Equipment/LatheMillCombo/Logbook

2012-01-26 by jtreg (James)

Picked up new perspex chuck guard from Hamar Ltd and fitted it to lathe.

2012-01-25 by ms7821

Paddy found a crimp connection in the power supply was loose and has resoldered it. This was a fault that prevented the lathe from working.

jtreg noticed that the chuck guard needs to be replaced, and will do this tomorrow.

2011-09-07 by spooq

Headstock oil changed, ways oiled with proper slideway oil.

Saddle is sticking at tail end of bed, suspect bed needs proper levelling, as this has not yet been done. Will get hold of a machinists level to do this.

2011-09-06 by spooq

The motor on the lathe has been fixed. The centrifugal switch was failing to turn off the starter winding, as it was slipping on the shaft. We pushed it firmly back into position, applied lock-tite and punched some holes in the shaft to stop it moving.

The adapter plate has been machined to fix the 4-jaw chuck. We also confirmed the critical face alignment stays true when it is put on and off the machine, using a DTI. We took a small amount off the outside diameter of the plate for cosmetic purposes, in order that users would not think the plate was rotating asymmetrically.

The circuit of the machine is extremely simple. It consists of a few switches (some are e-stop, one of which reverses polarity on the starter circuit), a contactor plate which is always engaged when the machine is moving, and not much else.

TODO:

* Replacement headstock oil will be arriving tomorrow, not sure when it will be changed.
* A temperature sensor + buzzer combo will be placed on the motor to alert users when it is getting hot.
* We will measure the power draw from the wall.
* Might draw a circuit diagram

2011-08-23 note by spooq

from mailing list:

Hi everyone,

you might have noticed the guts of the 3-in-1 have been hanging out
for a little while. Abby and I have been poking it, trying to figure
out why the lathe motor has been making a nasty noise. We're concerned
this motor will follow in the footsteps of the previous one, and burn
out. We got to do a bit more trouble-shooting today, and we found that
wiring the mill direction control to the lathe motor stops it from
making the noise. We didn't have time to test the opposite
configuration, i.e. lathe direction control on mill motor, however
this would point towards the wiring or control panel, rather than the
motor itself, being the problem.

We still have a couple more test steps to get through before I call
Chester again. I have been in contact with them regularly over the
last week, so we are working with them on getting things fixed.

If there are any electrical engineers who would like to help, please
send me or Abby an email.

Thanks for being patient everyone, I know there are a lot of people
who want to use this machine, myself definitely included.

Cheers,
Luke 

2011-05-28 Operator: Kal

21:00:59 <Kal> the big lathe is making an odd noise...
21:27:23 <Kal> the lathe motor on the 3in1 is making grindy noises, could someone advise?
21:30:49 <Kal> yeah, I have left it alone after checking a few basic yhings 
               like belt tension. I don't think there is a logbook, but I was 
               using it for a good few hours with no problems
21:34:41 <Kal> umm the motor just doesn't sound like it is running smoothly, 
               pretty sure it is something inside the motor

This was the first time I used the
lathe unsupervised so I was extra careful and successfully used it for
a few hours. After a brief pause to look at the workpiece I started it
again and straight away stopped it because of the noise. There really
was no indication that there was a problem before that point....