Search results for query: *

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...

hydtools, what do you mean by a friction drive? A drive tyre would be just that wouldn't it? Or were you meaning something else? ta marv

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...

Unfortuately not. The pinion cannot be linked to the rack once it has disengaged; it needs to be disengaged completely. Thanks for the try!

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...