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This looks like a proper flood coolant hose, reminds me on this Cartoon. "This model is not exactly cheap, but it takes only twelve seconds to fill up the bath tub." http://www.informatik.uni-oldenburg.de/~pipsoft/pics/loriot.gif Just in case you consider retrofitting a coolant pump. :cool:

You can explain it to me, but you cannot understand it for me. :cool: Having trouble to follow. ..... trying to explain it to myself. Set the compound to an angle, keep the saddle stationary and move the boringbar (mounted on compound) into the workpiece that rotates in the chuck. It results in...

A new (to me) type of drill. It seems to be even doable with my "home shop" tooling. Do you think this can be DIYed with a Quorn style Grinder? Carbide blank about 4-6 USD, Grinding wheel 60-70 USD, grinder between 1000 and 500 000 (depends on automatiion grade and model year :cool: )

Drill in Aluminium can wander, I drilled some holes (were it did not matter too much, but the part was scrap because the holes were off a lot) It was an 8mm hole about 90 mm, or so, long. I think I pushed the drill too hard, and when (if) there was build up on the cutting edge it went downhill...

Did I miss the surface plate? GreenTwin is missing swarf. Did you clean for the video? I produce more swarf than parts, I think. I just dump the swarf in front of the neighbours door :cool:. No complaints; lucky me. ... :D...

Hello, if you only want to do the 90° divisions you probably will not face any of the problems, others had with gear cutting. Greetings Timo

Why? Did they want it for their museum? Did they not understand it? Or were the values to outdated?

Right now I am struggling to understand one of the software version that are roaming around. It does not do what I (we) want it to do. ( Looks like you need to tension your timining belt :-) too. ) If you would you could check if your indexer makes a good full round when you try 3, 4, 17 and...

At the moment I feel like the 10 year old who ripped appart Grandpas old Alarm clock. No one knows if all the pieces come back together ever. No one knows what is lost :cool: .

Just for completion the obligatory questions, so that you do not get the feeling the forum is a safe place: "What is it good for?" "What does it do?" :cool: I like that some parts are polished, others not. "Overpolished" looks sometimes too much like a toy. (matter of taste) Are both steam...

It seems the program also allows to enter angle increments (with two digits?). When trying to use the same variables for both situations I am getting stuck.

@L98 you can find a "sort of working" arduino code in Post #54 as zip. But I think it should be replaced and tidied up a bit. in post #57 awake provided an excel sheet that shows what the program calculates. (sort of a simulation of his example code from post #55. Have fun! *do not trust...

Actually the problem was described in the thread "Arduino rotary indexer for dummies", but I could not find any post of a stabe software for the arduino that had a stable (working with any given numbers) "fix" for it. Some people realized limitations, and seemed to have lived with them, by using...

Hello, Stefan Gotteswinter is using an Emco Maximat Super 11 similar to this one (photo from internet). Maybe I confuse the wording. What do you consider an "exactly manual lathe"? I consider everything a "manual Lathe" that does not use a computer to run it. Reading your comment about...

Did you try thread milling? Maybe useful for future similar parts. Stefan Gotteswinter posted a video "Threadmilling on a manual lathe", I find it much better specially for short threads to a shoulder. Greetings Timo

That is the charm of the obsolescence: Production equipment becomes obsolete and then can find its way into hands of hobbyists My milling machine is made in 2003, I probalby would not have bought a new one. I usually still find spare parts for it, because it is not yet "out of support". (parts...

Basically the solution was given by awake in post number #55. I think of it like a dividing head with only one dividing plate. (steps per revolution on the motor beeing the holes). The Plate in our example has 200 holes, The indexer has a 40:1 ratio. That makes a total of 8000 holes for a full...

The approach you proposed is probably better with larger step per revolution counts. The problem is that the "digitalWrite" function of the Arduino is too slow to allow for a reasonable high step frequency, so switching of the pin is the bottle neck here. The calculation of the steps to move...

Hello, If I multiply the number of steps per revolution, by the tooth count here (j [1..36]), then divide by the total number of teeth by the (Division [36]), I get the total number of steps from zero to the tooth number j. The number of steps to send to the subroutine rotation( ToMove ) is...