My Old Landy
Engineering Mayhem
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Well they are having another sale so I have ordered a second ams unit along with the hub. I also threw in a hardened extruder and a 0.6mm hotend for fun 
- Thread starter AlexBrown_1
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Not sure now. Lolas long as the overall length of the spindle is 68mm i am not sure it matters. If I was a print farm It might be easier to use 2 parts. As once the ballast/wright is added and held in place by the threaded blank with the slot in it, the big thread is very quick to use.
I think I could have coped with altering the outer thread and the width and length given enough time but the real.sticking point was the blanking piece thread. That said after I sat and thought about it all once I had expanded the models (all at the same time) the blanking piece should fit and the large thread should fit. As long as I could chop out the correct chunk from the middle of the spindle.
That was what was annoying me as once I resized in Bambu studio I could not edit in Fusion the same way Jake showed me on video.
ajlelectronics
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Not sure now. Lolas long as the overall length of the spindle is 68mm i am not sure it matters. If I was a print farm It might be easier to use 2 parts. As once the ballast/wright is added and held in place by the threaded blank with the slot in it, the big thread is very quick to use.
I think I could have coped with altering the outer thread and the width and length given enough time but the real.sticking point was the blanking piece thread. That said after I sat and thought about it all once I had expanded the models (all at the same time) the blanking piece should fit and the large thread should fit. As long as I could chop out the correct chunk from the middle of the spindle.
That was what was annoying me as once I resized in Bambu studio I could not edit in Fusion the same way Jake showed me on video.
Well just load my work into Fusion and save out as .stl and you are sorted!
I think I will get a working window in about 30 mins. Fingers crossed.
Now I have had time to see what you have created I can see I have not explained it very well.
the cylinder has a blank end.
Hopefully my extremely crude drawings will explain better?
I will however try to adjust your fusion file as I might gain knowledge that way.
ajlelectronics
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I must be missing something then? You need a spindle which you can fill with weight, so as long as you have access to the interior and pulls up on the spool, surely that does the job?
With the spinner tightened down on the spindle, you have exactly what you need, or so I thought. You can select that top blank in the Fusion file and move it down to become part of the spindle if that is how you prefer it.
With the spinner tightened down on the spindle, you have exactly what you need, or so I thought. You can select that top blank in the Fusion file and move it down to become part of the spindle if that is how you prefer it.
ajlelectronics
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If you blank off the spindle, how do you get the weight inside it? My design still puts the blanking cap on the end of the spindle, you just load the weight from the top, rather than the bottom. Or is it essential to lock the spindle on the spool before putting in the weight? The dimensions should be right at 68 x 68mm. I think it is just a different way of achieving the same end.
ajlelectronics
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Quick (untested fiddle) The blanking plug is 52x3 thread which may be tight as it hasn't been offset.
The weight is put in from the fixed end. (Which could be a spinner, as in your design)
That is effectively permanent.
The spool is then pushed through the spool and a spinner tightens it to the spool.
Having one end attached to the spindle means the distance with always be 68mm (or less) when the spindle is tightened up.
The width goes into fusion perfectly as 68mm but the length between the two points is showing as 105mm in fusion
As in the photo the ratio looks like a
dumpy little thing.
The photo below shows one of my attempts but the threads on the plug and the spinner don't fit that tube...
ajlelectronics
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The thread offsets haven't been done, but how is this so far? The spinner will close through the 68mm you want, down to 64mm ish.
How to offset threads for clearance..
How to offset threads for clearance..
Just getting wife's tea. Will get onto it ASAP.
Misterg
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Be very wary of the 'Measure' tool in Fusion - it gives you the 'as the crow flies' distance between two points, which may not be the ones that you think you've selected. It's safer to select a whole face for one of the references which then gives you the perpendicular distance from the face to a point.
Usually, you would get the option to show the distance in X, Y, Z coordinates, but it doesn't seem to do this for step files.
ajlelectronics
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You don't need to print the whole thing, just submerge the model under the print bed in the slicer and just print a section of thread.
ajlelectronics
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It was a diagonal measurement he was showing, although it was far too long anyway.
@ukracer To get an accurate measurement, hide the spinner so the rule is parallel to the spindle.
Yep....the screen shot was to show where I need to measure from. That's one reason for fixed spinner at one end.
But it's pretty easy to see if it's close as it's like a square.
It's actually critical it's not over 68mm because whilst you can twist the spinner to be tight that does not remove any extra sticking out. As its in the AMS it can't be too wide.
This is one of the problems that cardboard spool suppliers are finding.
The popularity of the AMS is forcing them to research ways of creating a false plastic spool that can be reused.
The adding of a spool creates a problem with side to side friction touching the next spool. But without the weight spool after around half a spool is used up the spool tends to jump out forwards (especially for those of us forced to fit them tilting down to be able to open the lid ) largely due to limited head room.
I think my long term solution (in the short term) is to swop the filament to a decent spool but use weights as well.
As Misterg says getting the correct place to measure is tricky. Well to me it is anyway.
Which daft for a program that is actually about creating parts to specific dimensions.
Misterg
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Not intended to detract from @ajlelectronics efforts, but if anyone wants it, here's a parametric version created from scratch in F360 (out of curiosity - it took less than half an hour).
I printed one out last night, and the thread clearances work OK (but are adjustable from the timeline, anyway). I used supports for the threads.
It should be possible to tweak the dimensions without adding any extra operations: change the dimensions in one of the sketches / timeline operations instead. If anyone wants me to talk them through it, drop me a PM.
I printed one out last night, and the thread clearances work OK (but are adjustable from the timeline, anyway). I used supports for the threads.
It should be possible to tweak the dimensions without adding any extra operations: change the dimensions in one of the sketches / timeline operations instead. If anyone wants me to talk them through it, drop me a PM.
