan and change the OS to a YS engine :) - Agree about the crucial improtance of line up of the shaft bearings though.

[Finless]

Haven't had the problem either on any of the E frames (CF/HFX/Ali) but definitely somwething not right on the Nitro CF


My nitro CF was fine too... Trust me the simple matter of how you wrench the frame together CAN make a difference here. If you have a problem loosen everything and check the main shaft in the bearings. Good? If not yes the frame is not right. If yes then leave the main shaft there and tighten screws from the bearing blocks out. Check the main shaft ride as you go along.

Bob

[tchavei]

2 or 3 mm?!?!?!

I was all over the forums and got myself metal bearing blocks because my frames wouldn't align better than within 0.19mm... jeez I think I'm getting old and paranoid...

Tony

[helical]

My mainshaft slides in and out very smoothly....but the frames still are out of square.

[stevehonn]

When I assembled mine I inserted the mainshaft into the bearings before tightening the fixing screws finally, I didn't bother placing the bottoms of the frames on a flat surface. The main shaft slides easily in and out now, no alignment problems.