Re: [CAD_CAM_EDM_DRO] Re: Tree Mill Journeyman 300 retrofit

One of the details that remains is that the original setup used relays to
activate a air cylinder to shift the spindle from low to high speed. I need
to make a manual lever because I leery about shifting gears while running
and I don't want to set up the logic with a PLC. After I get these finishing
chores done then I'll reinstall the fiberglass shrouds and will post some
pictures probably within a week or so.
Dan

----- Original Message -----
From: "apaulsalerno" <apaulsalerno@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Tuesday, March 15, 2005 12:16 AM
Subject: [CAD_CAM_EDM_DRO] Re: Tree Mill Journeyman 300 retrofit


>
>
> Hey Dan How are you? When will we see pictures of the Tree?
>
> aka Halfnutz
>
>
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "Dan Mauch" <dmauch@s...>
> wrote:
>> I am nearly done with the finals details on the Tree mill retrofit.
> The last
>> big problem that I ran into was there was more than normal noise
> coming from
>> the two speed gear and pulley driven spindle drive. So I took it
> apart and
>> was surprised to see fiberglas insulation packed around the inside
> of the
>> casting. There is a lube system that pumps oil to the countershaft
> pinon
>> gear and the spindle backgear. Of course the fiberglass was
> saturated with
>> oil. So I figured that it was added as a sound dampening. I removed
> it.
>> While cleaning the spindle gear case I also noticed two things. 1.
> there was
>> groove in the lower casting that looked like it was machined 2.
> there were
>> metal chips at the tangent of the pinion and bull gear. When I
> removed the
>> bull gear and cleaned it I found some significant pitting of some
> of the
>> pressure side of the teeth caused apparently by water entering
> into the
>> upper casting. This pitting was only on about 1/3 of the teeth. I
> checked
>> and found that there were no replacement gears to be had. I also
> noticed
>> that the back side of each tooth was fairly smooth. So I cleaned up
> the gear
>> and decided to mount it upside down since the gear was nearly
> symetical
>> from top to bottom thus I would have a new and better condition
> teeth in
>> contact with the pinion that was in great shape.
>> I ascertained that the groove in the bottom of the casting was
> caused by
>> the machine not being properly reassembled at some point in its
> history. I
>> noticed that the upper bearing retaining lock nut wasn't all the
> way on the
>> shaft threads. While I had it diassembled I lapped the threads in
> so I
>> could bottom the nut. When I reassembled the unit and test ran it I
> found it
>> to be a lot quieter. In the high speed position where the bull gear
> is
>> disengaged the only noise was normal motor noise. At 6600 RPM it
> really
>> sounds like there is small turbine running. In low speed at about
> 1800 the
>> gear noise is still there but drastically reduced.
>> I only plan to use the machine about 10 hours a week so I think I
> will pass
>> on having a new gear made.
>> The only things left to do is to do some more cleaning and
> painting. I plan
>> retain the existing electrial enclosures and after removing all the
>> electronics weld in shelves for tool holders, cutters and other
> supplies. I
>> think my $750 Ebay milling machine was worth the work put into it
> and I
>> enjoyed and looked forward to getting all the "rode hard and put
> away wet
>> problems" repaired and working like a good used but still with
> plenty of
>> life left in it.
>>
>> Dan
>> Camtronics Inc
>> www.seanet.com/~dmauch
>
>
>
>
>
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