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Re: through bore
Hi John,
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Ah yes, the grey matter's working today. I just searched the archives and recalled sufficient key words (reamer+chris). Check out message 18553. John --- In 7x12minilathe@..., "John" <botmom@...> wrote:
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Re: Mini-lathe controller rectifier question
Hi Alan,
As Jim indicated, these things aren't critical as long as they can handle the volts and amps of the application and are over-rated sufficiently to handle the sub-standard heatsinking. Re orientation, they are usually marked with '+' and '-' on the DC terminals with the AC ones being marked either AC or '~'. The two AC terminals are interchangeable. Often the '+' terminal will have a chamfered corner, dot or some other marking to reduce assembly errors. The PCB overlay usually (always, if I designed it) has similar markings as well. John --- In 7x12minilathe@..., "Jim RabidWolf" <unclerabid@...> wrote: cool) and at least 600 volts.as will 10 at 800 .... GIve me a yell if you have trouble finding one. IFyou'll send me a the board number, I'll tell you what the original was.Castings!) the darn thing. Does anyone know the part number? I had a rectifieron order but when it came it, it did not look like the old one. Also,looking at that side, which way was the flat on the rectifier? I seem tomills and lathes. |
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Re: Mini-lathe controller rectifier question
Jim RabidWolf
You need something that will handle at LEAST 8 amps (so it'll run cool) and
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at least 600 volts. The OEM's are marked as 1000 volts 10 amps - 8amps at 1000 will do as will 10 at 800 .... GIve me a yell if you have trouble finding one. IF you'll send me a the board number, I'll tell you what the original was. Jim RabidWolf Uncle Rabid ( ) We Repair Electronic Speed Controllers For Asian Mini Lathes and Mini Mills "Just Crazy Enough To Get the Job Done" (Join Rabid's Lathe/Mill Controller/Mod's List!) (Also visit BarStockEngines - join us in building without Castings!) ----- Original Message -----
From: "Alan Reeves" <goatfarm@...> To: <7x12minilathe@...> Sent: Tuesday, April 03, 2007 6:17 PM Subject: [7x12minilathe] Mini-lathe controller rectifier question I have a Homier Mini-lathe with a shorted bridged rectifier. I removed the rectifier to see if I could buy another and have lost the darn thing. Does anyone know the part number? I had a rectifier on order but when it came it, it did not look like the old one. Also, the rectifier is in the lower left of the circuit board when looking at that side, which way was the flat on the rectifier? I seem to remember it was up and to the left. Any help would be appreciated. Thanks Alan Be sure to check out for small mills and lathes. Yahoo! Groups Links |
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Mini-lathe controller rectifier question
I have a Homier Mini-lathe with a shorted bridged rectifier. I
removed the rectifier to see if I could buy another and have lost the darn thing. Does anyone know the part number? I had a rectifier on order but when it came it, it did not look like the old one. Also, the rectifier is in the lower left of the circuit board when looking at that side, which way was the flat on the rectifier? I seem to remember it was up and to the left. Any help would be appreciated. Thanks Alan |
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Re: First prototype of the laser edge/center finder done!
Hi,
You mean like eBay item 150102904848? I've bought some of these and thought them pretty cost effective. He seems to have wound up listings today - probably having Easter off. But it's hard to beat 10c each! John --- In 7x12minilathe@..., Victoria Welch <wrlabs@...> wrote: **44, *76 volt "n"depending on the chemistry and drain) Radio shack sells 6 cheapsized batteries which contain 4 cells. They might even offer the thoseas your pointers but might be fresher.Bloody expensive as hell for those things from rat shack and at prices I wonder how much they do move.was $6.95 for one from them.the battery places online for about a wash after shipping. |
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Re: First prototype of the laser edge/center finder done!
--- In 7x12minilathe@..., Victoria Welch <wrlabs@...>
wrote: really pleased with is Futurlec. MUCH cheaper than rat shack andgenerally at very least the same if not better quality. Problem is thatshipping to the states takes FOREVER :-). IG (Instant Gratification, takestoo long to say :) isn't possible ;-). No connection, just a happyYes, I've bought a lot from them over the last year. Their prices get even better on quantity but if you exceed their shelf quantity on one item the whole order gets slowed by an extra month or so. Not sure which shopfront you went through but everything seems to ship from Bangkok. Say, you're one diverse character. Here on a lathe forum and knowing about RF connectors and obscure e-sources like Futurlec. I thought you were a software guru. Is the e-hardware bit another life? John |
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Re: First prototype of the laser edge/center finder done!
Victoria Welch
On Tuesday 03 April 2007, Jeff Demand wrote:
John,Bloody expensive as hell for those things from rat shack and at those prices I wonder how much they do move. My caliper battery went dead and I went by rat shack and IIRC it was $6.95 for one from them. Lived with the flashing display and ordered 10 of them from one of the battery places online for about a wash after shipping. Even the grocery store had a 3 pack of them for less than that. Pardon, but I think of rat shack in terms of desperation :-). Take care, Vikki. -- Victoria Welch, WV9K/7 "As you are, I once was. As I am, you will be." -inscription on a tombstone (in Boston, I think) |
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Re: Broke the tap, Grrrrr.
Victoria Welch
On Tuesday 03 April 2007, born4something wrote:
--- In 7x12minilathe@..., Victoria Welch <wrlabs@...>LOL, now there is a good perspective on it all! I've worked with the same types who managed to get into the high paying world of the computer industry and spent more time fixing their stuff than doing my own work and I would have indeed been thankful had they been someplace else :-)! Take care, V. -- Victoria Welch, WV9K/7 "Democracy isn't just the best form of government; its the only one even remotely worth a damn. Only democracy guarantees people get what they deserve." -- Zeno Marley (Early 21st Century Mercenary-Philosopher) |
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Re: First prototype of the laser edge/center finder done!
Victoria Welch
Hi John,
On Tuesday 03 April 2007, born4something wrote: --- In 7x12minilathe@..., Victoria Welch <wrlabs@...>There is one other issue that was pointed out to me and that was if the sales droids there actually knew something they would be directing you elsewhere. Known more than a few people who were knowledgeable who worked for them briefly and left over issues like that :-(. Now that they are selling more name brands, it may not be as much of an issue assuming that the old rumor that they sell floor sweeping isn't true :-). That said, I have gotten some RF connectors from them that certainly appear to be very good but still quit pricey. Forced to admit that the higher price was offset by the fact I could get what I needed *now*. We have one store here in the area that caters to parts people, a real blessing. For what it's worth Ian, Jaycar here in the east are a bit betterOne place down under I ordered a bunch of parts from that I was really pleased with is Futurlec. MUCH cheaper than rat shack and generally at very least the same if not better quality. Problem is that shipping to the states takes FOREVER :-). IG (Instant Gratification, takes too long to say :) isn't possible ;-). No connection, just a happy customer. Now if I could just plan 3 weeks or so ahead, they would be about perfect :-). At those prices I can afford to stock up on stuff when I do order though. Take care, Vikki. -- Victoria Welch, WV9K/7 ¡°He who does not punish evil commands it to be done.¡± --Leonardo Da Vinci |
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Re: First prototype of the laser edge/center finder done!
--- In 7x12minilathe@..., Victoria Welch <wrlabs@...>
wrote: rat shack, problem is that the have it locally - overpriced, almostalways clueless sales droids, not great quality, but it will do whensomething MUST do.it ;-) LOL!Hi Vikki, At the risk of making that the fastest growing group on Yahoo, I've heard that these stores specifically select junior sales staff on having pretty minimal expertise in electronics. Just enough to sell stuff if the customer picks it off the shelf. If they know too much then they get tied up in detailed free advice sessions at the counter. That eats up man-hours as well as creating liability issues. For what it's worth Ian, Jaycar here in the east are a bit better than that. Now Dick Smith is another matter... John |
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Re: Broke the tap, Grrrrr.
Victoria Welch
On Tuesday 03 April 2007, born4something wrote:
It sure was![ ... ]Eureka! Great feeling when a broken tap is sorted! Trying to get around that to bore out the center more screwed up my boring bar and I am still trying to figure out how to hone it down on the diamond lap - it looks right but doesn't seem to cut as before. I had the impression that carbide would remove the part of the tap sticking down into the bore - apparently not. Cost me a few PCB drills to figure it out, but one pays for education one way or the other :). Hopefully that is indeed traumatizing :). Painful lessons are the bestHopefully there will not be a next time to experiment with thealum :-). learned? Color me optimistic anyway :). Very very true!All's well that ends well and I learned a bunch in the process!Can't hope for much better. Hey here's a laugh for you. I dropped into the local BunningsSounds like Lowe's yesterday, I asked about alum at the service desk and spent 5 minutes telling the sales droids that "Yes, I have looked on this isle, that isle and the other isle and that one too" Finally I suggested he look up "alum" on the computer in front of him. Seemed to surprise him that he could do that. Where *do* the get these people?!??!? Sigh... Thanks & take care, Vikki. -- Victoria Welch, WV9K/7 "90% of the politicians give the other 10% a bad reputation." -- Henry Kissinger |
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Re: Broke the tap, Grrrrr.
Victoria Welch
Hi Mick,
On Tuesday 03 April 2007, Michael Walter wrote: Hi Vicky,Sigh, sure did :-(. Problem is at my current level of ignorance / inexperience I really don't know what a good one is. Is spending $10+ for one from, say Enco, a "good one". Sigh, much to learn - the more I learn the more it becomes obvious how little I know :-). I have an ulterior motive for replying to you! WhereI faked it as I went along :-). Initially (in my ignorance and nativity) I thought I could just get one, tape the button down and chuck it up :). After the folly of that thought train became obvious I knew I needed something that would allow me to center it. Not sure where the idea for the mount came from, probably the mechanical center finder hacked to hold the laser pointer (I got mine stuck in a end mill holder and had to pull it apart to get it out - it was hollow for the spring connecting both center and edge ends, just make it bigger to hold the laser pointer :-). Some of the commercial ones out there are contained in something similar so I am sure that provided some inspiration. The initial idea was optimistic on the bored out center diameter, I do need to update the drawing of it I posted to reflect that. With the variance from straight on these things, it became obvious really quickly that I needed much more room to move the stuffed-up-the-snout laser pointer around in it to actually get it to center. Glad all I had was a 1" round to work with, anything else would have been too small I think. HTH! Take care, Vikki. -- Victoria Welch, WV9K/7 "Remember, democracy never lasts long. It soon wastes, exhausts, and murders itself. There never was a democracy yet that did not commit suicide." - John Adams. |
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Re: First prototype of the laser edge/center finder done!
Victoria Welch
On Tuesday 03 April 2007, rancerupp wrote:
Vikki, I'm sure I missed it somewhere along the way but would youFound them at a "Dollar Store" I just happened to see as I was running errands. I don't even remember the name but I do remember where it is :-). These abound here in Seattle (popular because cost of living is so high here :-). Bargain Bin, 99 cents store and probably 100 other names. Really cheap Chinese stuff and ?almost? all of it sells for under a dollar. After wandering around in several of them and never finding any laser pointers, I got bright and asked if they had them at this last one and he had a whole case of them behind the counter :-). HTH! Take care, Vikki. -- Victoria Welch, WV9K/7 ¡°He who does not punish evil commands it to be done.¡± --Leonardo Da Vinci |
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Re: First prototype of the laser edge/center finder done!
Victoria Welch
Wow, what a pile of messages to wake up to :-)!
On Tuesday 03 April 2007, Ian Foster wrote: G'day Vikki,Upon the recommendation of John at GadgetBuilder I tried the pinhole in a piece of kitchen aluminum foil which works really well to improve the original spatter beam. As for attachment, I used rubber cement on the end of the laser pointer and the back of the aluminum foil - sorta like contact cement but removable. You can see this at the second entry under the temp stuff, specifically: I've got an idea to improve on this using what is essentially a single hole paper punch and the PCB drills. I got email from John that has some pointers in it for improving this, but haven't done more than skim it at this point (only starting on the second cup of coffee here :-). To Others:MUCH better pricing than what I found, which was the impetus for using the cheap laser pointers. BTW I am NOT pushing Jaycar. I find their sales staff more uselessSounds like Radio Shack here (aka: rat shack, the floor sweeping store, "How is your cell phone service" store, do you need batteries store...) only somewhat better ;-). Where is the {some part} usually results in the deer in the headlights look until you remind them they have a computer to find out from. Etc. ... Better get off the soap box before I get exiled to another group!:-), I usually rant a bit coming back from a desperation run to rat shack, problem is that the have it locally - overpriced, almost always clueless sales droids, not great quality, but it will do when something MUST do. Heh, I'l shut up too lest we have to start a 2 person group over it ;-) LOL! Take care, Vikki. -- Victoria Welch, WV9K/7 "I fly because it releases my mind from the tyranny of petty things" --Antoine de St-Exup¨¦ry |
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Re: First prototype of the laser edge/center finder done!
G'day Vikki,
When you first reported on your laser edge finder developments you said the beam size was disappointing. I take it from your pictures that you have managed to narrow the beam. Did you use a lens or a pin hole? How have you kept the focusing device in place? To Others: In Oz and now the UK Jaycar are selling Laser diodes with collimating lens AUD9.95, or another module for AUD13.95. The forward voltage of the diode is 2.3 volts so it could be powered from two AA cells through a dropping resitor. Contact me it you need details. BTW I am NOT pushing Jaycar. I find their sales staff more useless than those in machine tool stores. What is it about these kind of people? (Other electronics stores are almost as bad, except for Tandy) They act like they are doing you a favour by letting you have some precious item from their personal collection. Haven't they heard of up selling? "Do you want Fries (batteries) with that?" A few questions about the customer's project would open up sales opportunities. Thankfully I know enough (apart from the latest gizmos) to intimiddate them back!!! I'll write to Jaycar management. Better get off the soap box before I get exiled to another group! One good turn deserves another. Regards, Ian |
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Re: First prototype of the laser edge/center finder done!
Malcolm Parker-Lisberg
Andrew
The pound shops have a laser level for ?1, uses 2 x AAA cells. It is a spot laser shining through a prism to give a vertical line and has the push on, push off switch. see ebay item 170097006100 andrew franks <andyf1108@...> wrote: Malcolm, the little brass-mounted laser units are available from Maplin here in the UK, at about ?11 (add your own switch and 3v power source). The stock number is LE07H. Not as cheap as the US Dollar Store, but maybe worth a look? Andy Malcolm Parker-Lisberg <mparkerlisberg@...> wrote: A much smaller centre finder can be made by removing the laser diode and mounting it at the end of perpendicular crossed flexures, rigidly mounted at the other end. Only two adjusting screws are then required, set at 90' to each other, giving independent X and Y adjustment, as the non adjusted setting screw slides across the flexure as the other screw is adjusted. The lasers in the cheap laser levels have push on push off switches and brass mounted laser diodes rather than PCB mounted diode. This has been on my 'to do' list for two years. Victoria Welch <wrlabs@...> wrote: Hi Folks, Got it together and almost calibrated tonight: Under temporary working stuff - First entry: first prototype. Initial results are encouraging! Ended up having to bore it out more since these $1 laser pointers do not have a vaguely centered beam. Kinda pleased. Will sit down and finish the calibration tomorrow, was kind of worn out tonight. Getting it close was a lot easier than I expected it to be. Take care, Vikki. -- Victoria Welch, WV9K/7 "Walking on water and developing software to specification are easy as long as both are frozen" - Edward V. Berard. --------------------------------- Be a PS3 game guru. Get your game face on with the latest PS3 news and previews at Yahoo! Games. [Non-text portions of this message have been removed] --------------------------------- Inbox full of unwanted email? Get leading protection and 1GB storage with All New Yahoo! Mail. [Non-text portions of this message have been removed] --------------------------------- Bored stiff? Loosen up... Download and play hundreds of games for free on Yahoo! Games. [Non-text portions of this message have been removed] |
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Re: First prototype of the laser edge/center finder done!
andrew franks
Malcolm, the little brass-mounted laser units are available from Maplin here in the UK, at about ?11 (add your own switch and 3v power source). The stock number is LE07H. Not as cheap as the US Dollar Store, but maybe worth a look?
Andy Malcolm Parker-Lisberg <mparkerlisberg@...> wrote: A much smaller centre finder can be made by removing the laser diode and mounting it at the end of perpendicular crossed flexures, rigidly mounted at the other end. Only two adjusting screws are then required, set at 90' to each other, giving independent X and Y adjustment, as the non adjusted setting screw slides across the flexure as the other screw is adjusted. The lasers in the cheap laser levels have push on push off switches and brass mounted laser diodes rather than PCB mounted diode. This has been on my 'to do' list for two years. Victoria Welch <wrlabs@...> wrote: Hi Folks, Got it together and almost calibrated tonight: Under temporary working stuff - First entry: first prototype. Initial results are encouraging! Ended up having to bore it out more since these $1 laser pointers do not have a vaguely centered beam. Kinda pleased. Will sit down and finish the calibration tomorrow, was kind of worn out tonight. Getting it close was a lot easier than I expected it to be. Take care, Vikki. -- Victoria Welch, WV9K/7 "Walking on water and developing software to specification are easy as long as both are frozen" - Edward V. Berard. --------------------------------- Be a PS3 game guru. Get your game face on with the latest PS3 news and previews at Yahoo! Games. --------------------------------- Inbox full of unwanted email? Get leading protection and 1GB storage with All New Yahoo! Mail. [Non-text portions of this message have been removed] |
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Re: H/L Gears
JD
Thanks So much!!
--- In 7x12minilathe@..., "Chris Wood" <chrisw@...> wrote: gears on the intermediate shaft are still plastic so there is somethingto break. They are the easy ones to replace.mini mills.while cutting steel.. Many Thanks |
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