Warco Major CNC build log

[Robin Hewitt]

Spindle housing now bolted together and impossible to assemble :nope:

Have to add a bit of internal clearance so the pulley can get past the belt :whistling:

Measured the resistance top to bottom, slightly worried when I found 8 million Ohms then realised I was in the circuit. Moved fingers and it went away

[Robin Hewitt]

Stuck waiting for bits

Did add an air driven spindle lock, now working on the suds nozzles.

Bill says it's a z axis lock and he's right

[BillTodd]

Stuck waiting for bits

Did add an air driven spindle lock, now working on the suds nozzles.

Is that a spindle lock or a Z axis lock?

Have you a picture of the whole 'honking plate' z axis? (looks good :))

[Robin Hewitt]

Is that a spindle lock or a Z axis lock?

Have you a picture of the whole 'honking plate' z axis? (looks good :))

By Jingo you're right, I used the wrong word :heehee:

You want a picture from a different angle?

Have to fix a front gate this afternoon. Strict instructions, on pain of nagging :naughty:

[BillTodd]

You want a picture from a different angle?

Just a wider angle showing the whole of the axis would be good :)

[Robin Hewitt]

Just a wider angle showing the whole of the axis would be good :)

Here 'tis, and here's a link to the 1.7Mb original image http://www.robinhewitt.net/big.jpg

I left the Z screw detached from the honking plate, it bolts on from below sort of thing
Next I have to fix the ball screws, I didn't look after them and 10u backlash has become 75u, at least I think it's the screws. Have decided to spring the nuts and go for true zero backlash :naughty:

Assuming 1Nm on the screw is enough to move the table under all circumstances, that's 1256N force on the nuts, call it 280 lbf because I don't think in Newtons :heehee:

I have the design, appropriate Belleville washers have been purchased, waiting for the oil pipe fittings, blooming postal strikes, grumble moan complain.

[Robin Hewitt]

Testing out my new quill lock then the quill jammed

Two hours finding the problem. Thought I'd got cast iron dust in the guide when I drilled the holes for the pneumatics. Hadn't. Though the clamp was binding. Wasn't. Thought I'd deformed the quill with excessive locking force. Didn't. Thought it had to be gunge, fetched the quill out and got it clean enough to eat off. Did no good.

If your Warco quill seizes up for no apparent reason and defies all efforts to free it I have the solution. 2 minute job, miracle cure, no disassembly required, will cost you a bottle of Hobgoblin posted to Sussex :naughty:
Quill now tracks up and down easy peasy, the Z depth on the computer screen agrees with the linear scale on the mill +-0.01mm moving in either direction. However, cutting forces can put them up to .05mm out. Hence pneumatic quill lock.

Yes, I know 0.05 is only 2 thou