Help the bike area with the big cnc :)

#1

Hi folks,

Sam kindly donated a board we can use to fashion a tool pegboard for the bike area. If a CNC-certified member could help us drill the holes into it, that would be very helpful and very much appreciated. :slight_smile:

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#2

What are the requirements? (Hole size, depth, dims between centres, size of board, margins etc.). Using a CNC drill bit will be best. I have one for 2.5mm holes (for pegboards). Is that any good?

I can set up etc., but if loadsa holes and it’s going to take loadsa time, then you will have to monitor it (cannot be left unsupervised).

I’ll be in Monday or Tuesday - would that work for you? If 2.5mm no good, then suggest order suitable size drill bit from APT - but that will take a few days to arrive. Maybe @cnctechs or a member might have their own drill bit that is suitable that you might borrow (?)

#3

Thanks Dan. Presumably the drill bits are different from ordinary jobbers?

I’ll work out how many holes it is, but it’ll be quite a few: the board will be min. 450mm x 350mm.

#4

Yes. It’s possible to make holes with ordinary endmills, which are designed for cutting sideways rather than straight down - either spiral down or make little pecks, or just plunge and don’t mind damaging the bit. If go for one of the first two options, it will take a lot longer. It could turn a 6 hour job into 14 hours or more. Ordinary drill bits aren’t the same either - they aren’t designed to run at high speeds as on CNC - and if run at slower speeds, again it would take a really really long time (if using those was allowed). Even with a proper CNC drill bit, estimate about 2 seconds per hole, but depending on depth, spacing etc. That might not sound much, but e.g. 150 rows and 100 columns adds up - 15,000 holes, which would be over 8 hours.

So better to spend £3 or so + delivery on a proper CNC drill bit if you want something other than 2.5mm diameter holes which I already have a CNC drill bit for.

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#5

If you happen to go for the skadis system, this will auto generate the file. Slot width needs a 5mm bit. You then just need stand offs so there is clearance behind the board and the start making clips / hooks. There is a T-nut mod somewhere a well for mounting.

https://www.printables.com/model/206256-parametric-skadis-board-generator

a Selection of pre-made tool hangers and peg board bits here. you will just need to adjust for the board thickness for any through parts.

https://www.printables.com/model/37835-parametric-ikea-skadis-pegboard-accessories
https://www.printables.com/search/models?q=skadis&ctx=models

#6

Rather than a pegboard, I’d think French cleats might perhaps be a better option for tools for the bike area (?).

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#7

Pegboards are tried and true for bike workshops. Heritage, if you will.

We may build in a couple of French cleats, but for the majority we’ll use pegboard and tool outlines to keep things streamlined and minimal.

#8

Good you are clear about what will work best. Let me know specifics for the design of the pegboard and we can plan out getting that done.

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#9

@hernehillier - based on specs you gave (¼” diameter holes, 6mm depth, 1” between centres on board 1159x704mm), that’s 1215 holes. Toolpath for that calculates at 52 mins if using a ¼” CNC drill bit (plus time to set up, clean up etc).

@CNCtechs - do we have anything suitable for drilling ¼” holes? Any suggestions?

#10

There are hole drilling tools on our bit holder second row. They are black coated and have a sharp, triangle end. Can’t tell from top of my head if they’re 1/4”.

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#11

Also: having looked at the pattern generator it seems they are not strictly holes but small channels, no? If I seen that correctly you can also use an end mill that plunges in like you’d do with any other cut.

#12

??

What’s wanted are ¼” holes through the 6mm ply with 1” between centres. No channels, just holes.

#13

Found them. They are metric - 5mm, 7mm and 8mm. ¼”. = 6.35mm. @hernehillier - does it need to be ¼” exactly or is one of those close enough?

#14

If you see Sam’s links you see one of them is a pattern generator (parametric fusion file) for the peg boards. If that is the one used for what @hernehillier has got / wants these are not just holes.

#15

Thanks - yes, but that’s not what they are after. Their requirements are ¼” holes with 1” between centres, not slots or channels like that.

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