I have just started on a project where I will need to produce a flexible (probably silicone) housing around a flexi-rigid PCB, a lithium battery, LCD and a button.
The product is highly cosmetic and worn next to the skin. The housing needs to hermetically seal the electronics.
I am looking...
I just looked at BS8888 again and the only relevant reference I can find is in section 5.3 regarding Combined Drawings.
It states that:
"A combined drawing should display an assembly, item list and constituent details, drawn seperately but all on the same drawing."
I guess this covers...
I have a copy of BS8888 and it mentions assembly drawings but does not define when an assembly drawing should be used. I had always assumed that anything comprising more than one constituent part would be an assembly. I have only just heard the term "inseperable assembly" and don't know if this...
Can anyone tell me, is there a BS standard for the layout of sheetmetal assemblies?
I have always treated a welded assembly, or a sheetmetal + studs/rivet nuts assembly, as the same as any other type of assembly. I would show an exploded view, projections and a BOM with balloons.
I recently...
I would love to go with Mike Halloran's idea, but I can't extend the rack and the torque will vary a lot depending on different installations, so a clutch won't work (I don't think).
gearcutter:
I'm liking the sprung pivoting rack idea, will look into this more. I guess there may still be a...
MikeHalloran:
I can't extend the fixed rack - that's why I have this problem. Thanks anyway.
SincoTC:
Thanks again. It does sound like a similar problem though I think I have much higher forces to deal with. I don't really have room (I don't think) for a pinch roller or a large drive wheel...
SincoTC:
Thanks again, sounds like a good plan. I'll give a prototype a go(if I get the chance, depends on client reaction) and see how it goes - will post results here. Might be a few weeks though.
djm883:
Sorry, won't work as I can't stop the pinion rotating.
hydtools:
I have the same...
SincoTC:
There is an intermediate gear between the carriage drive and the pinion, so the pinion moves faster than the carriage. So the pinion will indeed pull the carriage - this is the intention.
So, you reckon that if I chamfer the rack and drop the first tooth height, it would mesh OK? This...
Firstly, many many thanks for these great ideas. This forum has been much more useful than I had thought it would be!
So to reply to you all:
To SincoTC:
For my application, I think the swing-arm mounted pinion may have some mileage but I am worried that if the pinion hits the rack at just the...
No, don't think that would work. I'd better explain the prolem in more detail.
The pinion is on a carriage. The carriage drives itself along with a motor which is linked to our pinion. So when the carriage moves, the pinion is turning.
the carriage drives itself up to the rack. The turning...
Hi
I have a pinion which is being carried towards a rack. The pinion is turning. I want the pinion to engage smoothly with the rack without stoping the pinion.
Have thought about mounting the pinion on a shaft split with some sort of flexible coupling.
Also what if I tapered off the ends of...