Cam And Follower Engine

[Josefa Palsgrove]

Theother issue is that if I try to render the sequence, the follower does not work and does not make my materials change the way I set it when playing in realtime. I can always record the sequence in realtime, but it would be great to have the option to render it offline.

My recommendation is to update to the latest version. In 4.18 we introduced an actual Envelope Follower Event on the Audio Component, so you just need an Audio Component, and if you look at the Events available for it, there is now one for outputting float amplitude values.

This week, I want to share my process for analyzing Twitter. Specifically, I want to find who all of my friends follow on Twitter that I don't currently follow. Essentially, I want to build a Twitter follower recommendation engine.

However, the second category of people, the interesting ones out there on the internet, is almost limitless. The problem is finding them in a virtual sea of bots, marketing-only accounts, and complainers.

Twitter does have a "Who to Follow" page, and while I'm sure it has some great suggestions, I don't necessarily trust all of Twitter's recommendations. It's kind of like trusting a site like Yelp for restaurant reviews when the local McDonalds rates better than your favorite burger place. I'm sure that particular McDonalds is beautiful by fast food standards, but I'm looking for more personalized recommendations.

To start, I needed a list of the people I follow on Twitter, and then a list of who they follow. The proper way to do this is to use the official Twitter API, so I wrote some Python code to do exactly that. Twitter calls the people you follow "Friends", which is funny since I usually don't consider one-way relationships friendships.

I won't go through the code in detail (you can download it from GitHub if you'd like to do that) but essentially it uses the friends/list endpoint to download all of my Friends. I then went through each of those Friends and found all of their Friends.

As a quick side note, the Twitter API is terrible. Using it is fine, but the rate limiting is horrendous. I was basically capped at downloading 12,000 people per hour, which meant it took about a day to download all of the data I needed.

Once I had the data downloaded, it was time to find relationships between my friends and the people they follow. For this, I decided to use an open source Python library called NetworkX. NetworkX helps perform complex network analysis, which is perfect for what I was trying to do.

NetworkX uses a graph structure to help with its analysis. A graph is made up of of nodes and edges. In our case, the Twitter users are our nodes, and our edges are the relationships. The first thing I did was load all of the people I follow and created a directional edge (aka. an arrow) to indicate the one-way relationship from me to them. Next, I looped over all of those people's friends, adding additional nodes and edges.

At this point, my graph had 125,000 nodes which was way too many to draw quickly on my computer, and way too many to model with Lego minifigs. I figured not ALL of this data would be useful and I needed a way to filter it.

Next, I decided to keep only the top 50 most followed people in that second tier of Twitter users. This would limit the processing needed while still giving me a list of the most followed Twitter users that my friends follow that I don't currently follow. Once again, all of this code is available on my GitHub.

At this point, I was able to use NetworkX's drawing capabilities to beautifully render the network of users and relationships. Sure, I could have just listed out the top users that I don't follow, but there is something special about being able to create a visual network of those relationships.

So that's it. It was fun using a graph library to find new people to follow on Twitter using the people I currently follow as a proxy for finding relevant users instead of Twitter's black box algorithms.

Whether or not this presents a problem for you will depend on your engine type. The requirement for a specific cam break-in procedure is really critical for the a flat tappet style of lifter. If you're running a roller cam then the sliding friction between the cam and tappet is eliminated and hence the break-in procedure is not so critical. The recommended break-in procedure is designed to ensure the rpm is high enough to maintain adequate lubrication of the cam to tappet interface thanks to oil splash from the crank.

I spend most of my time assembling double overhead cam engines with roller rocker or finger follower valve actuation where this really isn't a consideration. That aside, the procedure for break-in that I discuss in the course is still applicable. Note that I recommend applying load as soon as possible and using a modest amount of rpm initially. The cam doesn't really care about the load but it's the rpm that's important from a lubrication perspective. By using a modest amount of load and 2000-3000 rpm for the first 15-20 minutes, this will aid your engine and cam break-in simultaneously. Make sure that during this time you vary both the rpm and the engine load.

While I'm always incredibly careful with my engine break-in and have used the same techniques religiously for the last 15 years, the reality is that with modern rings and modern honing techniques it's getting pretty difficult to end up with your rings not bedding. It's certainly less critical than it was a few decades back.

Referring to the use of the word "initially", does this mean apply load immediately upon first start or apply load after the engine has reached operating temperature? If the recommendation is to apply load once the engine has reached operating temperature, then the next question is: how do I reach operating temperature? With a normal idle or a fast idle or a fast varying idle? In my particular case, my engine has a flat tappet cam profile.

For the pushrod*, flat tappet/follower, the single most important part is the splash lubrication, and making sure there is a very liberal coating of the manufacturer's cam' lube or some other anti-scuff lubricant on it - not forgetting the cam' gear* that drives the distributor and oil pump, if used.

If need be, just run the engine at 2k+ no-load for the 20 minutes, while running through the basic checks for oil pressure, leaks, strange noises, etc. After that there's plenty of time to start loading the engine as part of the ring break in and tuning.

[edit] Forgot, for (D)OHC engines it isn't that significant a concern as most will use some form of pressurised feed directly to the lobe-follower interface. Some don't, though, and if they use splash the same practice would be expected to be used.

It's not uncommon to just run the inner spring(s) for the initial cam' break in when heavy springs are to be used (damn good practice, actually) and then the lift is checked for possible lobe failure before the actual springs being used are fitted.

I built a DOHC engine recently, that required this type of cam break-in. I did a lot of reading up on it first, to make sure I knew what i was doing. I like to understand the theory and the mechanics behind what I'm doing, as opposed to just blindly following instructions.

and Secondly, when the engine is moving slowly at idle, there is lots of time for the slow moving cams to displace the oil and break through the oil film between the cam lobe and the bucket. Which would result in direct metal on metal contact and can ruin a set of new cams and buckets very quickly. But at the higher rpm, the oil doesn't have enough time to get pushed out of the way, so it is able to act more like a fluid bearing. Think kind of like a non-Newtonian fluid at higher rpm.

When the cams/buckets are broken in properly, you should see a nice clean and obvious circular pattern on the top of the cam buckets. If there is no clear circular pattern on the bucket, it'll probably look like the lobe is just pushing straight against it, that means the bucket is not spinning. Which means the bucket and the lobe are just grinding against each other, and will completely fail at some point soon.

A roller-type cam follower is a mechanical component used in engines to convert rotary motion into linear motion. It is composed of a cylindrical roller that follows the contour of a camshaft, allowing for smooth movement and reduced friction. As the camshaft rotates, the roller moves along its surface, transferring motion to other engine components.

There are several advantages to using a roller-type cam follower in an engine. Firstly, it reduces friction between the camshaft and other engine parts, resulting in improved efficiency and reduced wear and tear. Additionally, the use of rollers allows for smoother and more precise movement, leading to better engine performance.

A roller-type cam follower differs from other types such as flat and mushroom followers in its design and function. While flat and mushroom followers have a larger contact area with the camshaft, resulting in more friction and wear, roller followers have a smaller contact area and rolling motion, reducing friction and improving efficiency.

Yes, roller-type cam followers can be used in a variety of engines, including diesel, gasoline, and even high-performance racing engines. They are a popular choice in many industries due to their efficiency and durability.

While there are several advantages to using roller-type cam followers, there are also some potential drawbacks. The main disadvantage is the higher cost compared to other types of cam followers. Additionally, they may require more frequent maintenance and replacement due to the wear on the cylindrical rollers.

When it comes to transforming rotary and vibration motion into linear, there's rarely a better and more appropriate mechanism than a cam and cam follower assembly. Cam and cam follower mechanisms are often used in mechanical engineering and various machinery, like internal combustion engines, automatic lathe machines, diesel fuel pumps, and other repeating machinery and manufacturing applications.

3a8082e126