Here is a list of all the postings Jens Eirik Skogstad has made in our forums. Click on a thread name to jump to the thread.
Thread: How Accurate Are Low Cost Digital Calliper Micrometers? |
23/04/2012 19:44:14 |
I has digital caliber with imperial both in 1/1000" and fractional imperial (button with mm, 1/1000", fractional imperial). Learned out the fractional imperial measure is not to rely on at the digital caliber. There is a gap in fractional imperial measuring when i compared with 1/1000" in the digital caliber. Better to use 1/1000" or use caliber without electronic digital measure when fractional imperial is used to get exact measure of the product. For each measure, set at zero before use to be sure the measure is correct as possible. Remove dirt from measure jaws before measuring at the product.
Also i am using imperial measure as showed in the drawning while i am working with the Stuart Turner compound steam engine.
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Thread: Myford ML10 with worned bed |
14/04/2012 07:16:54 |
Hi folks! Is it possible to repair the worned bed at the ML10 with the plan grinder? When i moved the main saddle from the area where the saddle is mostly used to tail stock, the saddle is binding. I checked the play in the saddle near main spindle and near tail sock. There is play near spindle and no play near tail stock. Also the parallelism is worned out in the bed. The lathe has been abused by difference car mechanics in the workshop a lot of year before we moved to a new workshop there i am working as car mechanic. And the lathe is sorted as a waste hence i am trying to save the lathe. |
Thread: mercury or quicksilver........Barometer? |
10/04/2012 20:45:21 |
PS, Do not sell, you are responsible for others' health and the environment! |
10/04/2012 20:43:38 |
Take care of your health! Deliver to the recycling center to take care of the dangerous mercury. |
Thread: Stuart Turner Comound steam engine, poor casting of cylinder block. |
05/04/2012 22:45:31 |
Hi.. Since i has not received message here, then i took time to study how it affected the timing in case the width of ports is changed. I learned out the lap must not be changed for inlet port and there is not lap in exhaust port, close both two inlet port in mid of position only. Then i adjusted the ports with milling end pin carefully. The valve blocks need adjusting to close both two of the inlet port in mid of position, the "lap" on inlet port is ok (enough material to right size with milling pin.). Jens Eirik |
02/04/2012 23:45:13 |
Hi folks! I has worked with the cylinder block to final size. But i has a problem: The distance of inlet steam ports is not correct. It will be 5/64" inlet port + 5/64"+5/32" exhaust port + 5/64 + 5/64" inlet port for both high pressure/low pressure cylinders. I measured between outer inlet port and inner inlet port and got results: The outer distance between the two inlet port is 15/32" (correct distance) in both HP/LP and inner inlet port distance is difference both in HP and LP. HP has 37/128" and LP has 9/32", it must be 5/16" in inner distance between the two inlet ports. Is it common the distance is not allways correct due wrong in casting? Is it possible to make a carefull change to correct distance with a microscopic increased inlet port distance and change the distance in the "D" valve to keep correct overlap/keep the inlet ports closed in same time with the "D" valve in the center position? I has not still created the exhaust port in the cylinder block. Some idea and suggestions? |
Thread: Doubt on a Magnetic Stand Square |
01/04/2012 06:08:35 |
A is not to hold the rod B. A is to fineadjusting the DTI and get the pointer at zero before measuring on the workpiece. The rod maybe not right part for the magnetic square stand since it will not fit to the clamp. Edited By Jens Eirik Skogstad on 01/04/2012 06:10:48 |
Thread: Turning / machining Aluminium - Tips |
30/03/2012 05:27:25 |
Posted by _Paul_ on 30/03/2012 01:21:18:
I have'nt seen parraffin anywhere locally for some time now and if I remember when I last bought it it was expensive, I still remember the days of filling up the old "Valor" heater with I as a kid when it was probably only coppers for a gallon. Regards Paul
Paul and all folks, in case paraffin is not available, you can use barbegue grill igniter fluid or lamp oil as lubricant for tools on aluminium. |
Thread: Steam ports |
14/03/2012 06:18:17 |
Eeehh, no possible to run steamengine with one port, you need 2 ports , inled and outled. See the link: http://www.animatedengines.com/oscillatingsteam.html
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Thread: Possible to start up the compound steam engine via R/C? |
11/03/2012 20:52:57 |
Thanks |
11/03/2012 19:15:02 |
With the generally word: will it be possible to use starting valve in the Stuart compound steam engine? |
11/03/2012 15:50:06 |
Hi folks, is it possible to start up the compound steam engine via R/C i steam boat? I can see there is a trouble with the HP cylinder is in TDC or BDC, there is not possible to start up the steam engine. Can i mount the start valve between HP cylinder and LP cylinder to start up the comound steam engine? I can think the LP piston has larger area than HP piston hence the power is greater in LP piston than HP piston and it will start up the steam engine with starting valve while the steam chest in HP cylinder where steam pressure is ready to drive the HP piston as soon the piston is set in action affected by LP piston via crankshaft while the starting valve is activated. |
Thread: Leaking Oil From Myford super7 Plus Big Bore |
27/02/2012 20:40:13 |
There is not wrong with the oil is dripping out of bearing, do not strip the lathe if the bearings is in good condition and well adjusted against play and chattering under use. The lathe has not recycable oil as the industrial lathe with main spindle in the enclosed gearbox with oil. Wipe out oil of the lathe periodical since the oil has drip feed oil container in each bearing for the main spindle. Also there is no oil seals to preventing the oil is dripping out of bearing. The dripping oil container has adjustable valve to control oil consumption, be careful the bearings is not running to hot caused too little oil amounts. Edited By Jens Eirik Skogstad on 27/02/2012 20:42:09 |
Thread: Wheel Cuting thin tooth? |
08/01/2012 14:06:30 |
I has same setup in my lathe each time i am making geat wheel or other work such as hole for cylinder head, turbine wheel and et cetera..
1. rule: No play in the lathe/millinghead!
Check all slides and bearing in the lathe/millinghead are without play with force of hand (move the sliding or bearing in all rights of way) when you are checking the parts in lathe are without play. Check play with dial gauge if neccesary.
Is there chattering/vibration of lathe/millinghead when you are making the gear wheel?
Is the blank wheel/indexing disc firmly secured? (Can not rotate with force by yours hands)
Edited By Jens Eirik Skogstad on 08/01/2012 14:08:29 |
06/01/2012 19:54:30 |
I can see the space between teeth is in correct size before the last teeth is thin, can be caused by wrong sized blank wheel with other wrong calculated gear wheel. The gear wheel with envolvent teeth and gear with cycloidal teeth has difference formula to calculate the correct size of blank wheel. Check again in case you has been overlocked in calculating the gear size. |
06/01/2012 19:41:09 |
Indexing problem can be caused by:
Wrong division in the indexing plate.
Wrong division in the gear wheel.
Loose fitted indexing plate or gearwheel.
Loose fitted indexing arm/pin.
Loose bearing.
Loose worm wheel in the indexinghead/table
Not correct pitch distance in the worm wheel in all places from the beginning to the end of the thread. (very rare)
Also all division must be absolute correct divided both in indexing plate and gear wheel and no play in the indexing head except the clearance can be a bit loose between worm wheel and gear wheel hence never rotate past the hole before return back to the hole and lock there with indexing pin. The bearing will have some resistance when you turn around the shaft in the indexinghead to prevent there is play and no shaking under work. Turn the indexing arm slow until the indexing pin is locked in the indexing plate.
Edited By Jens Eirik Skogstad on 06/01/2012 19:43:37 |
Thread: Hot Air Engines |
01/01/2012 20:29:22 |
When i builded the first stirling engine, i used the piston sealant made of leather lubricated with oil and the packing box for displacerpiston was made of lamp wick with grease. It worked very well. ![]() |
01/01/2012 07:28:40 |
Too high compression? In case too high compression who caused difficult to run hot air engine, set the phase angle at 120 instead 90 degree. The engine must be in low friction and leakfree. Use all ball bearing if possible to replace from plain bearing to ball bearing in your engine.
You wrote:
"the hot end fins became too hot to handle." Wrong material in displacer piston can make trouble, use stainless steel (is a bad heat conductuctive material) tube with thin wall as displacer due to prevent to lead heat into the cold camber in displacer cylinder and the length must be longer (3-4 times longer in length/bore ratio) to make more difference in temperature in hot and cold ends in the displacer cylinder. In hot end use stainless steel with thin wall to lead the hot into cylinder in short time without loss of heat and use aluminium with thin fins in cold end of displacer cylinder to lead the hot out of cylinder. Water jacket is good too.. Edited By Jens Eirik Skogstad on 01/01/2012 07:47:06 |
Thread: A Happy new Year to One and All |
01/01/2012 07:23:20 |
Happy New Year to all folks in model engineer club in home page! ![]() |
Thread: Brass against brass |
30/12/2011 14:11:17 |
As rule how the bearing will last long: unlike material against each other as slider/rotating parts etc..
As the photo showed the brass against brass, i will prefer the trunk guide in brass replaced to steel or cast iron and the cross head in brass, bronze or cast iron.
Cast iron to cast iron no problem if well lubricated..but the cast iron can be brittle if too thin to stand against load.
You can make the trunk guide bar of cast iron from old brake disc, saw the four bar of brake disc and machine them nice in milling machine to true and nice trunk guide. And the cross head of same material as in brake disc. ![]() |
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