Recent Posts

Pages: 1 ... 7 8 [9] 10
81
CNC / Re: My CNC Router
« Last post by vtsteam on July 03, 2025, 03:46:43 PM »
That's really nice Andrew!  :thumbup: :thumbup: :clap:

I wonder if the one I have is for engraving? That would make sense because of the size. I'll have to dig it out and get a photo of it to post.

Meanwhile, I started in on the adapter ring for the 500 watt spindle.

  [ You are not allowed to view attachments ]  

  [ You are not allowed to view attachments ]  
82
CNC / Re: My CNC Router
« Last post by awemawson on July 03, 2025, 01:00:33 PM »
I made it for engraving lettering on labels etc - I used the smallest centre drill that I could find as the cutter.

It seems it was 20 years ago !

  [ You are not allowed to view attachments ]
 
  [ You are not allowed to view attachments ]
 
 [ You are not allowed to view attachments ]  


83
CNC / Re: My CNC Router
« Last post by vtsteam on July 03, 2025, 12:38:30 PM »
That's pretty cool, Andrew.  :thumbup: What did you cut with it?

That also just reminded me I picked up a little turbine spindle, used at one of the old Bernardston Gas Engine shows. Forgot I had it. It was just a curiosity to me, and cheap. Unfortunately, there's no compressed air in the shed where the cnc router is, so I can't use it. Also it's kinda small.  I don't have much of a compressor in my tiny shop near the house, either.

Right now, I'm working on getting the 500 watt spindle fitted to the CNC. Looks like the router mount fits a 70-71mm body, and my 500 watt spindle has a 52mm body. I think I'll keep the existing mount and just make a 71/52mm adapter.

I was rummaging around in my scrap box and found this big chunk of aluminum, so I don't have to cast anything:

  [ You are not allowed to view attachments ]  

84
Project Logs / Re: Making the best of Global Warming
« Last post by awemawson on July 03, 2025, 12:32:09 PM »
Quote from: Joules on July 02, 2025, 05:56:14 PM
I hadn't considered a mini gun Andrew, but now you mention it.  Keep the pigeons and other vermin at bay...
As it happens due to an invasion of crows who eat more feed than the chicken, I'm resurrecting at the moment a propane fueled 'crow scarer'. Cunning device slowly inflates a small reservoir of propane with a diaphragm lid that lifts a mechanism that toggles and discharges the gas into the 4" diameter 24" long barrel and then clouts a piezo element sparking to fire the charge. Throtle valve controls the rate of cycling. It makes a massive bang when it fires :bugeye: Currently awaiting more neoprene as the diaphragm needs replacing before I put it back together.
85
Project Logs / Re: Making the best of Global Warming
« Last post by rleete on July 03, 2025, 12:16:14 PM »
Doesn't it block access to the door for the shed?
86
Resources / Re: Metalworkingfun.net is Back!
« Last post by rleete on July 03, 2025, 12:12:07 PM »
Yeah, I got some neat project ideas from the old posts. 
87
CNC / Re: My CNC Router
« Last post by awemawson on July 03, 2025, 12:10:42 PM »
Steve, I made up a high speed spindle to use in my CNC milling machine many years back using simple bearing but it was driven by an integral air turbine (jet impinging on a small gear wheel), and I arranged it so that the air passed through the bearings downwords and kept the swarf off the workpiece. As the air was lubricated being supplied from a regulator / lubricator it not only cooled but gave the bearings a chance of survival at the very high rpms that it ran at. It's probably kicking about in a cupboard in the workshop.
88
Project Logs / Re: Making the best of Global Warming
« Last post by vtsteam on July 03, 2025, 12:03:09 PM »
Wow, very nice Joules!  :clap: :clap:

Now you just need a thermoelectric panel behind the air conditioner.  :lol:

89
Project Logs / Re: Making the best of Global Warming
« Last post by AdeV on July 03, 2025, 11:47:44 AM »
Oooh, that's swish!

Might I ask where you got it from?

I should really learn to read posts properly & then I wouldn't look quite so stupid answering the question you already answered!

I'd quite fancy one of those in my garden... Also, given a sensible sunny day & not baking hot, what sort of power are you getting from it (instantaneous & over a good day)? I'm guessing you don't have any winter readings yet, given you don't live in Birkenhead  :lol:, but I think that's when the tracker will really come into its own.

BTW - that's a pretty damn competitive price sans panels... very tempting!
90
CNC / Re: My CNC Router
« Last post by vtsteam on July 03, 2025, 10:42:19 AM »
I've got plenty of high quality skate bearings (608 2RS) up to ABEC9 IRC. It wouldn't be hard to make up a spindle with some water pipe as a housing. I think I have some high quality 8mm shaft as well.

I was curious about what the RPM limit was for the skate bearings, and came across this explanation which I found quite humorous:

https://www.ahrinternational.com/Skateboard_bearings.htm
Pages: 1 ... 7 8 [9] 10