??? thanks John .
??? animal
On 11/5/24 12:23 AM, John Dammeyer
wrote:
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I¡¯ve
passed on your email to Donald at Bergerda
so he¡¯ll know that you were recommended by me.
John
?
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??? I need to find pricing for these Bergereda motors .? John
I think we may have the same mills ?? I noticed that the lower
spindle Collar? on my spindle was loose letting the spindle
move up & down in my spindle quill . Have ya ever had this
issue with yours ? If so should I just tighten it as much as I
can & reinstall or did ya find there was a sequence to do
that . SO far I haven't found much on this machine & the
manual looks like it was made by a drunk 4 year old with a
Etch-A-Sketch .
Thanks
animal
On 11/3/24
11:49 PM, John Dammeyer wrote:
I¡¯m
now running Bergerda AX Servo¡¯s on all axis with the
exception of the 4th Axis Harmonic drive which
has a 3 phase motor but a different Servo Driver.
?
Bergerda
does make a lot of motors for the sewing industry.? One time when I was
having some tuning issues their engineers made a quick
video using a cell phone and sent that to me to help me
out.? Great
support!
?
John
?
?
??? When ya say servo , are ya talking like one of those
Consew sewing machine servo motors ? I had forgotten all
about those units .
??? thanks
??? animal
On 11/3/24
1:21 AM, John Dammeyer wrote:
Here¡¯s
a photo of the original parts.? Thrust bearing at
the bevel gear end set the end play.? The shaft sat in
the cast iron and there was dramatic end play but then
it was designed to be turned slowly by hand.
?
At
the gear end the thrust bearings pressed against the
gear and the cast iron.?
I replaced the cast iron side with an bearing
instead of a bushing.
?
At
the crank end I replaced the bushing with bearings and
spacers and took out the end play to the bevel gear.? Now I can spin this
to get 150 IPM on the knee which is scary fast.
?
First
trial was with a 650 oz-in stepper motor with 4:1
reduction.? If I
was lucky I got 10 IPM before the motor locked up.? Stepper motors
cannot turn fast.? Changing
to a 1200 oz-in motor gave me 25 IPM and that worked
until the GECKO controller developed corrosion on the
terminal connector and failed.
?
From
there I changed out the motor to a 750W AC Servo good to
3000 RPM and now have 150 IPM.
?
Eventually
I¡¯ll drive the vertical screw directly to reduce
backlash but for now it¡¯s been pretty good.
John
?
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?
Hit send too fast . The knee is the one that I will
probably convert first . I had my chest cracked 7 years
back & thinks like raising/lowering the knee reminds
me that that work\was done to me . I have one of those
electric seat motors , but i don't think it has enough
power for this . I think my next plan is to remove the
table & go down to the knee mechanism & clean,
lube & adjust my way back up to the table .? I would
be interested to see how ya / yer bud did the Stepper?
& DC motor install .
thanks
animal
On 11/2/24
11:19 PM, mike allen wrote:
??? Sorry Forgot to mention , ye it's a knee mill I was
told it was purchased new in the 80's . It Came from KBC
tool's . I got it from the original owner whose work was
95 % plastic , no steel & some aluminum . He made
some kind of optics stuff .
thanks
?animal
On 11/2/24
10:48 PM, John Dammeyer wrote:
Does your mill have a knee or does the head assembly move?? That's easier than moving the quill and leaves the quill as a manual option.
?
There are all sorts of ways of doing this.? For the longest time I had a stepper motor on the knee shaft that I ran from one of my ELS units.? I could set zero where I was milling and then if I wanted to do a 0.010" cut just move the knee by that distance.
?
A friend of mine with the same type of mill just added a DC motor with a variable power supply and a couple of toothed belts and uses it to avoid major tedious cranking operations.
?
Or, start thinking about CNC now and start the conversion.? Just do the Z axis to start.? Whatever controller you use add a pendant with an MPG and now you are on the way with adequate control.
?
-----Original Message-----
From: [email protected] [mailto:[email protected]] On
Behalf Of mike allen
Sent: November 2, 2024 10:27 PM
To: [email protected]
Subject: [digitalhobbyist] Diy Powerfeed for mill
?
? Finally got my mill in my machine room & under power . Wondering if
anyone here has come up with a DIY powerfeed that could be used on a mill .
?
thanks
?
animal
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