Search results

To quote Crocodile Dundee - "Now THAT's a knoife!"

George: I'd keep after them, these guys are kinda like Microsoft - they don't call you, you have to call them. And if you don't get the answer you're looking for, ask to talk to their supervisor. If you don't get satisfaction right away, keep calling them. You're not asking a silly...

Martynb1: As of October of last year when I got my set of files from George, the procedure was to PM gbritnell about them. The files aren't free, but considering the amount of work that George put into developing them, they are VERY reasonable. Don

Were you able to determine from this run if the fuel tank you built will be big enough? Nice engine. Nice tank. Nice run - even if it was only running on 4 out of 5. If it's a DC motor that you use for starting, could you use the motor as a generator to put a load on the engine when you get it...

I re-printed the enclosure, I even got a white paint-pen and painted the top of the text so that it stands out a little more. Some numbskull forgot to scale the print up to 103%, so I had to "adjust" the fit of the cover. Other than that, everything worked out OK. I used the drill press a...

I've already got an rpm display on the servo, but it only displays in 100's of rpm. The tach will let me determine whether I'm varying the speed set point in 100rpm increments, or just displaying to the closest 100rpm. If I set the speed and it's displaying 1700rpm, but I'm reading 1725rpm on...

RM-MN: I have been threatening to get a tach for a while now. I'll probably get an optical tach, but one that gives me the option also getting a linear speed. It looks like they can be had for around $50-$60 for a budget model. Don

Houston... We no longer have a problem. I got my 1K pot, and it actually was a 1K pot. I built a fresh board using the circuit with the run stop switch from the hobby machinist link that I sorta provided. It works as advertised, I've now got a variable speed motor that I can set the speed...

I built that board 2 times yesterday. The 1st time using the board that I thought would work better - it didn't. As long as you didn't modify the traces on the board it was OK, the traces were arranged in parallel strips with 5 holes in each section. I needed to split 2 of the traces into 2...

Soldering PC boards is kind of a balancing act. You want enough heat to be to get the joint to temperature quickly enough that you don't damage the electronic components, but you don't want so much heat that you cause the copper foil to delaminate from the board. My soldering pencil is...

OK, last night I sorted enough resistors to be able to try putting together my perf-board comglomeration... It didn't work, the board that is, I wasn't getting ANY voltage from the wiper of the pot. That I think is due to a couple of problems, I think I screwed up the switch while trying to...

That's kinda' what I was thinking. But now I'm not so sure about the 1.0, 1.2, 1.5, 2.2, 3.3, 3.9, 4.7....etc., etc., ohm resistors. I've got a feeling that the lower end of 1-820 ohm resistor box won't get used very often. But now that I think about it, they MIGHT be useful to get a voltage...

Andy: I used to do that, still do with some stuff, stored parts of my airbrush in one so I wouldn't lose it - now IT's gone walkabout. I got the LEGO boxes because they had 28 compartments in each box. I will eventually get the resistors sorted by ranges, 1 to 82 ohms, 100 to 8.2K ohms, and...

The resistor assortment arrived last Friday. Twenty of each from1 ohm to 1M ohm, that's a LOT of resistors. I found some LEGO parts boxes on-line that will do a bang-up job of keeping them separated - as long as I don't do something stupid like knock the boxes over when they're open, they...

What, no "working" starter Bendix? Oh well - maybe next engine? Still VERY impressive! When's it going to go VROOM-VROOM without you having to supply the sound effects?

Doesn't that leave you with 22500 sparks per minute? You only need 9 sparks per revolution no matter what the rpm is. (9 sparks / rev) * (2500 rev / minute) The rev units drop out and that leaves you with sparks per minute. You had the right number, just your units were wrong. Sorry, my 1st...

I have looked for my electronics parts and am not able to find them, so I ordered a resistor assortment kit. I'm pretty sure that my original parts will magically reappear about a day before the replacements arrive. I believe that Murphy had a corollary covering that probability.

I wonder if when you are heating it with the heat gun you are getting the part soft enough to move, but not holding it at that temperature long enough for the internal stresses to normalize? It's probably more work than you really want to go through, but... I'm wondering if you could "heat...

Conflicting information in a Chinese "manual"? Surely you jest!

Lloyd: I read that that guy. Your investigation of the torque curve was one of the things that convinced me to give the sewing machine servo motor idea a try. I'm going to try it with the rpm's at 1:1-ish first and see if it's got enough "ooomph" for my purposes. If it comes up lacking...