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Re: What projects are you doing?
Project? ?
My last big project was a CNC conversion of a HF Mini Mill. ?I added computer contoled motor to all three axes. ? Now I¡¯m on to the current project which is robotics parts. ??
Many of the parts are 3D printed but there are metal parts that need turning and some milling. ?And some of the plastic parts need finish work on a machine tool.
3D printed plastic is only about as accurate as metal castings so I have to machine the plastic where it touches precision metal parts. ?The Mini Lathe and mini Mill are good enough for this because I don¡¯t need to make high-precision parts like bearing races. ?I buy sealed bearing units and press fit them into the plastic parts. ?I make the metal shafts and other small parts. ?In total, there are 12 motors, 60 sealed bearing units, 24 timing belts, and lots of?opportunities to do small-scale machine work
The current project is a robot quadruped that is the size of a small dog. ?It is based on a design by ODRI but redesigned for lower cost. ?Right now I am prototyping parts, nowhere near ready to assemble a complete robot. ?That may happen in 2024. ??
Someone at a university made a video that shows the basic design and then the parts inside. ?All the details are different in mine but the basic plan is the same. |
Here is one of the subassemblies in my version. ?You will need to use the ¡°exploder¡± to see inside and the rotating in 3D to see the exploded parts.?https://a360.co/4abPa2f
My advice about ¡°setting up a lathe¡± ¡ª Make parts, then if the parts don¡¯t come out with enough quality, figure out why and fix that problem. ?This way you only fix what matters and you actualy get stuff done.
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On Dec 10, 2023, at 9:11?AM, Ryan H via groups.io <ifly172@...> wrote:
Nothing major here currently. Last project was making some inserts for dining room chairs. They're threaded 9/16 x 16 on the outside and 3/8 x 24 on the inside. Neither are common in the real world anymore and weren't easily available. Single pointed the outside and tapped the inside.?
On Dec 10, 2023 at 10:50?AM -0500, davesmith1800 <davesmith1@...>, wrote:
Right now I my projects is setting up my lathe .? Now what is next?
Dave?
Re: What projects are you doing?
Just finish a 22 caliber pellet gun slug maker. I use mine mostly for making nickel silver ferrules and seat hardware for fly rods. But you never know what I will do next. Have the mini-mill also.
On Sun, Dec 10, 2023 at 5:49?PM CBJessee-N4SRN < cbjesseeNH@...> wrote: Doing a Hemingway Kits Machinist¡¯s Hammer and Gray Kits Machinist¡¯s Clamps as learning projects. I¡¯ll also step through some TouchDRO videos on using the app while machining on the lathe to learn the new DRO I¡¯ve installed. It worked out pretty good with only 0.0002¡± difference between my indicator and the DRO over a 6in 2-3-6 block.
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Re: What projects are you doing?
Doing a Hemingway Kits Machinist¡¯s Hammer and Gray Kits Machinist¡¯s Clamps as learning projects. I¡¯ll also step through some TouchDRO videos on using the app while machining on the lathe to learn the new DRO I¡¯ve installed. It worked out pretty good with only 0.0002¡± difference between my indicator and the DRO over a 6in 2-3-6 block.
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Re: 7x16 Spindle to Tailstock Alignment Test Outcome
Thanks for all the thoughts and suggestions!
It comes to mind, I should check with the test bar in the spindle alone, without the tailstock. There should be no deflection issue running an indicator down the bar, so I might find whether the headstock or tailstock has greater influence on my machine.
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Re: 7x16 Spindle to Tailstock Alignment Test Outcome
Like Mark says, it's basically up to you. If you're happy with that you're good to go!??I wanted better so I tinkered and adjusted a lot. I replaced the two bolts in the back of the headstock with hex heads so I could work with them easier than the allens that came factory in mine. A shim here, a tap there with a rubber mallet, tighten, cut test adjust... Over a 8" test bar I got mine under .001" vertical and horizontal with a dial indicator on the saddle and with a live center in the tailstock I can turn 11" of a 12" length of 12L14 within .001" from tail to chuck. If you're happy with .005" over 10" you're good to make chips but if you're going to be doing some longer parts ( I was and needed more precision ) the lathe is capable of doing it if you're willing to put the time into adjusting it.?
Ryan?
On Dec 10, 2023 at 1:21?PM -0500, Mark Kimball <markkimball51@...>, wrote:
If you got those numbers with no shims under your headstock and no adjustments to your tailstock I'd say that is pretty darned good.? Since you now have a nice test bar you can tweak it as much as your patience and ambition allow.
Mark
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Re: 7x16 Spindle to Tailstock Alignment Test Outcome
If you got those numbers with no shims under your headstock and no adjustments to your tailstock I'd say that is pretty darned good.? Since you now have a nice test bar you can tweak it as much as your patience and ambition allow.
Mark
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Re: What projects are you doing?
That sounds like me.?
Most mined has been tooling for work.?
Fun to do but in retirement is not there.?
Dave?
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Re: 7x16 Spindle to Tailstock Alignment Test Outcome
It depends on your expectations, Bret. I would have expected better but have lived with worse!? ?Bill in Boulder
On Sun, Dec 10, 2023 at 9:34?AM CBJessee-N4SRN < cbjesseeNH@...> wrote: I¡¯ve installed a new 16in bed on my 7x12 LMS 4200 mini-lathe and added a new tailstock with DRO. I sent for a 350mm MT3 Test Bar from India rated 0.0001¡± runout (not defined) and mounted it between the spindle and a live center in my fully retracted tailstock quill. After a low speed spin as I tightened the tailstock up. I mounted an indicator on top of the compound slide and ran it ~8in from the tailstock end as close as I could get my carriage to the spindle.
With the indicator vertical on the top surface of the bar, maximum change was 0.004¡±, horizontal on the front surface the maximum was 0.0025¡±.
Given the tolerance stacking across all the stationary/moving parts, that comes to a maximum deviation of 0.0005¡±/inch Z-axis. For such a mini-lathe, is that in the expected/acceptable range for hobbyist work?
BRET
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Re: What projects are you doing?
Nothing major here currently. Last project was making some inserts for dining room chairs. They're threaded 9/16 x 16 on the outside and 3/8 x 24 on the inside. Neither are common in the real world anymore and weren't easily available. Single pointed the outside and tapped the inside.?
On Dec 10, 2023 at 10:50?AM -0500, davesmith1800 <davesmith1@...>, wrote:
Right now I my projects is setting up my lathe .? Now what is next?
Dave?
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7x16 Spindle to Tailstock Alignment Test Outcome
I¡¯ve installed a new 16in bed on my 7x12 LMS 4200 mini-lathe and added a new tailstock with DRO. I sent for a 350mm MT3 Test Bar from India rated 0.0001¡± runout (not defined) and mounted it between the spindle and a live center in my fully retracted tailstock quill. After a low speed spin as I tightened the tailstock up. I mounted an indicator on top of the compound slide and ran it ~8in from the tailstock end as close as I could get my carriage to the spindle.
With the indicator vertical on the top surface of the bar, maximum change was 0.004¡±, horizontal on the front surface the maximum was 0.0025¡±.
Given the tolerance stacking across all the stationary/moving parts, that comes to a maximum deviation of 0.0005¡±/inch Z-axis. For such a mini-lathe, is that in the expected/acceptable range for hobbyist work?
BRET
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What projects are you doing?
Right now my projects is setting up my lathe .? Now what is next?
Dave
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Re: Milling attachment for mini lathe
This one looks exactly like the one I had.? The spindle took
collets directly but they were Wade special and it came with a
full set by 1/64" up to 1-1/16".? If I remember correctly it had a
1-3/8" spindle bore.
Paul
On 12/9/2023 7:19 PM, mike allen wrote:
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I just spent some time over on Tony's site lookin at some Wade
lathes . They made some nice lookin units . Not sure which Wade
ya had butyh theres 2 different Wade's to choose from on the
site . This is from the first one
the American Wade .
I dug this feature they had
Wade
8A with the seldom-found "overhead" - a round-belt-driven
assembly for powering high-seed milling and grinding spindles
held in the toolpost
For
kicks heres the other Wade & I like their lathes too .
the English Wade .
thanks
animal
On 12/9/23 10:47 AM, Paul Loyd wrote:
In the late 50's I bought a 8"
Wade toolroom lathe that was reportedly made in 1939 for
$275.? It came with a beautiful Wade milling attachment
that replaced the compound.? It had a degree graduation
and swiveled like the compound, and had a excellent little
vise that looked like a miniature mill vise, it also
swiveled and had graduations.? I still regret selling that
lathe but divorce can do that to a guy.
For years there have been "Milling Kits"
comprising an angle bracket that mounted the compound
vertically?as a slide and a table/vise that mounted on
the compound. At least 100 years old.? Bill
Wish
that was around 45 years ago
Thank you
Dave?
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Re: Milling attachment for mini lathe
I just spent some time over on Tony's site lookin at some Wade
lathes . They made some nice lookin units . Not sure which Wade ya
had butyh theres 2 different Wade's to choose from on the site .
This is from the first one
the American Wade .
I dug this feature they had
Wade
8A with the seldom-found "overhead" - a round-belt-driven
assembly for powering high-seed milling and grinding spindles
held in the toolpost
For
kicks heres the other Wade & I like their lathes too .
the English Wade .
thanks
animal
On 12/9/23 10:47 AM, Paul Loyd wrote:
toggle quoted message
Show quoted text
In the late 50's I bought a 8"
Wade toolroom lathe that was reportedly made in 1939 for
$275.? It came with a beautiful Wade milling attachment that
replaced the compound.? It had a degree graduation and
swiveled like the compound, and had a excellent little vise
that looked like a miniature mill vise, it also swiveled and
had graduations.? I still regret selling that lathe but
divorce can do that to a guy.
For years there have been "Milling Kits"
comprising an angle bracket that mounted the compound
vertically?as a slide and a table/vise that mounted on the
compound. At least 100 years old.? Bill
Wish
that was around 45 years ago
Thank you
Dave?
|
Re: Milling attachment for mini lathe
In the late 50's I bought a 8" Wade toolroom lathe that was reportedly made in 1939 for $275.? It came with a beautiful Wade milling attachment that replaced the compound.? It had a degree graduation and swiveled like the compound, and had a excellent little vise that looked like a miniature mill vise, it also swiveled and had graduations.? I still regret selling that lathe but divorce can do that to a guy.
For years there have been "Milling Kits" comprising an angle bracket that mounted the compound vertically?as a slide and a table/vise that mounted on the compound. At least 100 years old.? Bill
Wish that was around 45 years ago
Thank you
Dave?
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PDF files on Chuck backing plates? I purchased a backing plate for a 5" 4 jaw chuck to a? 4" lathe mount from My Little Machine Shop.? Dave?  
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Re: Milling attachment for mini lathe
For years there have been "Milling Kits" comprising an angle bracket that mounted the compound vertically?as a slide and a table/vise that mounted on the compound. At least 100 years old.? Bill
Wish that was around 45 years ago
Thank you
Dave?
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Re: Milling attachment for mini lathe
Wish that was around 45 years ago
Thank you
Dave?
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Re: Milling attachment for mini lathe
Can drill new holes to add AXA Holders (eBay item 204144301081, not mine): 
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Machinist's Tools for Sale
Been cleaning out and have a number of items for sale; if you are not local to the greater Harrisburg, PA area, all prices noted are plus s/h. Unless noted otherwise, items are unbranded: UPDATED 1/18/24 @ 17:25 EST; 0XA Storage Blocks SOLD7x16 Backsplash, Used VG $10:  Please ask questions or message if interested so can calculate total and s/h. Thanks!!
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Re: Milling attachment for mini lathe
Looks great .
I have a AXA since 1970's.? They did not make the OXA size in the 1970's?
Thank you for photo
Dave?
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davesmith1800
