Author Topic: Raynerdís Cowells 90 ME Lathe ... Episode 2  (Read 1631 times)

Offline craynerd

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Raynerdís Cowells 90 ME Lathe ... Episode 2
« on: June 24, 2018, 12:12:11 AM »
There seems to be quite a few with Cowells lathes on here and back in 2013 I also had a Cowells, but due to families, kids and moving home, I had to sell it. Thread here: http://www.modelenginemaker.com/index.php/topic,1250.0/topicseen.html

Anyway, I posted a few weeks back looking for a Cowells again as I really missed it for watch and clock work. I had a few return emails and ended up picking up this real stunner with loads of accessories, including the pinion and wheel cutter an Dividing head. This is absolutely a keeper forever!

I am chuffed to bits with it and put together a short video showing it all!


Iím just in the process of making a spindle indexing unit and then I can use wheel and pinion cutter. Iíll post that when Iíve made it.

Thanks for watching.
Chris

Offline b.lindsey

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Re: Raynerdís Cowells 90 ME Lathe ... Episode 2
« Reply #1 on: June 24, 2018, 01:05:22 AM »
You hit the jackpot Chris. That looks like just about every accessory made for the ME90. And they all look in pristeen condition too. Very nice score !!!!!!!!!

Bill

Offline craynerd

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Re: Raynerdís Cowells 90 ME Lathe ... Episode 2
« Reply #2 on: June 24, 2018, 07:49:49 AM »
Thanks Bill. Are you enjoying using your Cowells?

Chris

Offline b.lindsey

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Re: Raynerdís Cowells 90 ME Lathe ... Episode 2
« Reply #3 on: June 24, 2018, 01:07:00 PM »
I am Chris, but will even moreso once I have a permanent home for it. The DRO has made a huge difference as well.

Bill

Offline craynerd

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Re: Raynerdís Cowells 90 ME Lathe ... Episode 2
« Reply #4 on: July 06, 2018, 12:31:31 AM »
I have considered a DRO but Iíve not made my mind up totally yet.

Chris

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Re: Raynerdís Cowells 90 ME Lathe ... Episode 2
« Reply #5 on: July 06, 2018, 12:39:03 AM »
Im interested in your DRO's as well.   The Aciera will be screaming for one I'm sure!

Dave
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Offline b.lindsey

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Re: Raynerdís Cowells 90 ME Lathe ... Episode 2
« Reply #6 on: July 06, 2018, 01:12:46 AM »
Dave, not sure these will be long enough for your application, but the igaging scales do come in up to 24" as I recall. So far I have happy with them and their economy. The write up on the cowells DRO addition is here

http://www.modelenginemaker.com/index.php/topic,7177.0.html

Bill

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Re: Raynerdís Cowells 90 ME Lathe ... Episode 2
« Reply #7 on: July 06, 2018, 01:26:33 AM »
Dave, not sure these will be long enough for your application, but the igaging scales do come in up to 24" as I recall. So far I have happy with them and their economy. The write up on the cowells DRO addition is here

http://www.modelenginemaker.com/index.php/topic,7177.0.html

Bill

Travels on the Aciera are like 100mm x 150mm x 75mm...   It's tiny.
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Offline b.lindsey

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Re: Raynerdís Cowells 90 ME Lathe ... Episode 2
« Reply #8 on: July 06, 2018, 01:46:40 AM »
Well 8" or 12" scales should be about right then. They can be cut shorter if needed, but haven't tried that myself. I didn't realize it was that small.

Bill

Offline mikemill

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« Last Edit: July 06, 2018, 11:58:53 AM by mikemill »

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Re: Raynerdís Cowells 90 ME Lathe ... Episode 2
« Reply #10 on: July 06, 2018, 12:41:56 PM »
ThNks Mike!
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Offline craynerd

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Re: Raynerdís Cowells 90 ME Lathe ... Episode 2
« Reply #11 on: July 15, 2018, 10:12:47 PM »
Evening, I have been very excited to use my Cowells wheel and pinion cutter and spending the last few weeks sorting out the spindle dividing method, Iíve come across two significant problems. I believe this must be an older model of their spindle cutter because it is branded Cowells, yet doesnít seem to be the same as other wheel and pinion cutters on the internet. That said, there are not many sources of information!

I have two big problems for wheel and pinion cutting. I can resolve them both with some fiddling and major reorganising but I wanted to check if I was missing something and being stupid!

1. The centre spindle head is threaded m14 x1.5 like the lathe head. Consequently, adding the collet holder extends the spindle length another 25mm+. This means even with a short holding arbour, the cutter comes too far past centre even when mounted at the end of the cross slide table! Is there any other way of mounting a cutter arbour in the spindle or is my spindle not designed for this? If not, Iím going to have to make an extension to the table of about 25mm.

2. Simple one but the motor is going the wrong way and spinning counter clockwise. I appreciate I could simply mount the whole thing the other way around but this would then cause the main casting to foul the normal lathe motor pully. Is there a simple way to reverse the motor?










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Re: Raynerdís Cowells 90 ME Lathe ... Episode 2
« Reply #12 on: July 15, 2018, 10:51:33 PM »
Does the spindle have a internal taper?

If so coming up with a cutter arbor would be your easiest solution....check it for #0 or #1 morse.

Dave
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Re: Raynerdís Cowells 90 ME Lathe ... Episode 2
« Reply #13 on: July 15, 2018, 10:53:34 PM »
If it does have a morse taper inside it, then an arbor will be possible, but you really will need a draw bar to hold it in.

Sherline makes #1 morse taper arbors....with 1/4-20 female threaded holse for a draw bar.

You will need to make a hole in the sheet metal guard to get the draw bar in.


Dave

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Offline b.lindsey

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Re: Raynerdís Cowells 90 ME Lathe ... Episode 2
« Reply #14 on: July 15, 2018, 11:27:40 PM »
Chris, you might contact Collin at Cowells also and see if he has and ideas or recognizes the vintage of the pinion cutter.

Bill

Offline craynerd

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Re: Raynerdís Cowells 90 ME Lathe ... Episode 2
« Reply #15 on: July 17, 2018, 11:24:04 PM »
Thank you everyone. Iíve sourced an 0 MT arbour with a draw bar. Iíll let you know how it goes.
Second question:

Iíve got a D.C. electric motor. Itís old, probably 30 years. Iím not totally familiar with motors but after some research, and a picture below, Iíll try and explain what I have inside. So when the rotor is out, Iíve got the magnets and what looks like a wound stator (googling has suggested that!) that is wrapped. These are two semi circles and a wire coming out of each. Two wires going to each of the brushes and one going to live and one to common.

I appreciate that I clearly havenít a clue what I am talking about I should be capable of editing the configuration if I know what I have to do. In an ideal world, Iíd add a switch to flip the rotation but Iím already getting ahead of myself.

Is there any way to change the direction of rotation?



Cheers
Chris