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Does anyone have any data on the the breakdown voltage of any of the common DLP resins, or links to any data? I have spent several hours searching the internet for information, but all I have found is one special ceramic filled resin with a specification. And at a price of over $300+/500ml I am...

OK. We have a part and need to locate it in the mill by "picking up" (locating the center) of a hole. If the hole is 1/8 inch (3mm) or larger it is no problem using a DTI, but when the hole is too small for this it starts to become e problem. In the past I have used a wiggler and centered it...

I bought an ACRA toolroom lathe almost 20 years ago. The ACRA is a very accurate copy of a Hardinge HLV. If the Hardrige had a 10-32 hole tapped in the ACRA has one there also. It is made by Cyclematic in Taiwan. This means that all Hardinge accessories are bolt on so additional tooling is...

This mod won't improve the precision of a Bridgeport milling machine, but it does eliminate two sources of irritation of operation. Over the last 35 years that I have had my BP I have probably knocked the crank off its axle al least 500 times necessitating picking it up from the floor. The...

First off to set the stage, I started having vision problems about 20 years ago , Today I have been legally blind for about a year and a half. This means that to see any detail I need lots of light, and magnification. I have lots of overhead light and various magnification items. But on the...

Spark plugs always seem too be of interest to the IC crowd so here is another construction thread on my recently finished d production run of plugs. These are threaded 10-40 and are just over an inch long overall. They are similar to the plugs I used in my tinyengines which were detailed at...

I have been using loupes for about 60 years. When I was a young man it was as a aid to building small parts, but now I am legally blind they are a part of my daily life as well as in the shop. Firs t tip. When setting a loupe down ALWAYS place it with the lens up. First reason is for safety...

The Bridgeport 2HP Varispeed head has two small windows with the RPM for the high and low ranges showing through them. The numbers are small but adequate for those with normal vision. On a standard model the windows are about 5-1/2 feet above the floor. I have a CNC version so the windows...

As my eyes continue to deteriorate, legally blind in one and 20/200 in the other, I have been looking for a suitable replacement for my trusty HP calculators. I never found a physical calculator that would suit me. Needed large high contrast display and keys marking.. Also needed to be RPN and...

You Tube link to a nice film on motor cycle manufacturing in the early 20th century, Starts with casting the engine cylinder and then shows boring the cylinder and crankcase parts. Goes on to the assembly of the engine and the rest of the motorcycle. Gail in NM https://youtu.be/6m8PmMQK76s

By way of background for this project, every year for the last 20 years or so a group of us with r famil memembers get tgather in the mountains east of Sllt Lake, UT, USA to play trains and have fun. This is known as the Poison Creek Steamup. The leader of this pack and track owner has a...

A real simple mod. I slide the vice to the edge of the drill press table, load part and then start to slide the vice to center of table to drill. What happens? If the handle on the vice is anywhere near vertical it drops down and catches on the end of the table. No big deal if I am just doing...

Here is a good link to slow motion videos of metal cutting operations. All with inserts by Ingersoll Cutting Tools carbide and cermet tools. Turning, Milling and drilling operations in steel. Link is to the beginning of a playlist of at least 25 videos of different operations. As each 1 to 3...

In our hobby we all have to oil things. For those who build bigger engines a pump oil can is often sufficient for most needs. For those of us who build smaller toys small precision oiling devices are desirable. Four ounce oil cans of 3 in 1 or Starrett oils are often used as are syringes...

I have been using a CDI ignition systems from S/S Machine & Engineering LLC for a long time now. I have used about a dozen of them and my active stable has 3 Gauge1 locomotives and 3 stationary engines in it. http://www.cncengines.com/ic.html I have been using standard batteries...

My friend Jim, who lives a couple of states over, and I have been building Gauge 1 Locomotives and other powered Gauge 1 items together for about 20 years. Between us we we have built a dozen or so Locomotives plus 6 ditchers (self powered steam powered steam shovels) plus many modification...

A few years ago there was a flurry of interest about the Ducati Elenore V8 motorcycle. A V8/lnline 4 patent drawing was released by the inventor of the engine. To my knowledge there were only two prototypes built. One a V8 of about 860 cc displacement and one an In-line 4 of 125 cc...

"Speed Scotty. We need more speed." Or something like that from Star Trek. As any one with macular degeneration knows the cry is really for more light. Like many of us, I started out with a 60 watt incandescent bulb in a swing arm fixture to light the cutting tool area of my machine tools...

Drill stands are very handy but can be a pain to use. I did a thread about 5 years ago on improving readability. And it made a big improvement in ease of use. http://www.homemodelenginemachinist.com/f34/improving-readability-drill-stand-lettering-2976/ Since then I had a stroke and lost a lot...

One of our members is currently building Elmer's #34, Cross Twin Engine. One of the few places that Elmer ever had a design flaw was in the valve linkage of this engine. The valve link connects two parts rotating through an substantual angle at 90 degrees to each other. With a pin at each end...