Homebrew PCBs

Ken,

See my comments inline below:

Roger

 

From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com] On Behalf Of sailingto
Sent: Friday, February 12, 2010 1:12 PM
To: Homebrew_PCBs@yahoogroups.com
Subject: [Homebrew_PCBs] Re: GBC laminator

 

  

Thanks Roger - looks like I do have a GBC H-65 laminator after all. I had not looked for a model number other than on front panel.
While looking at your schematic I thinks - that sure looks like my wiring! it is.

I do have a question for you - couple actually. 1st question - what program did you draw that up in? Sure looks good. Could you mail
the full size file direct to me? sailingtoo@... <mailto:sailingtoo%40gmail.com> 

>>> I used AutoTRAX DEX for the schematic, and used screen capture to get the .jpg. I'll email that to your personal address. <<<

2nd - where/how did you get the temperature ratings of the thermal switches? By testing? OR did your switches have the value on
them? My switches have no value that I can tell.

>>> Those values are really meaningless; that was a first shot at figuring out what I had, and used an IR temp probe to 'see' into
the top vents to get those values which represent an averaging of the readings. Since then I found that I could 'see' the rollers
through the path slots with the probe, and noted that the highest temp I get on high heat is 200F, +/- a couple. I haven't done an
exhaustive test regimen (yet), as I have been trying to produce something at the same time. (I know. not smart!) <<<

I removed the LOW temperature switch and put a relay that is controlled by a ATmega168 chip for a rough form of temperature control.
A new sensor was clamped in place of the thermal switch.

>>> I am looking for the most simple variable control circuit to do that, haven't found anything DIY suitable yet; I haven't gotten
into programmable stuff yet. Can you elaborate some on the ATmega bit?<<<

Thanks for the work you did in getting the schematic together.

Ken H.

> When approved, it should show up here:
> 
> http://groups.yahoo.com/group/Homebrew_PCBs/photos/album/1587588139/pic/list
> 
> Regards,
> 
> Roger_



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