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CNC / Re: It's new to me
« Last post by ddmckee54 on Today at 12:42:34 AM »
A couple days ago I decided that I really didn't want to wait for more bolts to arrive from an online order to replace the M5x70mm bolts.  My local farm store has a good supply of both Imperial and Metric hardware hardware, that they sell by the pound, not per unit.  Unfortunately anything below 1/4" in imperial, and M6 in metric is sold per unit.  And they don't have socket head cap screws, but I decided I could live with hex head bolts for the spindle clamp.  I found the M6x70mm bin and grabbed 4 bolts.  Unfortunately they did NOT have M6 nylock nuts in bulk.  I got all four of the M6x70mm bolts I needed for less than what one of the M6 nylocks cost me.  While I was checking out, and the checkout lady was scanning the barcode of all the individual plastic packages, I mentioned that all of the nylock nuts should be the same.  She replied that one of them was an M5...  Back to the hardware drawer with the M5 nylock - to get what was the LAST M6 nylock.  Don't blame me, the bin said M6 nylock and we're supposed to trust that - right?

This afternoon after getting the last 0.6mm of extra length removed from the the 8mm Z axis guide rails, I discovered that one of my M6 bolts was not 70mm long, it was only 60mm.  Soooo..... back to the farm store with the 60mm bolt to get a 70mm bolt.  Don't blame me, the bin said M6x70mm and we're supposed to trust that - right?  Since I was already out and about, I decided that I might as well go to the grocery store to get some more chocolate syrup.  I like my ice cream, but I like it with chocolate syrup and nuts.  Funny how you go to the store for one thing, and usually walk out with a lot more than just the one item.  I got the screws installed that retain the bearings in their bores, all that's left to do on the Z carriage before its' final assembly is to install the heat set M3 inserts for the leadnut mounting plate.

Tomorrow I'll get the X axis leadnut block printing before I do anything else.  While that's printing I can get the heat set inserts installed on the Z carriage, and start working on the X and Z axis leadnut plates.  I finally broke down and ordered some Dykem, magic markers work - butt...

Geez-Louise, pretty soon I'll be down to the fun part - the electrical install and de-bug.
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Member Videos / Re: My week this week, my workshop videos!
« Last post by hermetic on April 18, 2026, 11:39:46 AM »
Hi Folks!
A mish mash of phone and camera this week, which never works well as my editing software  does not like phone ! Will it start? of course it bloody will! A great relief to all involvedfootage! Commando gardening, bramble eradication, dead tree removal, and starting the Fordson after two years in't hedge bottom!
Phil, in pleasantly warm East Yorkshire
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Gallery / Re: USS Monitor Steam Engine Drawings -Free
« Last post by rleete on April 18, 2026, 11:04:47 AM »
Looking forward to the book.  Be sure to post when and where it is available.  Many thanks for this.
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CNC / Re: It's new to me
« Last post by vtsteam on April 15, 2026, 11:42:11 AM »
Yipes, a string of bad luck! I'm sure you'll get it working soon.

This is what I hate about trying to program absolutely everything in advance, as opposed to measuring and cutting during fabrication. Not that fabrication isn't also subject to errors, but with work in hand, often times you can try pieces against each other, or mark from each other, or quickly measure a fastener and the drill bit you are planning to drill it with, etc.

Some people work better one way, others vary from that. I find I make fewer errors in manual work than I do in additive machining, because the latter demands advance perfect location of all features or a part is often ruined. One frequent problem in an imperfect initial rendering: since infill is usually partial to save material and time, relocating or even resizing a hole or other feature is often not feasible.

Nevertheless, I admire anybody who makes the effort by this or any other means and manages to create something in our hobby. I'm sure this mill project will provide rewards when it starts machining other parts!  :thumbup: :beer:
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CNC / Re: It's new to me
« Last post by ddmckee54 on April 14, 2026, 11:56:52 PM »
The Z axis carriage is starting to come together, literally.

The Z axis rail holder was usable, a little oversized but usable - the bearing block was not. Somewhere between the design notes and the cad operator, the understanding got lost that 20mm was the C-C spacing for the mounting holes, and that the remaining 28mm of the 48mm bearing block width was to be used to center the spindle mounting bracket. Somehow the 28mm became the C-C spaving, and the 20mm was split to center the spindle clamp. The 15mm bore for the bearings was over 15.1mm on the unusable part, not exactly a press fit. And NOBODY caught that boo-boo's before the files were cleared for production. When the assembly techs started screaming that the damned thing don't fit and went on break, THAT's when we found it. The rail holder was supposed to be 60mm wide, it measured 60.5mm. I had originally scaled the STL models to 101.5%, I dropped that back to 101.2% when I reprinted the bearing block. I kept the 6 perimeter walls and 80% infill though.

When I reprinted just the bearing block the print time dropped from 8 hours to 3 hours. I accidently ordered M5x70mm bolts, everything was designed around M6 bolts, but these will due for now.
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CNC / Re: It's new to me
« Last post by ddmckee54 on April 13, 2026, 11:31:08 PM »
I had a couple of 3D printing milestones recently, I started printing with something other than PLA and the P1S glitched on me.  Although in all honesty I probably made it worse than it should have been. 

I decided to try PETG, and I wanted to get the scaling dialed in to correct for shrinkage.  I decided that I might as well be printing something useful to do this testing.  My new spindle uses an ER11 collet, so I found an STL for a chip fan that presses onto the collet nut.  The friendly Google AI said the scaling factor should be 100.3-100.8%, so I scaled the fan to 100.5% and gave it a shot, way too tight.  I scaled it to 100.8% and printed it again. It takes less than 1/2 hour to print the fan - including the 7+ minutes the P1S uses for setup on every print.  It was still too tight, but I could force it on the nut.  I printed it again, this time scaled to 101.5%.  It presses onto the nut, not all the way, but since I didn't design the fan I can only guess the designers intentions.  I WAS going to print a fan scaled to 102%, but that's when the glitch occurred.  I started the print and left to do something else.  When I came back about 15 minutes later I had a bird's nest on the print bed.  It happens, so I did what I do when the D6 screws up late at night - I shut off the power and went to bed.

When I got up the next day and fired up the printer it was not happy with me, the AMS was making very unhappy noises.  I realized that I SHOULD have aborted the print, then shut off the power and gone to bed.  Ain't 20/20 hindsight just wondermus though?  I realized that the filament had frozen in the extruder and that I needed to get it out of the hot end so the AMS could retract it and be happy again.  But, I needed to do that before the AMS was powered up.  I decided to try unplugging the AMS, heat up the hot end, and see if I could pull the filament back by hand - to see if that would work.  I did, and it did - so I decided to try printing again.  All seemed to go well, until it tried starting to print about 50mm above the print bed.  All I could do was abort the print and hang my head in shame wondering "What the Hell did I do to this poor machine?"  Before I contacted Bambu Labs and confessed my sins, I wanted to run the initial calibration cycle again.  I wanted to see if that would let the printer find its' lost marbles. 

I'm proud to report that it worked and the plastic pooping robot is now about 7 hours into an 8 hour print.  That print will give me the Z axis rail holder, and the bearing block that will slide on those rails.

Don
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Gallery / Re: USS Monitor Steam Engine Drawings -Free
« Last post by vtsteam on April 13, 2026, 09:11:40 PM »
Again, thank you Rich for this remarkable gift!  :beer:
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Gallery / Re: USS Monitor Steam Engine Drawings -Free
« Last post by Rich Carlstedt on April 13, 2026, 06:45:46 PM »
What a Klutz  !

I meant to add that anyone who wants the drawings can also send me a note here using messages or use my direct address - grnbaystmr  "AT"  gbonline.com - the AT used here is to divert web searches and spam . use the ast...  and    no dashes

Send theirr home email and I will send them by email in 5 packages .. It's like 29 Meg donload in one shot
and that would get me in trouble with my provider. 
IMPORTANT , The Subject line must say MONITOR  in Caps
Rich
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Gallery / Re: USS Monitor Steam Engine Drawings -Free
« Last post by tom osselton on April 13, 2026, 05:56:42 PM »
Thanks for the info  :beer:
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Gallery / Re: USS Monitor Steam Engine Drawings -Free
« Last post by Rich Carlstedt on April 13, 2026, 03:35:43 PM »
Up Date 2026 - April 13

Yes, The drawings were withdrawn during a web site revision two years ago, sorry about that .
I have been advised they will  be re-posted, and will return to the same web site
It may take a few more weeks for that to occur, so keep trying .

I have spent the past 5 years writing a book (technical) on the engine and all of it's components to help those who downloaded the drawings and those
who wish to know more about the engines' operations and design  and other data from my research
That book is very close to completion and I hope to have it published before years end so I can go back to modeling.
Thank You for your patience , This is a not for profit undertaking

Rich
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