Last Activity:03-27-2017 9:28 AM
Likes Given: 137
280 Likes on 217 Posts
Posted in thread: Trying out metric on 03-26-2017 at 06:23 AM
In my first year at university in 1978 when most of us worked in imperial units in everyday
life, the lecturer calculated the power output by an engine in SI units and came up with the
result in kW. I...
Posted in thread: Trying out metric on 03-25-2017 at 11:15 AM
Cogsy, I'm on your side. Like you I live in Australia which converted to metric in 1966 with
what is acknowledged as being the most successful metrification project ever ran. Like you I am
old enough ...
Posted in thread: chuck screw on 03-18-2017 at 10:25 AM
I spent quite a few hours with a file and emery paper over several sessions before the 4 jaw
chuck bundled with my lathe was as smooth as silk. It may help to apply some engineers blue and
look to see...
Posted in thread: another 4th axis...... and a 5th on 03-15-2017 at 09:34 AM
Blighty, if you are in the UK, maybe also look at RS Components I've bought a couple of pulleys
from them and they were reasonably priced. T5 is a metric size (5mm pitch). My stepper
reduction drives ...
Posted in thread: Indexing head on 03-14-2017 at 09:42 AM
I'd wait until you try it, you might be surprised how much holding torque your stepper motor
Posted in thread: another 4th axis...... and a 5th on 03-14-2017 at 09:36 AM
Blighty, When I did my tests I used a cheap $10 tacho off ebay to measure RPM of an unloaded
stepper. You can calculate the RPM and compare with what you measure to see if you are missing
steps. Once ...
Posted in thread: another 4th axis...... and a 5th on 03-13-2017 at 10:17 AM
Blighty, I will be very surprised if you can get up to 50x microstepping. There are a lot of
other timing issues that will impact and limit speed in the real world. In my instance, I have
Posted in thread: How do I machine this? on 03-12-2017 at 11:35 AM
I have a photo, but can't work out how to attach it to this post.Thanks in advance of any help
with this.Open an account with Photobucket and upload your image there and it will have a ready
Posted in thread: Nut & Bolt Sizes. on 03-12-2017 at 11:30 AM
I would say your collection contains some imperial threads. Here are the metric sizes bolts I
buy are about 0.2mm undersize. If it were me, I'd toss out anything that was not a metric
thread on accou...
Posted in thread: Help required with threading inserts on 03-12-2017 at 11:22 AM
I wasn't criticizing you Rod, I had already looked about for some items and the one you showed
caused me to have a sharp intake of breath.JohnNo offence taken, your sharp intake is due to