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jeff_p

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  • Location
    East Sussex
  • Interests
    Building an 00 gauge '20s early '30s Southern Railway model railway.

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  1. ... and had already confirmed a modest case of "stepping over a line", there's been some additional work going on. I give you a DCC Generator that supports multiple Power DCC Districts. OK. Stunned silence from most of the audience, and I would imagine for 95% of those people using DCC out there this means little to nothing and even if it did has little to no practical use. Question: What is a DCC Power District? Answer: As I understand it it's a mechanism for subdividing up a layout is separate areas such that if there is a "power event" within
  2. It's an open source (and hardware) alternative to buying a DCC Controller system from the likes of Hornby or Gaugemaster (other manufacturers are available). To be fair this box is only half of the solution. If you use this (here: https://github.com/GreyLimit/DCCGenerator ) in limited DCC++ emulation (or indeed just build yourself a DCC++ solution, see here: https://github.com/DccPlusPlus ) and use the JMRI software on a PC then you don't need to buy a commercial solution to operate DCC models and accessories on you layout. I've also been writing an alternative to JMRI (which I c
  3. There's no doubt that I have crossed some form of line. None what so ever... I give you, "Yet another persons home grown DCC generator" (thingie): What is it? It's effectively an alternative to the DCC++ Arduino and Motor shield solution for driving your DCC trains. It is all fresh code which has it's own selection of pro's and con's, but I am chuffed with the LCD giving a second by second summary of what is going on (as far as the Arduino can tell). The "Lnnnn" gives the value returned by the Motor Shield for the power/load passin
  4. David, You're absolutely right. All the pictures of work shops I can see (on google) have lathes and other machines with the belts heading straight up but the limited number of pillar drills all had an intermediate shaft on the ground behind the pillar. So far it would seem that pillar drills are the only machine I've noticed like this, but I would guess that any machine driven "from the top", like the drill, would have used a similar mechanism. Live and learn, hopefully. Jeff.
  5. A thought just crossed my mind. I would have assumed that the pillar drill in the photo has been adapted to be operated by the floor mounted electric motor (right where all the swarf would be heading). Would it not have originally been driven from an overhead power shaft (can't think of the proper name at the moment). Should I have kept the thought to myself? One way or another, that cannot take anything away from the results though; Just awesome. Jeff/
  6. After a wee comment from one of the local club members, I've been "refining" the servo motor code for the Arduino, thus: Bouncing servo motor Refining isn't perhaps accurate, more of a complete over haul.
  7. So, given that I've been playing with servos it seems that producing something simple to drive them would be a good idea. If you are of a mind, and fancy a modest challenge, then over HERE (in Github) is the source for the Arduino firmware. This, after relatively limited testing, should work on a Nano, Uno or Mega2560 and control as many servos and the board has PWM outputs (with some reasonable exceptions). Here (and arguably meaninglessly) is a picture of an Uno operating a single servo: What this *has* shown (and provided justification for writing the
  8. Just a quick one. "Can I arrange to put the switches on the actuator" was, I think, the last question. Yes: and So there are "T Slots" in the chassis into which rather small M1.6 bolts fit and M2.0 might fit (I haven't any to try). I would hardly say that it is simple, but it is achievable. Attached are the STL files for the chassis, the rod and two wheels (one with 10mm throw and the other with 4mm throw). Please feel free to play though I would warn that I am new to this CAD for 3D printing act
  9. Hi Stu, I have looked at the MERG servo mounts, and thought they were a bit fiddly, especially the "pin" moving between the goal posts. The wheel I've modelled screws in-place of the arm normally found on a servo so it feels more rigid and secure. It's also put the loads closer to the motor so the twisting forces are reduced. To be honest I couldn't quite see how I was going to fit the pin to the arm reliably. On the subject of the built-in point springs, I would remove them. They're essential for the electro-magnet point motors, otherwise the blades would not remai
  10. Should I have said "Hi" in here? I'll keep in brief: Hi. I'm Jeff and I have a problem ... hang on, that's the other group Seriously now. The wife and I have been living in the Uckfield area for a few years now, and a couple of years ago thought "shall we try to build a model railway?" and that's when the trouble started. Since then I've been trying to combine every possible interest I have with that objective so, naturally, progress has been unpredictable. Her interest? Anything other than that which I am interested in. My interest? South
  11. Estimated cost per switch is a little tricky. The servos are really cheap at about £1.15 each off ebay, and a really cheap arduino to run it is about £3.50 but can control a number of servos. 3D printing is cheap but the printer isn't, unless you've a friend with one. How you make it all hang together and operate is really the question, to which there are many approaches, mine being just one (and technically far from the simplest). Could the switches be incorporated into the servo unit? Yes. The mount for the servo has been deliberately centrally located meaning the switches cou
  12. Well, I guess I ought to have known that I would end up doing this, so, yes, wheel re-invention was the order of the day. Putting that to one side I think I have come up with something a little different, perhaps more flexible while being simpler to print and deploy (though that last point really will have to wait until I have actually installed one and got it working). I have chosen to divide the whole "model railway point motor" thing into two distinct parts: The component which interfaces to the point itself, and the component which provides the driving force to act
  13. So here we are, again, in more than one way. It's been an interesting summer with the easing of lock down and some fine weather, but changes are afoot (on both fronts). So things have slowed a little on the layout, but mostly because the work on the Arduino concept has been trundelling (?) on with progress on both the hardware and software fronts. The hardware is migrating off the bread boards onto something that can be attached to a layout and the software is becoming more flexible and forgiving. It's almost working. I'm reaching the point where I actua
  14. I believe my last words were "I need to focus", and in a sense I have, just not on what I thought I should be. The trouble with "playing with DCC control" is that once I had a proof of concept working with trains and points moving smoothly under my control I realised what was missing. The result has been (and encouraged by the management) that I've re-written virtually everything but "properly" this time. But that's not all, oh no. Looking forwards towards a more automated layout (and freshly encouraged by my successes with the tiny Arduino boards) I thought to pull t
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