Homebrew PCBs

Rob,

Since the recent posts on gears, I have been nosing around ebay looking 
for metal gears.

I found two sellers that have gears that fit a wide variety of shaft 
sizes, and have a variety of tooth counts:

1- speed_mart http://stores.ebay.com/speed-mart?_trksid=p2047675.l2563

2- fivefive.co.ltd 
http://stores.ebay.com/fivefive-co-ltd?_trksid=p2047675.l2563

There are other sellers, but they don't seem to have a wide variety of 
gears, and, for the most part, duplicate the ones carried by these two 
sources. I found them by searching for metal gears. IF you know your 
shaft size(s), you can search for metal gears xxmm. That will narrow the 
results to just those that you could use.

I am investigating a set of gears that look to be a fit for the Harbor 
Freight laminator.  That laminator has flatted shafts. These gears are 
for round shafts, but have collars with set screws. I will report back 
when I have determined whether these gears look good for that application.

Harvey



On 12/20/2016 12:08 PM, Rob roomberg@... [Homebrew_PCBs] wrote:
>
> Sure.......
> hack an appliance to run hotter than its intended design 
> parameters..... then walk away.
> I melted one plastic gear at 390 degrees in less than 10 minutes.
> What would have happened if I left that 390 degree heat continue its 
> dissipation into more parts?
>
>
> It doesn't matter if it shuts off in 30 minutes if your fire starts in 
> 15 minutes.
> You ARE playing with heaters in a plastic case relying on electronics 
> you hacked.
> When you burn down your house .... free to explain to your insurance 
> company how this is their bill to pay after voiding the laminator 
> warranty by opening it and adding features to make it run 
> hotter....hot enough to melt plastic... deform structures..that holds 
> AC electricity in heaters.
>
> DON't walk away.
>
> I went a totally different route. Throw away all the plastic parts.
> http://www.learnmorsecode.com/laminator/al9.html
>
> Remove the metal rollers and heaters completely from the plastic shell 
> and mount them
> in metal brackets and a metal box.
>
> Nothing heavy metal....just construction steel studs thin gauge metal.
> Pretty much end up with a metal toaster with rollers.
> I don't have it running yet because I lack metal gears.
> I'll get to metal gears some day.
>
>
>
> On 12/20/2016 12:59 PM, mosaicmerc@... [Homebrew_PCBs] wrote:
>>
>> Hi all:
>>
>> I believe an auto shutdown of the laminator's (Apache/Trulam) heater 
>> is of safety value to the user. In such a case if a laminator is left 
>> unattended (no mode switching for the mod.) It will auto cool (power 
>> off) the heaters after a certain time, leaving the temperature set 
>> point unchanged.
>>
>>
>> I am thinking about 30 minutes of operation should be a reasonable 
>> time. Would any other members have thoughts on this?
>>
>>
>
>