## Captain's Blog 12 15 2016 How to Mask a Tube for a Barber Pole Paint Job

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today's captain's blog was made possible

by a grant from Brad Wilmot who claims

full responsibility for my actions

throughout the course of today

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you

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had to figure a thing out so I figured

I'd shoot blog of des to share it with

somebody else because I can't be the

only guy who ever has to do this and in

a spirit of you can learn just about

anything on YouTube I figured I'd share

this one because this was a bit of a job

oh my god how did I do that

if you're wondering about how delicate

my touch can be note that I just cut

through one layer of tape without

cutting through the one below because

I'm trying to avoid scratching the

painted surface beneath there's no way

to not but you can at least mitigate

that minimize it pick an M or any

emerging I'll go with a matte finish

because this job stakes

there

all right so here's your puzzle you have

a piece of tape that is that wide there

we go okay you have a pipe that is that

diameter and you want to get 50%

coverage and about a 45 degree angle

because it has to match the rest of the

machine

well you can't can't be done and the

reason is Matt it's the reason is Matt

that's because to get a perfect 40 the

angle that you have to lay it on to get

a 50% coverage is dependent on the width

of your tape to the diameter pipe so you

have to compromise something the most

important thing at a distance for just

basic visual is about a 50% coverage so

here's how you do that here's how you

figure out what your angle is without

having to do any insane math we have to

do old-school methods so you know the

the width of the tape is arbitrary the

diameter of the pipe is arbitrary our

entire goal is about 50% coverage this

could be done more exacting ly but it

has to be done by somebody who has way

more patience than I do so it starts by

setting a band of tape around the top

the more exact you get this to the top

of the pipe the better and this is a

processing and someone cut your pipe

square this is square enough about that

80/20 rule this is where we get Internet

all right so now you have a band of

taper on your pipe and this gives you

one tape width of length on the pipe net

put a mark on the pipe on the end can be

anywhere doesn't matter but just put a

mark on the pipe and set the pipe like

that with the mark away from you and

eyeball that person now I have ISO

calibrated eyeballs your mileage may

vary now set that line and I've got this

set for the thickness of the pipe so I

had it set for the thickness of the pipe

to like kicked it so let's set this

video thickness of the pipe again

just just about there actually I can

make this even easier watch we got the

one inch line Center that on your line

and make sure that your measurements

across even

and when you hit the point where the

measurements all lined up like thus you

can follow that line straight across and

now you've got diameter markings they

are diametrically opposed that's what

that means by the way if you've ever

wondered what the term diametrically

opposed means that's what it means it's

across the diameter so now we take this

tool we put up here like this well to

make it easier chase your line over the

edge just by I go around chase it over

the edge make sure to draw on the tape

not the thing and then turn bring your

line down remember these don't have to

be absolutely dead nuts on this is hand

layout okay hey and so now we have one

with the tape with two lines 180 off

halfway between them and this is where I

just lay it down and I have them

opposite put a mark halfway down your

tape right there

so line line dot the lines are 180 off

and the dot is at 90 degrees halfway

between them then you take a piece of

tape like that you want it a little bit

long get your shaft in a comfortable

position and you want to leave this to

hang out because you're going to have to

wrap around and you want to have enough

end to hang off the end but just connect

the top of this line to the top edge of

your tape to this dot that may take a

couple times to

but it's really easy to mess with that

angle at this phase there and we're not

perfect but we're really really close

and you'll notice when I come around my

tape comes out just about it's because

my angle isn't dead no time but my tape

comes out to just about where my other

line is so if I continued this around

here now this is where it gets tricky

and this is your big source of

variability the tape is paper and it

will stretch so you need to put just

enough tension that it lays flat and you

you let it you let the tube guide the

angle because if you lean a little bit

you'll get a wrinkle in it so you want

to have no wrinkles so you pull the tape

out like this far and then you just

rotate the tube and you do this slow and

look we end up now we're like an eighth

down here and we're like an eighth down

here so I can live with that or our

error that were shifted let's say we're

shifted down to band eighth at that line

okay we're shifted down tube innate that

this line so it's good it's really then

you just follow it on down slowly and

carefully this is one of those things

that it would be a lot easier if I had a

friend to hold my shaft but I can I can

do this on my own I have a lot of

training in this but keeping the tape

long makes it easier length is always a

benefit when working with your shaft and

especially remembering that it is

important to wrap your shaft for safety

and by putting these markings on here

the the caution yellow and black

markings I am in fact wrapping my shaft

for safety we're going to be painting it

so I may be putting a latex coating on

but today we're actually doing this with

probably an acrylic enamel because I'll

be using a spray paint just rattle

canning this because this is a non

supercritical thing which is why I

haven't bonded like sand often trusty

bits I don't really mind a little bit of

crusty bits on my shaft especially at

the base you'll have that all the way

down to the base okay and then turn that

off follow it all the way around to the

last rap and press and take this way

back up to the top and press

and then you got a trim it handy-dandy

razor blade of science it's easier to

trim from the acute side

there is a way to cheat this that I

discovered but I didn't use because I

didn't I didn't think it'd be good

enough but I think having done this a

few times I think it worked with the

trim off piece you should use this on

the next tube to start and establish

your angle and it will exactly match

that but you've got to be perfect in

laying it in and that only works if your

tube is cut really really really

perfectly square but you could use this

as a cheater piece I'm not you can see

that I've got three of them sitting over

here ah but I figured it out with the

thing I'm not saying the Tudor piece

idea is bad I just didn't have the

finesse to be able to pull that off so I

did it via layout so that is how you

mask a tube for and then you just come

back and trim this off which is where we

began our video and I take you now full

circle

as I attempt to not carve into my ankle

now if I did I'd do it very nice 50%

angle now this isn't a 45-degree angle

the reason her yeah this isn't a

45-degree angle and a reason this isn't

a 45-degree angle is math with the right

thickness of tape you could do this at a

45 degree angle but you'd have to have

the diameter of your tube match the

width of your tape and in this

application the thing the initial

measurement is for this was the diameter

of the tube that was the first critical

measurement and that measurement was

determined by the capacitor string we

had to put inside that determined not

only the length of the tube from the

number of capacitors but the diameter of

the tube by the size of the capacitors

so that's how we got that first number

so now we know how big our tube is

because this tube is designed to be a

capacitor housing that's that's its

mission in life and while I am very big

on making these pretty like this as a

finished demonstration it's supposed to

be nice and pretty

at the end of the day form follows

function engineering rules so that

determined the diameter and length of

the pipe I got em both okay and that's

the oh my god I've done so there are our

and now I'm going to go paint in black

and now you know how to mask a tube for

50% coverage you're thinking like

stripes or pure a hack on the internet I

just want to copy my work are you Jeff

also bonus points for the first time I

laid it out that by the way was a

45-degree angle I laid it up using the B

angle on the thing I put it in there so

that that would get painted black and

you'll never see it

ha let's go K thank good Oh talked over

see you got done any other players that

was cool hey guys welcome to today's

captures barges 13 18 hours I know it's

the second segment of the blog but just

suck it hey constantly we learned about

we learned about geometry geometry

geometry

but flavor candy canes are these

these are the Batman wishes he had put

out for hard work

actually by Rico I went to lay down more

cardboard you know it's fine for the

caps I'm spying from Cass Oh your paint

in the tubes when I went to do it oh

yeah it was back in the early yellow

face hate yellow

god I hate yellow like I do this and

yellow takes like two days Black's done

in a couple hours

alright now we wait time is thirteen

twenty after lunch maybe

15:59 hours now we do the next area

cool now we wait today's captain's blog

was made possible by a grant from Brad

Wilmot who claims full responsibility

for my actions throughout the course of

today

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