CamBam
News:
 
*
Welcome, Guest. Please login or register.
Did you miss your activation email?
November 22, 2019, 00:04:57 am


Login with username, password and session length


Pages: 1 ... 12 13 [14]
  Print  
Author Topic: Metal Nibbler Three  (Read 81776 times)
Bob La Londe
CNC Jedi
*****
Offline Offline

Posts: 3752


^ 8.5 pounds on my own hand poured bait.


View Profile WWW
« Reply #195 on: May 02, 2019, 19:04:05 pm »

Although they're not the least-expensive, in all cases I've either been very-satisfied with the products McMaster-Carr sells, or they have graciously taken them back at no cost to me.  And that has happened only rarely in the last 20 years of dealing with them.

Lloyd

Yeah, but a way cover won't show its true colors for a few to several months.  Then when it has failed its really no longer returnable. 
Logged

Getting started on CNC?  In or passing through my area?
If I have the time I'll be glad to show you a little in my shop. 

Some Stuff I Make with CamBam
http://www.CNCMOLDS.com
lloydsp
CNC Jedi
*****
Offline Offline

Posts: 8060



View Profile
« Reply #196 on: May 02, 2019, 19:13:58 pm »

Eh... they're pretty generous about things like that.  I'm betting they'd probably guarantee it in normal service for about a year.

Lloyd
Logged

"Pyro for Fun and Profit for More Than Fifty Years"
Bob La Londe
CNC Jedi
*****
Offline Offline

Posts: 3752


^ 8.5 pounds on my own hand poured bait.


View Profile WWW
« Reply #197 on: May 05, 2019, 20:04:37 pm »

I hope its made of some miracle fiber.  Its a lot lighter than I expect.  

I used the machine some the last few days, but using the giant vise was a bit tricky.  


* Hole in My Enclosure.JPG (282.79 KB, 2080x1170 - viewed 79 times.)
Logged

Getting started on CNC?  In or passing through my area?
If I have the time I'll be glad to show you a little in my shop. 

Some Stuff I Make with CamBam
http://www.CNCMOLDS.com
Dragonfly
CNC Jedi
*****
Offline Offline

Posts: 2216



View Profile
« Reply #198 on: May 07, 2019, 13:40:20 pm »

Old cars used to have such a hole on the front bumper. For the big starter key Smiley
Logged
lloydsp
CNC Jedi
*****
Offline Offline

Posts: 8060



View Profile
« Reply #199 on: May 07, 2019, 21:41:54 pm »

I had a tractor for nearly two decades (80s and 90s) with a 'big key hole' just like that!  A 1957 Ford 8N, fully-restored, and used almost every day during the warm months (April through September).

I never once had to hand-crank it, though, and glad for it!  There were a LOT of stories circulating about men getting broken arms due to a backfire!

Lloyd
Logged

"Pyro for Fun and Profit for More Than Fifty Years"
Bob La Londe
CNC Jedi
*****
Offline Offline

Posts: 3752


^ 8.5 pounds on my own hand poured bait.


View Profile WWW
« Reply #200 on: May 07, 2019, 22:11:14 pm »

My dad has my grandfathers old 1950s John Deere Model M.  I used it a few times for harvesting grapes and sweet corn.  Don't recall a crank hole.  It always just started. 

For the crank hole on the mill.  Obviously I need to cleanup the bur left by the hole saw, but you can't even see the hole when the doors are closed on the table top enclosure.  I think on the inside to deflect spray I'll probably mount a neoprene or buna rubber flap.  Currently I am using an air ratchet with a short extension to operate the vise, but the plan is to make a speed wheel with a slightly extended single diameter shaft so the flap doesn't hang on it when its pulled out.  I'll mill a close fit hex pocket on the end with a taper for the first 1/4 inch or so of depth.  For now the air ratchet works except that I knock the socket off every other time I use it. 
Logged

Getting started on CNC?  In or passing through my area?
If I have the time I'll be glad to show you a little in my shop. 

Some Stuff I Make with CamBam
http://www.CNCMOLDS.com
Bob La Londe
CNC Jedi
*****
Offline Offline

Posts: 3752


^ 8.5 pounds on my own hand poured bait.


View Profile WWW
« Reply #201 on: November 10, 2019, 22:04:10 pm »

As I mentioned in Chuckeroo's Y-Axis thread the Y-axis on Metal Nibbler Three has had chronic issues over the years.  I swapped out the 1:1 timing pullies to a 2:1 setup with a 14T 1" L pulley on the motor and a 28T pulley on the ball screw.  It seems to be working great.  I had to set the resolution down to 10K pulses per inch, but it works.  It actually worked at the same speed and acceleration, but I I turned it down a little anyway just for safety. 

I have not run it hard yet.  By hard I mean half day long jobs cutting steel.  I have run it all day long a couple days rough cutting 18 minute jobs with a 1/2" end mill in aluminum.  In 9 hrs I probably got 7hrs of actual machining time.  I didn't constantly temperature monitor the motor, but the handful of times I ran the saddle back and reached inside the knee to feel the motor it was as no warmer than any of the other motors. 

Logged

Getting started on CNC?  In or passing through my area?
If I have the time I'll be glad to show you a little in my shop. 

Some Stuff I Make with CamBam
http://www.CNCMOLDS.com
Bob La Londe
CNC Jedi
*****
Offline Offline

Posts: 3752


^ 8.5 pounds on my own hand poured bait.


View Profile WWW
« Reply #202 on: November 10, 2019, 22:07:51 pm »

I cleaned two full 5 gallon buckets of chips (and another couple in the vacuum) after those two days.  I had to clean it out.  Coolant was starting to run out the vise handle hole in the front of the enclosure. 
Logged

Getting started on CNC?  In or passing through my area?
If I have the time I'll be glad to show you a little in my shop. 

Some Stuff I Make with CamBam
http://www.CNCMOLDS.com
Pages: 1 ... 12 13 [14]
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.21 | SMF © 2015, Simple Machines

Valid XHTML 1.0! Valid CSS! Dilber MC Theme by HarzeM
Page created in 0.113 seconds with 19 queries.

Copyright © 2018 HexRay Ltd. | Sitemap