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Learning how to build Lotus Seven replicas...together!
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PostPosted: February 8, 2020, 1:01 pm 
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Mid-Engined Maniac

Joined: April 23, 2006, 8:26 pm
Posts: 6145
Location: SoCal
TRIAC-controlled devices are notorious for spewing tons of EMI due to their non-synchronous switching. Try running your garage radio or even your cellphone with the lathe running and see how it goes. I would like to think that this issue is no more (your post mentioned a DIAC,) but given that the box very likely came from China, EMI issues aren't exactly a priority when us Americans only want cheap, cheap, cheap.

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PostPosted: February 8, 2020, 4:38 pm 
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Joined: October 19, 2012, 9:25 pm
Posts: 3315
Location: Summerville, SC
KB58 wrote:
TRIAC-controlled devices are notorious for spewing tons of EMI due to their non-synchronous switching. Try running your garage radio or even your cellphone with the lathe running and see how it goes. I would like to think that this issue is no more (your post mentioned a DIAC,) but given that the box very likely came from China, EMI issues aren't exactly a priority when us Americans only want cheap, cheap, cheap.


I'm sure the EMI is horrible. I can add a torroidal choke if I need to. I have the TV in the garage, and no ill affect to my WiFi.
I had YouTube streaming music the whole time I worked last night.

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Too much week, not enough weekend.

OOPS I did it again
http://www.locostusa.com/forums/viewtopic.php?f=35&t=17496

Blood Sweat and Beers
http://www.locostusa.com/forums/viewtopic.php?f=35&t=15216


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PostPosted: February 10, 2020, 9:59 am 
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Joined: October 19, 2012, 9:25 pm
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Location: Summerville, SC
Not much work done in the garage this weekend, but I did get a couple of things started.

First, The Boy came up on Saturday. He's getting married in May and I agreed to build an arch. He and Fiancee had shared a couple of pics, so last weekend I cut a little bit of steel. They wanted 7 feet tall and 5 feet wide, a simple rectangle frame that flowers will dress up.

I was thinking a ladder frame that would be free standing. I sketched it up and he says "Nah, too much. I looks like it should be in a garden." He takes the pencil and draws a single bar arch with feet. Easy Peasy. We knocked that out in about an hour, sorry no pics.

Yesterday Church, Lunch, and some shopping with Baby Girl who was also in town.
Mid afternoon Wifey Dearest and I headed to Lowe's to get the plastic endcaps for the steel tubes for the arch. While we were there I grabbed a quart of machine gray.

First coat on the mill and the lathe
Attachment:
mill.png
mill.png [ 338.36 KiB | Viewed 2520 times ]


Attachment:
lathe 13.png
lathe 13.png [ 562.79 KiB | Viewed 2520 times ]


I have to paint all the tight spots and put on a second coat. The bed and tool tray still need the first coat. You can only deal with paint fumes for so long.

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Too much week, not enough weekend.

OOPS I did it again
http://www.locostusa.com/forums/viewtopic.php?f=35&t=17496

Blood Sweat and Beers
http://www.locostusa.com/forums/viewtopic.php?f=35&t=15216


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PostPosted: February 11, 2020, 1:29 pm 
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Joined: November 13, 2009, 9:31 pm
Posts: 133
Location: Connecticut
Looking good!

I'm thoroughly envious... :mrgreen:

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PostPosted: February 17, 2020, 10:33 am 
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Joined: October 19, 2012, 9:25 pm
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Location: Summerville, SC
Good times in the garage this weekend.
Saturday I gave the tired old lathe a little more love. While I was working on another project I just started it up and let it run for a while.
I had spindle speed roughly 1000 rpm, forward gears engaged, and gearbox set for 13 threads per inch to have the lead screw spinning at a good rate.
I just let is run for a while to warm up/ loosen up.
Good news is the treadmill motor setup seems quite happy. The SCR and bridge dissipate heat into the heavy frame of the lathe. No issues with heating.
Other good news is after a while the gear train bearings / bushings quieted down some, or maybe I went deaf, but it seems better.

Once I was done swapping rubber on the A Mod I turned off the lathe and slathered on some more rustoleum.
Attachment:
lathe 14.png
lathe 14.png [ 777.36 KiB | Viewed 2370 times ]

Attachment:
lathe 15.png
lathe 15.png [ 791.31 KiB | Viewed 2370 times ]


As of now, she's ready to do work.
There are a couple more things I want to do, but no real hurry.
First, buy a quick change tool holder. That's not a must have, but it is a nice to have. Will save a good bit of time when I'm actually doing work instead of thinking about work.
Second, make a back tray and paint it to match. That's to keep chips and cutting fluid contained. I don't really want to sling oil all over my garage walls.
Third, and WAAAY down the list would be a coolant pump / recirculation system, but that's a far distant thought.

Next up is help Briggs with his lathe conversion.

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Too much week, not enough weekend.

OOPS I did it again
http://www.locostusa.com/forums/viewtopic.php?f=35&t=17496

Blood Sweat and Beers
http://www.locostusa.com/forums/viewtopic.php?f=35&t=15216


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PostPosted: February 17, 2020, 11:24 am 
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Joined: October 19, 2010, 11:57 am
Posts: 506
Location: Waterloo, WI
Looks fantastic. I hadn't even noticed that it didn't have a back tray. Yes, that is definitely a must!

Well done! :cheers:

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PostPosted: February 17, 2020, 11:58 am 
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Joined: July 17, 2008, 9:11 am
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Location: West Chicago,IL
Great looking lathe (now!)

Hope it gives you, what, another 60-70 years of service?

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“Any suspension will work if you don’t let it.” - Colin Chapman

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PostPosted: June 13, 2020, 9:10 am 
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Joined: March 30, 2011, 7:18 am
Posts: 1619
Location: central Arkansas
The Craftsman Commercial is *based on* the common Atlas lathe, but almost every casting is different. Flip side, few of the unique pieces are likely to break, and the Commercial is beefier almost everywhere.


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