Went for a walk first thing – amazing how much infilling is going on. Any garden bigger than a postage stamp seems to have a house being built on it. Followed that by a full fry up; used a new brand of black pudding – excellent and I shall be buying it again.
I finished sawing up the 3m lengths of 1" steel rounds that have been on the workshop floor for several weeks. I have a cunning plan to test a number of tool types on each type of steel and try and assess the conditions (rpm, feeds, coolant or not) versus surface finish.
I cut off a length of 7/16" stainless steel for the bypass valves in the traction engine water pumps and started machining them. But I need to think about the order of operations before I go too much further. If nothing else I need to machine and roll another front wheel rim for the traction engines to replace the one I fouled up, ie, it's not round. Since the vice is on the mill and clocked square I might as well do that before replacing the vice with the dividing head.
I have replaced the old controller on the Tormach CNC mill with the new one that runs their PathPilot software. I had no problems getting the controller installed and running, although it doesn't look quite like the pictures in the guide. However I failed miserably to get the USB wireless dongle to work. It's not clear if the drivers for same are installed. Which brings us to a design flaw in the controller. The driver software is on a mini size CD/DVD but it seems to be impossible to get it into the DVD drive as it is vertical with the controller standing normally. The disk always slips down and can't be read. I'll probably stick with transfering the G-code on a USB stick, which is what I do now.
I managed to get an existing G-code program loaded, which raised another issue. In my post processor script I have a line of G-codes to explicitly cancel various modal commands and ensure that the controller is in metric mode. One of the those codes is G15 equals cancel polar co-ordinates. PathPilot threw up when it saw G15 and said it wasn't recognised. Apparently G15 and G16 are not implemented, so no polar co-ordinates. Can't say I've ever used them but it seems a strange omission.
Most functions such as referencing, axis movement and spindle control seem to work as I expect. I've also been looking a tool tables and tool setting, and like the previous version I got confused. I have an electronic tool setter as I got fed up chipping carbide tooling when 'touching off' to set tool heights. I normally set Z=0 with tool 0 on the table and then use the automated function to touch off each tool on the tool setter. That sort of seems to work, but when using the automated function, and operating the tool setter manually, the movements aren't quite what I would expect. I'm reluctant to badger an expensive (£600+) tool setter to see if the function works the way I think. I'll have to wait until Monday and email Tormach and ask the question.
Now cracked the first of several beers and about to cook a chicken and seafood paella to be followed by some nuts and cheese and oatcakes.
Andrew
Addendum – Finished the first beer – at this rate I'll need to nip to Morrisons tomorrow for a re-stock