Member postings for Ron Laden

LOL, no I am considering using just ordinary everyday brush type can motors and the vehicle is a class 22 diesel loco.. As mentioned they are 12 to 24 volt and they are ok at 24 volt but the manufacturer recommends keeping the amperage below 20 amps so I was thinking 15 amps to be safe. At 12 volt the amperage is listed at 12 amps and the rpm at 2400, the reason I want to go with the higher voltage is it will increase the rpm and that helps with the gearing. With 2400 rpm I wont be able to achieve the desired gearing, it would be ok once running but it would be too high for starting up.

John, the 0-4-0 is all sorted thank goodness, 4 motor,s again but they were easy.

Edited By Ron Laden on 11/08/2018 11:46:10

Thanks Robin I do appreciate that but wonder what full power will deliver to the motors, though you are not constantly at full power. 

There is a simple answer to all of this.

I can buy a 120 amp controller with adjustable amps but it is over £200 which I was trying to avoid but if needs must I will have to go with that. I am ok with basic electrics but not with electronics and not knowing I was hoping there was a way of controlling or restricting the current after the controller but if not I will have to consider the adjustable controller.

Regards

Ron

Edited By Ron Laden on 11/08/2018 10:54:21

No I dont want to limit the torque but I would have thought at 24 volts and 15 amps the torque would be ok but I could be wrong.

With a 100 amp controller and say a 60 amp fuse, wouldnt the fuse blow each time the controller was switched to maximum, thats why I was hoping the max amps could be set or controlled.

Thinking a bit more about it, it would probably be simpler to go with 24 volt and safeguard the motors by having a limit on the current.

Les, I cant provide full details of the controller, all I know is that it is rated at 12 to 36 volts and 100 amps maximum. I wasnt thinking of modifying the controller but wondering if I can control the amps at the output.

The 4 motors would each be driving a loco axle through the same gearing so the torque should be similar to each motor.

Ron

Hi Robin, I have just added to my post

Ron

Morning guys,

I am looking at a new project at the moment and I have a couple of questions.

If I have a 24 volt supply (2 x 12V - 75 amp batteries in series) and a non adjustable 100 amp motor controller is it possible to reduce the output voltage and amps from the controller.

Ideally I would want the voltage to be 18 volts and have the amps adjustable or if its simpler set to a maximum of 60 amps.

Also am I correct in thinking that if I have 4 motors wired in parallel from the controller they share the current, so at 60 amps each motor would see 15 amps..?

Many thanks

Ron

p.s. I forgot to say that the motors are rated at 12 to 24 volts and having spoken to the manufacturer a lot of people run them at 24 volts but you have to reduce the available current to under 20 amps so I am thinking 15 amps to be safe. I know if you double the voltage to a motor the speed doubles, the motors are rated at 2400 rpm so 4800 on 24 volt. If I go with 18 volts I am assuming the rpm would increase by 50% to 3600 or isnt it that simple.

Edited By Ron Laden on 11/08/2018 09:14:13

Edited By Ron Laden on 11/08/2018 09:32:29

I am about to start building the loco body and as mentioned I am going with a Class 08..ish style body. The 08 is of course a 0-6-0 loco but there was a prototype built as a 0-4-0........well thats my story and I,m sticking to it.

I was going with a typical green BR body but I found a few other colours for the 08 and I rather like the grey version in the picture below it is a bit different. I may well go for it when it comes to the painting and finishing stage.

Edited By Ron Laden on 10/08/2018 16:55:07

Hi John,

I wonder if Poly Models (Bruce Engineering} could tell you.

Tel: 0115 9736700.

Ron

Well at the risk of seeming more stupid than I am, I will own up and say I found the make and model number of the saw. In my defence, when I carried the saw from the shed to the bench the label was facing away from me and as soon as I put the saw on the bench I opened the hinged cover, again away from me. This morning I closed the cover and there was the make and model number label as clear as day.

Anyway, surprise, surprise I have found the tyres and a new toothed drive belt on line from Solent Tools. The make is NuTool and model number HBS9-4, as soon as I googled the make and model quite a few links came up.

I still have the rubber sheet on the way but I can hold on to that for future use should I need it.

So happy I have found the correct tyres and a new drive belt but feeling a bit of an idiot for not looking for the makers label which was in an obvious place.

Thanks for all your help though guys, much appreciated.

Ron

Hi Murray, my machine is fitted with alu wheels and as you can see ran on tyres.

Ron

Thanks Andrew for the explanation.

You will probably have gathered that when I start out with a mini mill I will be in the mouse camp..lol

Ron

Thanks Rex,

I have just spoken to Axminster but they cant help, they have a belt which is the right size but it is a "T" shaped belt and mine are flat.

So I have just ordered some solid neoprene rubber strip from ebay and will give it a go at making my own. The strip I have ordered is reinforced with cotton and sounds quite hard wearing so hopefully it will do the job.

Ron

Now I dont know the first thing about mills or milling but I will be buying a mini mill in the future. I am quite prepared to be shot down in flames but is it right that a cutting tool is glowing red hot, my feeling is thats it not but what do I know..?

I can appreciate the need to want to remove as much material as possible and speed up the job but at what point do you decide that the DOC and WOC and feed is just too much. Andrew you say "so what" to "the smaller machines aren,t that rigid" but surely pushing a machine that hard cant be doing it any good in the long term.

As I mentioned I,m quite prepared to be corrected.

Thanks Michael, I think making my own tyres is probably the way to go

Ron

If you have seen the film Master and Commander, remember the scene with the ships surgeon using one of these tools to cut a disc out of an injured deck hands skull. The shipwright was sitting close by and filing a silver coin to fit and plug the hole....a good film worth watching if you havnt seen it.

Edited By Ron Laden on 06/08/2018 20:47:58

Thanks Bill

Well that sounds like a good way of doing it, which obviously works.

No I am a fair way from Buxton, based in North Devon.

Ron

Thanks guys, I have found a few leads that may help, will have a phone around tomorrow.

It seems that the tyres are made of Urethane and from what I,ve seen so far they are not cheap, depending on size, £50 or more for a pair of tyres....?

Will see what tomorrow brings but I may be buying some rubber strip and making my own.

The tyres I am looking for are 233 mm dia x 12 mm wide x 2,5mm thick.

cheers

Ron

Edited By Ron Laden on 06/08/2018 20:08:29

Edited By Ron Laden on 06/08/2018 20:08:48

Hi guys,

A picture below of whats left of the drive wheel tyres on my cheapie brand bandsaw. I dug it out of the shed this morning in whats probably 10 years since it saw the light of day. The saw is in very good condition considering the time its been hidden away but as you can see the wheel tyres have dried up and completely perished.

I have no idea of the make of the saw but it is probably Chinese or Indian. I know there are suppliers where you can get various sizes of blade but wondered if anyone knows if its possible to get hold of other spares and if so from where..?

Thanks

Ron

Edited By Ron Laden on 06/08/2018 14:59:06

Edited By Ron Laden on 06/08/2018 15:00:04

Hi Jeff,

Why didnt I think of that..? Thats a great idea, a body for the girls and one for me when I want to be a bit more serious about it.

Thanks Jeff

Ron

Difficult to answer, I dont know about the "most beautiful" but something that completely took my breath away was Michelangelo,s sculpture of David.

I was working in Florence a few years back and I went to see it and just couldnt believe what I was seeing. It is 17 feet tall and the detail is beyond belief and to consider this was carved from the solid with hammers and chisels over 500 years ago. I stood looking at it and my mind wouldnt stop thinking how could a man do this..?

I know Michelangelo was considered a true genius and when you stand in front of the sculpture of David there is no doubting that to be true.