Borbin the 🐱

Here is another¹ example of modern engineering excellence. Looks great from the outside but not so much from the inside.
(¹ Samsung Dishwasher: Looks nice, but has an astonishing accuracy to start failing past the end of the warranty. A great marvel of Korean engineering.)

See for yourself:

Once the stick is powered up, you have to wait several minutes until you get a response. Instantly pressing a button on the control when the start screen is coming up makes the device unresponsive. Very annoying.
Bonus: You get nice different themes during start.

Or: Switch sub titles on/off. Great solution presented here too. Once you decide to change sub titles in the middle of the presentation, you have to go back to the main menu and start all over.

After a few weeks of use, I discovered that the batteries were empty. Replaced then and didn't gave this a thought, until a few weeks later the batteries were empty again. It was not obvious that the batteries were empty since the device does not respond instantly anyway but a quick check with the multi meter confirmed it.
When did you replaced the last time the batteries of your remote?

I contacted Roku support about all this along with the confirmation that I did all the steps the FAQ suggests, only to get an answer one week later to go and check the FAQ. Report ticket was automatically closed. How convenient.

Checked the remote for power consumption:

Almost 12mA current is drawn constantly. No key is pressed!
I'm surprised the batteries made it that long.

Compared this to my WD Media Player remote:

and 0mA, the way a remote should work.

Checked the Roku remote control inside, but decided not to waste any more time.

And here is my solution:

Hi,

You received this email because you requested to close your account, we have removed your information from our system.

Thanks for using Roku!

Roku

A practical exercise with PowerShell.
6 gears with 2 gears of a set of 10 available gears make up the ratio for cutting metric and imperial threads using a G0602 metal lathe.
The gear labels suggest only 24 metric and 29 imperial combinations, but 526 unique combinations from 0,25mm/101,6tpi up to 3,47tpi/7,3169mm are possible.

Gears

The spindle gear at the top all the way down to the leadscrew gear at the bottom:

The leadscrew gear

The leadscrew gear allows 9 different ratios:

Imperial gear label

Metric gear label

The script

This PowerShell script creates all gear combinations and outputs the result in a CSV and TXT file. The CSV contains also all duplicate combinations possible with the different gear ratios.

First all gears combinations are created from a one-dimensional array into a two-dimensional array. The ratios of all gear combinations are connected to the 9 leadscrew ratios. The a and b gear are swapped in the inner loop.
The result is stored in one of PowerShells best inventions: the PSCustomObject. The result of the calculation is a list of PSCustomObjects which can be send directly to a CSV or formatted to a TXT file.

The lead screw has 12 threads per Inch. The conversion from Inch to metric is done by connecting the 'b' gear to the 120 gear instead of the 127 gear.
2 * 127 = 254 -> 1 Inch = 25.4 mm
With the leadscrew gears (III,ABC), the main ratio is a/b IIIABC. For metric it is 4/3 ratio and 18 / ratio for imperial.
For each of the values, the matching metric/imperial value is added in brackets. The conversion is rather simple: Metric = 25.4mmtpi / Imperial and *Imperial = 25.4tpimm / Metric**

# available gears
$z = @(27, 32, 36, 40, 44, 45, 48, 52, 56, 60)

$ab = $null

# create all gear combinations
for ([int]$u = 0; $u -lt $z.length; $u++)
{
    for ([int]$v = $u+1; $v -lt $z.length; $v++)
    {
        $ab += ,($z[$u], $z[$v])  
    }
}

# leadscrew gear ratio
$ABC = @((1,'A'),(2,'B'),(0.5,'C'))
$III = @((1,'I'),((5/6),'II'),((7/6),'III'))

$t = 
foreach ($_ab in $ab)
{
    foreach ($_A in $ABC)
    {
        foreach ($_I in $III)
        {
            # and swap gear
            for ([int]$ab_index = 0; $ab_index -lt 2; $ab_index++)
            {
                $a = $_ab[$ab_index]
                $b = $_ab[1-$ab_index]
                $r = $_I[0] * $_A[0] * $a / $b
                $mm = $r * 4 / 3
                $tpi = 18 / $r

                [PSCustomObject]@{
                    'a' = $a
                    'b' = $b
                    'III' = $_I[1]
                    'ABC' = $_A[1]
                    'mm' = $mm
                    'tpi' = $tpi
                    }
            }
        }
    }
}

# export to CSV
$t | Export-Csv -NoTypeInformation -Delimiter ";" -Encoding UTF8 -Path g0602.csv

# sort for threadsize and write to a text file
$list = $t | sort -Property mm -Unique | % { ("    {0}-{1} {2,-3} {3} = {4:0.####}mm ({5:0.##}tpi)  {6:0.##}tpi ({7:0.####}mm)  " -f  $_.a, $_.b, $_.III, $_.ABC, $_.mm, (25.4 / $_.mm), $_.tpi, (25.4 / $_.tpi)) }
$list | Out-File g0602.txt
$list

"{0} Einträge" -f $list.Count

Most combinations are fractional. Here is a filtered metric list (24 entries):

$list_mm = $t | sort -Property mm -Unique | ? { (20*$_.mm - [int](20*$_.mm)) -eq 0
    } | % { ("    {0}-{1} {2,-3} {3} = {4:0.####}mm ({5:0.##}tpi)  " -f  $_.a, $_.b, $_.III, $_.ABC, $_.mm, (25.4 / $_.mm), $_.tpi, (25.4 / $_.tpi)) 
    }


27-60 II  C = 0,25mm (101,6tpi)  
27-60 I   C = 0,3mm (84,67tpi)  
27-40 I   C = 0,45mm (56,44tpi)  
36-40 II  C = 0,5mm (50,8tpi)  
27-60 I   A = 0,6mm (42,33tpi)  
45-40 I   C = 0,75mm (33,87tpi)  
27-40 I   A = 0,9mm (28,22tpi)  
27-36 I   A = 1mm (25,4tpi)  
27-40 III A = 1,05mm (24,19tpi)  
27-60 I   B = 1,2mm (21,17tpi)  
36-32 II  A = 1,25mm (20,32tpi)  
27-48 I   B = 1,5mm (16,93tpi)  
36-32 III A = 1,75mm (14,51tpi)  
27-40 I   B = 1,8mm (14,11tpi)  
36-48 I   B = 2mm (12,7tpi)  
27-40 III B = 2,1mm (12,1tpi)  
27-32 I   B = 2,25mm (11,29tpi)  
36-40 I   B = 2,4mm (10,58tpi)  
45-56 III B = 2,5mm (10,16tpi)  
36-32 I   B = 3mm (8,47tpi)  
36-32 III B = 3,5mm (7,26tpi)  
45-32 I   B = 3,75mm (6,77tpi)  
48-32 I   B = 4mm (6,35tpi)  
60-32 I   B = 5mm (5,08tpi)  

Filtered imperial list (56 entries):

$list_tpi = $t | sort -Property mm -Unique | ? { (2*$_.tpi - [int](2*$_.tpi)) -eq 0
    } | % { ("    {0}-{1} {2,-3} {3} = {6:0.##}tpi ({7:0.####}mm)  " -f  $_.a, $_.b, $_.III, $_.ABC, $_.mm, (25.4 / $_.mm), $_.tpi, (25.4 / $_.tpi)) 
    }


27-60 II  C = 96tpi (0,2646mm)  
32-60 II  C = 81tpi (0,3136mm)  
27-60 I   C = 80tpi (0,3175mm)  
36-60 II  C = 72tpi (0,3528mm)  
32-60 I   C = 67,5tpi (0,3763mm)  
27-40 II  C = 64tpi (0,3969mm)  
27-56 III C = 64tpi (0,3969mm)  
32-56 I   C = 63tpi (0,4032mm)  
36-60 I   C = 60tpi (0,4233mm)  
32-52 I   C = 58,5tpi (0,4342mm)  
36-56 I   C = 56tpi (0,4536mm)  
36-45 II  C = 54tpi (0,4704mm)  
32-56 III C = 54tpi (0,4704mm)  
36-52 I   C = 52tpi (0,4885mm)  
32-44 I   C = 49,5tpi (0,5131mm)  
36-40 II  C = 48tpi (0,5292mm)  
32-40 I   C = 45tpi (0,5644mm)  
36-44 I   C = 44tpi (0,5773mm)  
48-56 I   C = 42tpi (0,6048mm)  
48-45 II  C = 40,5tpi (0,6272mm)  
32-60 II  A = 40,5tpi (0,6272mm)  
27-60 I   A = 40tpi (0,635mm)  
48-52 I   C = 39tpi (0,6513mm)  
48-56 III C = 36tpi (0,7056mm)  
48-44 I   C = 33tpi (0,7697mm)  
45-40 I   C = 32tpi (0,7938mm)  
27-56 III A = 32tpi (0,7938mm)  
32-56 I   A = 31,5tpi (0,8063mm)  
48-40 I   C = 30tpi (0,8467mm)  
36-56 I   A = 28tpi (0,9071mm)  
60-45 I   C = 27tpi (0,9407mm)  
32-56 III A = 27tpi (0,9407mm)  
36-52 I   A = 26tpi (0,9769mm)  
27-36 I   A = 24tpi (1,0583mm)  
32-40 I   A = 22,5tpi (1,1289mm)  
36-44 I   A = 22tpi (1,1545mm)  
48-56 I   A = 21tpi (1,2095mm)  
27-60 I   B = 20tpi (1,27mm)  
48-52 I   A = 19,5tpi (1,3026mm)  
27-45 II  B = 18tpi (1,4111mm)  
48-44 I   A = 16,5tpi (1,5394mm)  
27-48 I   B = 16tpi (1,5875mm)  
27-56 III B = 16tpi (1,5875mm)  
36-60 I   B = 15tpi (1,6933mm)  
36-56 I   B = 14tpi (1,8143mm)  
48-36 I   A = 13,5tpi (1,8815mm)  
32-56 III B = 13,5tpi (1,8815mm)  
36-52 I   B = 13tpi (1,9538mm)  
36-48 I   B = 12tpi (2,1167mm)  
36-44 I   B = 11tpi (2,3091mm)  
48-56 I   B = 10,5tpi (2,419mm)  
36-40 I   B = 10tpi (2,54mm)  
48-56 III B = 9tpi (2,8222mm)  
36-32 I   B = 8tpi (3,175mm)  
48-40 I   B = 7,5tpi (3,3867mm)  
48-32 I   B = 6tpi (4,2333mm)  

All 526 entries as a text file sorted by size.
The metric column is the size with the 'b' gear connected to the 120.
The imperial column is the size with the 'b' gear connected to the 127.

'a'-'b'   leadscrew gear  =  metric column   imperial column 

27-60 II  C = 0,25mm (101,6tpi)  96tpi (0,2646mm)  
27-56 II  C = 0,2679mm (94,83tpi)  89,6tpi (0,2835mm)  
27-52 II  C = 0,2885mm (88,05tpi)  83,2tpi (0,3053mm)  
32-60 II  C = 0,2963mm (85,73tpi)  81tpi (0,3136mm)  
27-60 I   C = 0,3mm (84,67tpi)  80tpi (0,3175mm)  
27-48 II  C = 0,3125mm (81,28tpi)  76,8tpi (0,3307mm)  
 :
 :
60-27 II  B = 4,9383mm (5,14tpi)  4,86tpi (5,2263mm)  
60-32 I   B = 5mm (5,08tpi)  4,8tpi (5,2917mm)  
52-32 III B = 5,0556mm (5,02tpi)  4,75tpi (5,3505mm)  
44-27 III B = 5,07mm (5,01tpi)  4,73tpi (5,3657mm)  
52-27 I   B = 5,1358mm (4,95tpi)  4,67tpi (5,4354mm)  
45-27 III B = 5,1852mm (4,9tpi)  4,63tpi (5,4877mm)  
56-32 III B = 5,4444mm (4,67tpi)  4,41tpi (5,762mm)  
56-27 I   B = 5,5309mm (4,59tpi)  4,34tpi (5,8535mm)  
60-32 III B = 5,8333mm (4,35tpi)  4,11tpi (6,1736mm)  
60-27 I   B = 5,9259mm (4,29tpi)  4,05tpi (6,2716mm)  
52-27 III B = 5,9918mm (4,24tpi)  4,01tpi (6,3413mm)  
56-27 III B = 6,4527mm (3,94tpi)  3,72tpi (6,8291mm)  
60-27 III B = 6,9136mm (3,67tpi)  3,47tpi (7,3169mm)