MadModder

A couple of weeks ago, at a car boot sale, I bought 3 flat irons as a potential source of cast iron. The first thing that I did with them was to put them in my furnace and heat them up to red heat and then allow them to cool overnight just in case that they had been chilled when originally cast.
Today I wanted to make a chuck backplate for a small lathe that I am making. I trimmed the first one down to a squarish shape with my trusty angle grinder and popped it into the four jaw chuck on my lathe. After facing it off I was surprised to see that it had four large cracks (only 3 to be seen in the photo) making it useless for this project, although there is enough uncracked material for future smaller projects.
I tried again with the next one and was delighted to find that it had no cracks. Mind you it is tough material, I could only take 5 thou deep cuts otherwise the belt would slip on my flat belt drive lathe. When you consider that I was using an irregular shaped piece of iron there was a lot to remove before I got to a round shape, but it was worth it!

I suspect its connected with probing!

When Z+ stops working, if I do a probe Z+ it starts to probe DOWN at a stupidly slow rate! Its as if it thinks it has found the limit switch at Z+ and is now very very slowly coming off the micro-switch in the Z- direction ( as it should do fairly quickly) to the probe offset position (5mm in my case)

HTH Will

BTW the DoseDone forum has gone a bit quiet recently!!:

http://www.ddcnc.com/forum.php?mod=forumdisplay&fid=41

I have noticed an axis stopping semi-mysteriously, but it's always been a triggered limit switch.

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Hanging around this morning waiting for a delivery of cladding for the chicken shed so I thought I'd have a go at exposing the two Jacklegs that or obstructed by overgrown fencing.

Jackleg C was behind an amazing growth of Ivy - one root of which resisted until I gave up trying manually and tucked the bucket of the JBC803 behind it to show who was boss. Even so it resisted for a while !

Jackleg D was far easier - relatively little ivy.

Then is was just a case of removing the feather edge fencing sufficiently to allow me to get at the jacking points. Fortunately I saved some identical fencing from a length I removed years ago - all stacked alternately thick / thin edge and tightly banded to prevent warping - they seem to have survived the ravages of time 

Between the two Portakabins is a roof forming an open fronted store used for the ride on Mower - the roof in 'Onduline a bitumen felt corrugated and slightly flexible material. As this Portakabin is jacked up the  Onduline is going to have to absorb the movement, although the two sheets nearest the gable end will have to be removed to give access. One sheet has sagged and needs replacing anyway as vegetation has built up on it and water has puddled over the years.

 . . .OK done all that and the cladding is still not here 

 

Quote from: Will_D on April 15, 2018, 05:58:57 AM

I am starting to suffer this but only on the z axis. It will jog down but not up. Power off and wait resets it.

I am running the [Install_2018-01-21_91] new 2.1 version.

I may well go back to the stable 2017 version for 1.1

When it freezes, do your other axis still work?

Yes X and Y are unaffected

That's just a normal three phase motor, or a single phase, or a large hamster in a running wheel.

One pulse per rev is all you need to cnc turn threads.

I have a party trick (which I can't find video of). 2 start tapered ACME thread. All done with......wait for it......one pulse per rev.