Thread: opps impulsive buy

Originally Posted by azzrock

you beauty. i got this lathe turning over tonight with the vfd. Its by no means a finished job but the lathe runs nice and quite and a bit of round bar in the 3 jaw runs nice and true.


happy happy happy

Beauty, you must be as happy as a pig in sh*t

nearly fred. its a feeling i have all most forgotten

ok a quick update . i have the lathe running and am working on useing the lathe controls to control the lathe not the vsd panel. ie on for spindle fwd and the reverse for spindle rev ect ect. plus ill have to .find a suitable pot for speed control..
i really like the look and feel of the controls so might as well use them.
ive taken a few cuts and have to say im not happy. so i pulled down the cross slide and there is a lot of where in the cross slide screw and nut.
ive all ready managed to get a new nut from the uk for $70 aus..
the screw is another matter. The prises are quite unbelievable..
ill keep looking and if no luck will have a crack a making one.
aaron

I have not tried them and have no connection but have you tried Robert Pringle Engineers in the UK?
Good luck, Mm.

no mm but i will. thanks mate

i haven't got as far as id like with the lathe.
i have used it a few times. ive atarted to level the machine but need to set 0 on my machine level. its hard to find any thing level enough.
there was a fair bit of chatter on the steel i was cutting. after paying a bit more attention to a sharp tool and correct center height cleared that up.
the auto feed only work's in the facing direction. I might have to pull the apron of to have a look.
i still havnt managed to get the vsd answering the lathe controls. ie i have to push run on the vsd instead of use use the lath controls and to stop the lathe press stop. which is very annoying.
besides all that. over 40mm it is cutting a taper bigger towards the chuck of 0.23mm.
so this is a worry and ill have to look if the taper turning attachment is causing this.

Hi azzrock,
You don't really need the level to be set to 0, just as long as you use it the same way around. (once you get the lathe pretty close you should be able to set the level off it)

What size material are you turning how far from the chuck?

What part of the VSD are you having problems with? the VSD settings? the vsd wiring? or the lathe switch wiring?
I have 4 of them somewhere between GUANGZHOU and here lol

Stuart

".010 taper over 40mm,not good would matter what hes cutting unless its a bit of hardened bar and the tool is wearing.

Originally Posted by pipeclay

".010 taper over 40mm,not good would matter what hes cutting unless its a bit of hardened bar and the tool is wearing.

Well no, but it would be a lot worse if he was taking 0.1mm doc off 50mm bar close to the chuck then if he was taking 0.5mm doc of 10mm bar 100mm from the chuck.

hi guys i just had another look, Ok a 35mm steel bar sticking no further than 100mm past the chuck jaws. over 75mm the taper is 0.1 mm . no tail stock as support. The steel bar isnt hardened and cuts nicely

as far as the vsd im having trouble with the the muti inputs. ie forward reverse reset and stop. so far i only have the "for" muti control wired up. its wired thru the lathe switch open at stand still and closed when i want the chuck to turn. It may just be a program setting.

Good suggestion about the level Stuart. Ive just been shimming under where the lathe feet would be.
I still have to finish making machine feet for the lathe. The problem with them is the steel i have around the right size. 75mm. Is just to hard. So i thought until the feet are made ill just try and pack the lathe up to level.

I nearly invented a new word then instead of with the i had withe do you think it might catch on?
aaron

Hi Arron,
That taper sounds much better.

For the VSD
The wires from the switch go to DCM and FOR?(according to the manual I'm looking at)
Did you change the parameters on the VSD? PD001=1(according to the manual I'm looking at)

There is nothing wrong with packing, I just find it painful and slow. Now if I had a proper selection of proper steel shim I'm sure things would go a lot faster but I dont.
Do you know what the steel is or did you just pick it up somewhere?

I invent new words all the time, if it wasn't for google and spell check you'd think I was speaking a different language.(I'm pretty sure some still do)

Stuart

Originally Posted by Stustoys

Hi Arron,
That taper sounds much better.

You think so? 0.004" in 3" sounds pretty bad to me.

PDW

Worse than .009 in 1.575"?

Originally Posted by Stustoys

Worse than .009 in 1.575"?

No but still far too much so I doubt that I'd say 'better'. Not as bad, perhaps. My baby Chipmaster is out 0.004 in 10" and that's not acceptable. Definitely not the mounting with this lathe as it's got the kinematic 3 point system.

PDW