On Tue, 16 Feb 2016 21:28:47 -0500, you wrote:
>I have used O rings for belts they can work in a pinch
The problem I've had with them is that they expand at higher speeds
and fly off the drive pulleys. (or almost)
The original plastic belts are available through McMaster (or at
least, a substitute). However, I don't remember the exact size.
That, however, is a project for later, I have enough to do right
now...
Harvey
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>From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com]
>Sent: Tuesday, February 16, 2016 8:48 PM
>To: Homebrew_PCBs@yahoogroups.com
>Cc: Homebrew_PCBs@yahoogroups.com
>Subject: Re: [Homebrew_PCBs] Re: Drilling circuit boards on the cheap:
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>On Tue, 16 Feb 2016 19:52:19 -0500, you wrote:
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>>A friend of mine used to use something called a unimat to drill his boards.
>It was belt drive,but also converted into a lathe. I borrowed it when I did
>some boards a long time ago
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>It's very precise, a combination of lathe, drill press, and almost
>anything else. It's also quite expensive since it is a collector's
>item at this point.
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>Its weak point is also the strong point, versatility. However, every
>setup needs to be squared and trued. It has minimal capacity, but can
>do beautiful work when properly adjusted.
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>The belts have limited life and are somewhat annoying to find
>replacements for.
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>It can be a very high speed drill press, about 15K RPM IIRC.
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>Harvey
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>>From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com]
>>Sent: Tuesday, February 16, 2016 9:58 AM
>>To: Homebrew_PCBs@yahoogroups.com
>>Subject: [Homebrew_PCBs] Re: Drilling circuit boards on the cheap: [1
>Attachment]
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>>This is what I use for small boards. It only has about an inch and a half
>throat but is very stable. I think it was used by clock makers but there is
>no information available for it.
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