I think this may be a similar board to the Triac PC I have and there is a NiMH battery near the comms area which is prone to leak when old and the electrolyte may be effecting the signals in the area. Cleaning the area carefully with distilled or deionised water may help remove any deposits, allow t...

As no one else has replied I'll suggest you might look at a Kalamazoo 5C chuck as it might do what you require https://kalamazooind.com/product/1cc-5c-collet-fixture/ , it can be held in a 3 jaw chuck if required. It doesn't need a drawbar as the threaded rear of the collet is screwed into position ...

For metric cutting with an inch leadscrew or vice versa you only need a 127 tooth gear if you require an exact conversion. There are some other gear combinations which will give a very close approximation which is good enough for most practical purposes and should fit in the standard gear train, you...

It's an L toothed belt which is a 3/8" pitch, the 18L100 would be 18 teeth L belt for 1" wide belt. 150L on the belt is 40 teeth. https://www.bearingboys.co.uk/?catid=1217&display=&orderby=&att1=&att2=40&att3=25.4mm+%3D+1inch&att4= I couldn't say whether they would do 10k RPM, you'd have to check th...

The drawing I found for ML100-512 showed the thread as 1/2" x 10TPI ACME thread so is there a reason not to use an off the shelf offering such as on ebay, both RH and LH are listed.

You don't mention the collets you intend to use but would a Kalamazoo 5C chuck do what you require https://kalamazooind.com/products/5c-collet-fixtures/1cc-5c-collet-fixture-for-chucks/ , it can be held in a 3 jaw chuck if required. It doesn't need a drawbar as the threaded rear of the collet is scr...

There is this thread viewtopic.php?f=43&t=6223 where LinuxCNC has been used with the standard spindle encoders and a simple BOB.

I have the same bandsaw but bought new and as with many of these Chinese items largely just thrown together in the factory with no or little consideration for how well they work but having said that once the issues were dealt with and it set-up correctly it's a great little work horse and now cuts v...

I can't help with the Turn 270 questions but regarding the internal tooling pockets they sound the same as on my Orac toolchanger and I believe 3/4" ID as that's 19.05mm. 3/4" round bar is a spot on fit although I haven't used them so far.

As I understand it you can't disengage the half nuts when cutting a metric thread with an inch pitch leadscrew and vice versa or you'll lose synchronisation even with a threading dial so not much point in making a metric threading dial unless you're going to change the leadscrew to metric. Which QCT...

Why limit yourself to inch thread pitches when you can 3D print a metric conversion set while your at it, either with a 127 tooth gear if it'll fit or one of the very close approximation ratios that suit most practical uses. I think that's what's in my Harrison M300 as it will do both inch and metri...

I think you'll find with the knob in and fine gears engaged it's not locked the carriage to the bed but rather to the leadscrew so if you turn the leadscrew the carriage should move. As there doesn't seem to be any gearing involved it should produce the same movement as the half nuts which the lever...

I think the knob may be the longitudinal feed engagement, when in it will prevent the gear running against the leadscrew from rotating from what I've read and seen so it'll be drive the carriage along the bed. The lower gear appears to be an idler to support the leadscrew preventing it from flexing ...

The T63 is a Dickson toolpost clone, see https://www.lathes.co.uk/latheparts/page13.html , and note the details about varying quality and research your supplier for what they sell. I have a genuine Dickson S1 and a Bison version again S1 or T1 which are both the same size as the T63. Lathes.co.uk me...

Phil, If you haven't come across it already you might want to try the free 3D modeller Freecad for Windows/Mac/Linux https://www.freecad.org/ as it has a gears workbench add on so you can create various types of gears. You'd need to add a cylinder to represent your shaft and subtract it from the gea...

Steve, I got it in the end and it is 1.5Gb which was the issue. It seems large transfers such as that can often be problematic and may fail due to network issues. With Firefox I was getting about 64Mb consistently before it failed, a neighbour got about 325Mb with Windows before it dropped the conne...

Steve, Can you post the ZIP file size as I downloaded it again and no joy. The file fails to unzip on Win10 with a 'failed to create file or directory' error and similar on an iMac. My Ubuntu Linux machine gives and 'unexpected end of file' error. Never had any issues downloading files from the foru...

The file seems to be incomplete or corrupt as initial download indicates 1.4 Gb but only about 60Mb downloads before completion and the resulting ZIP file is said to be invalid.

The control system looks to be from these people https://www.gunt-cnc.com/index.php?m=content&c=index&a=lists&catid=122 so if you can't find a manual on the site maybe contact them to see if you can get further information. More information turns up searching for GTCNC-60TT such as the attached PDF ...

Have you checked the relay coil is OK, after that if you look at the wiring diagram for the ESR power it should give some hints of how to isolate the fault. The axis override switch if it gets it going would indicate a problem in the limit switches or their wiring, then there's motor thermal, drive ...