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Old 05-04-2014, 05:16 PM   #31
windymiller
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I'm in workshop heaven



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Old 05-04-2014, 05:34 PM   #32
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seat mounting should not be taken lightly, nor should a rat trying to get up your trouser leg doing 50,m,p,h, all of a suden your nUts become more important,
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Old 29-04-2014, 06:21 AM   #33
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Right, the novelty of the Tig has worn off and I've had a major tidy up in the garage, so now its time to crack on with the lathe.

I made some brackets to support the second shaft.


These now hold the shaft in place. This shaft drives the headstock via the orange belt:


There's no keyways yet as i need to see where all the pulleys will sit first.

Next job is to mount the motor and first shaft assembly. I'm going to mount this on a big hinge - in theory gravity and the weight of the assembly will maintain tension in the belt and allow the speeds to be changed easily.

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Old 29-04-2014, 08:50 AM   #34
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On my Atlas the motor plate is mounted on and elliptical cam - so you just move a lever to tighten or loosen the drive belt.

Looks like a fairly hefty lump of motor, so the weight of it pulling should tension it all OK, if it does not you could always put some form of tensioning strap on it to pull things a little tighter.

Great work ... love the tigging.
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Old 29-04-2014, 09:12 AM   #35
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Have you got any pics of the cam arrangement? I went to a local engineering firm and had a look at one of their lathes. It was gravity tensioned but it had a thinner, longer belt. Mine might be too short and fat to work but I'll give it a try.

The welds in the first pic above were done with my Mig. I did the corners seen on the right in the second pic with the tig. I'm using Argoshield at the minute which is not ideal and is munching the tungsten so I need to get some pure argon sorted
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Old 03-05-2014, 05:07 PM   #36
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I'm limited to boc gas here but they do a cheaper deal for hobbiest welders. Look up volkszone deal, or ring up a guy at boc call stu on 01619306029.

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Old 04-05-2014, 09:52 PM   #37
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I've got the BOC price list here:



My local distributor weren't the most useful in the past so I'll try your contact. Hobbyweld do it for 60 deposit plus 50 for the gas. Thats a one off deposit, not annual rent like BOC charge.



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Old 05-05-2014, 07:55 PM   #38
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I've been busy in the shed today. Here's a hinge plate I made to mount the motor and first shaft:



I used a 10mm rod with a nut welded to the end as a hinge pin. The other end gets a wonky thread:



Here it is ready to go:



Next job was mount the hinge plate to the lathe using the exsisting holes:



And here's the whole lot in place and ready to fire up:



I need a slightly shorter belt from the motor to first shaft, but it works! Except it ran backwards Motor out and I reversed the field winding wires and now it works properly!!!

I've had a quick play with the one knackered tool that I have and managed to make a round thing

Sadly, the motor seems to lack balls to start in the higher speeds so I'll give a new capacitor a try, failing that - 3 phase motor and inverter.

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Old 20-07-2014, 06:20 PM   #39
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My mate has been stripping some cheese making machinery for scrap so I salvaged some bits:



Thats a 3 phase motor and variable speed drive

Here're the panels I made for the knobs and buttons:



Wiring done and motor spinning nicely:



All I need now is a 24mm bore pulley for the motor.

I've also been playing about with Arduino:



This circuit will read a 0-5v speed signal from the drive and convert it to RPM, then display it on the lcd.
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Old 20-07-2014, 09:36 PM   #40
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Thats slightly good fortune .. now mind and hook up that earth(and the input earth which i cant see), i fitted a 3 phase lift i bought second hand recently and discovered the previous owner had raspberryed about with the wiring in the motor and one phase was touching the case. luckily i had the earths wired and the good sence to fit a good quality contacter with protection. would have been a nice "supprise" next time i touched the ramp otherwise
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Old 20-07-2014, 09:45 PM   #41
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Lol, I knew someone would comment on that! Its going on one of the inverter mounting bolts. There's no connection for an earth on the inverter, but I've connected the incoming earth to the chassis in the power switch box. There's no protection other than the 13A fuse in the plug, but I now have a selection of overloads I can use. And a Mitsubishi plc, small ac and dc motors, sensors, relays, gearboxes, chains, sprockets etc etc. Can't believe he was going to throw it all in a skip!
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Old 24-07-2014, 05:19 PM   #42
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Quote:
Originally Posted by windymiller View Post
All I need now is a 24mm bore pulley for the motor.
If only you know someone with a lathe who could make one.
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Old 24-07-2014, 09:44 PM   #43
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Funny you should say that. The motor has burnt out on my dads lathe, so he's waiting for me to sort mine so I can machine his pulley to fit his new motor. Still, good things come to those who wait:



Just got mine up and running properly with the variable speed drive and I'm well chuffed
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