Man­u­fac­tur­ing

The visit to AMAPRO on Fri­day was a sig­ni­fic­ant suc­cess, I feel con­fid­ent enough about the pro­cess that I didn’t fol­low up my other tur­ret punch­ing options.

The com­pany is run by a man who strongly reminds me of someone I have worked for recently, and to a lesser degree an earlier boss. This sim­ul­tan­eously reas­sures me that he will do a good qual­ity job and also ter­ri­fies me because I am where he extracts his money.

The fact­ory floor tour was very impress­ive, an expans­ive space but very clean, no clut­ter. I was most inter­ested in their three Amada tur­ret punch machines, recent mod­els which seemed well main­tained, one was also fit­ted with an auto­mated feed allow­ing it to run unsu­per­vised overnight. They also had a num­ber of press brake machines, some auto­mated weld­ers and a range of other stand­ard tool­ing toys.

The com­pany has two engin­eers that do design work, includ­ing devel­op­ing their own AMAPRO products. I will prob­ably use them to assist in shift­ing from my sketches to a man­u­fac­tur­able product.

It was rather dif­fi­cult to dis­cuss price estim­ates, partly because it was very early in the design pro­cess, I also got the feel­ing that any final quote will vary greatly based on the quant­ity. They also offered that pri­cing for pre­lim­in­ary design and tool­ing work could be based on the even­tual final order, some­thing I am wary of because I intend to get at least one other quote for the final job.

The costs looks at being above $150 but haven’t taken into account the front face. For the ini­tial cal­cu­la­tions I am going to assume the front will also be metal, to avoid the plastic tool­ing costs, and work with a chassis price of $200. This is a sig­ni­fic­ant per­cent­age of my tar­get cost, higher than I was hop­ing for, but the cost struc­ture does have the advant­age of being fairly lin­ear based on quant­ity. I also think I will be able to offer the choice of cheaper metals with enamel and powder coat­ing or full stain­less as the tool­ing is identical. There are some other options which may be able to get the even­tual cost down but they come with con­sid­er­ably more risk.

The mech­an­ical por­tion of the feas­ib­il­ity stage is now com­plete. When I get around to pro­to­typ­ing I will prob­ably build the first pro­to­type myself in the gar­age, then draw up a formal design and do one or two rounds of small run man­u­fac­tured prototypes.

Thermal Ima­ging

I also spent some time invest­ig­at­ing thermal ima­ging sys­tems. I have decided on two devices to buy and invest­ig­ate fur­ther, both are very different.

The first is the Seek Thermal cam­era. This is a phone attach­ment which retails for $250 US, the latest after a series of Kick­star­ted products and an entry from FLIR. The com­pany is inter­est­ing, the founders have a solid his­tory in the industry, their prior com­pany was pur­chased by FLIR and they recently got a healthy check after FLIR tried to attack them through the courts. The cam­era seems amaz­ing, sig­ni­fic­antly bet­ter res­ol­u­tion than any­thing else on the mar­ket under $1000 and has a thermal range up to 350 ° C, many oth­ers cap out at around 100 ° C. The sub­stan­tial down­side is that Thermal makes their own sensor pack­age and don’t sell it as a com­pon­ent, I am going to have to talk them in to chan­ging this. It is also rather expensive.

The other is the Panasonic Grid-Eye 8×8, a com­pon­ent which provides a 64 pixel array of tem­per­at­ure. The main advant­age is that it is price com­pet­it­ive, $39 USD in single unit quant­it­ies, the eval­u­ation board is only $75 USD. The dis­ad­vant­ages are sub­stan­tial, the res­ol­u­tion is poor and the tem­per­at­ure range caps out at 100 ° C. How­ever while the pic­ture won’t be nearly as good to look at com­pared to the Seek Thermal I think the res­ol­u­tion will be enough for the func­tion­al­ity I envis­age and tar­get tem­per­at­ures tend to be under 100 ° C.

Worth men­tion­ing is the MLX90620, my third option. This was used by the IR-Blue pro­ject, one of the early Kick­star­ted infrared phone products. The sensor pro­duces a 16×4 pixel array with a tem­per­at­ure range up to 300 ° C. How­ever at $87 USD per unit it sits in an uncom­fort­able space between the two other products, bet­ter than the Grid-Eye but nowhere near as good as the Seek Thermal. I may revisit it if the other two don’t work out.

Dis­play

I was hop­ing to find one or two options for the dis­play this week but didn’t get around to it.

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