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Re: Threadcutting on a Unimat 3
On Mon, Jun 19, 2023 at 11:07 AM, Peter Brooks wrote:
Ideally I'd like to be able to cut imperial threads as well but (as I understand it) this would require a 127 tooth wheel, which at MOD 1 couldn't possibly fit on a plate between the headstock and lead screw shafts.Somewhere I have a set of change wheels for inch threads on the Basic (also a 1 mm pitch lead screw) and clever things are done using 17 tooth wheels. It gets very close to the correct pitch - last time I calculated it the error was something like 0.1 mm over the length of the lathe. Unfortunately the gears are 0.75 Mod, which is not common, so sorting out further pitches is a problem. I can't find the charts at the moment. On another lathe I saw lots of pitches using a 19 tooth wheel, but that was for making metric pitches with a ?" pitch lead screw. A quick example: with a 1 mm pitch screw (25.4 tpi) using a drive of 17:18 gives a pitch of 23.988888 tpi - near enough for 24 tpi, certainly for a short length of engagement. Playing with the numbers should yield other inch pitches. Allowing for a compound gear somewhere in the drive should make many more pitches available. The game is to find lots of pitches that only require a limited number of wheels. |
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Re: U3 cad files
#photo-notice
Lars Herrnsdorf
TO SMJ
Thank so very much for this fantastic? 3d solid model with all details . I have extracted the Unimat 3? basic parts? from the complete file without problem . Thank You again SMJ for make this impressive cad file? available? Lars |
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Re: U3 cad files
#photo-notice
Lars Herrnsdorf
Hi , I found as solution , please find a zip file with the accis solid? core in SAT version 7 format?
Best Regards Lars? |
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Re: U3 cad files
#photo-notice
Lars Herrnsdorf
Hi SMJ
I use the Unimat 3? as a? 3d? jig holder? and my jig is in a 3D solid format using? my 3D program , but it should b great to also? have the whole? thing in the? 3D !! I have a 3D cad/Cam? program PIC 3.3 based on the ACIS? core? (using the *.SAT extension )? that do not support step , do you have the possibilities to export the? fantastic U3 files in that format , (using SAT version 7 works ) It should be? great? to use the native solid model instead of the stl? version that I can import (see attached files ) Is that something that You can help? me? with ? Best Regards Lars Herrnsdorf |
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Re: Small DRO for Unimat?
Lars Herrnsdorf
Hi Ron?
I hav bought similar? DRO? with resolution 0.01 mm as the attached picture ,? Is it possible to give the stl files? you 3D print? your? solution, then I may can use your stl files as a bes for me to? modify? to be used with my DRO Can you assist me with that ? Cheers Lars? |
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Re: U3 cad files
#photo-notice
Lars Herrnsdorf
Hi
I can not read *.stp files . Is it all possible to export it to a *.sat file? (version 7 works well)? Best Regards Lars? |
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Threadcutting on a Unimat 3
Please excuse the flurry of messages from me - symptomatic of an enthusistic newbie I think!
I've been intrigued by the various threadcutting messages and docs, particularly the solutions as alternatives to the 150.250 Emco Threading Attachment. Some questions... 1) I really like the ingenuity and versatility of the simple 'nut and bolt' concept (example are the 'Mert Baker¡¯s Unimat Theading Method' message thread and the 'uni-threading.pdf' on the last page of the 'Files' section). I have a Unimat 3 though, and this design looks to be intended for the earlier Unimats with a sliding quill feed. Would this work on a Unimat 3 by slackening the headstock locking bolt? Or would there be too much play? (I've also seen the 'Simple thread cutting on a Unimat' pdf but this requires a threaded hole in the work). 2) If 1) isn't possible on the Unimat 3 then the 'change gears' style system (as in 'Unimat 3 Threading Attachment' pdf) would be the option. Ideally I'd like to be able to cut imperial threads as well but (as I understand it) this would require a 127 tooth wheel, which at MOD 1 couldn't possibly fit on a plate between the headstock and lead screw shafts. I suppose it would be possible to make a set of wheels at a smaller MOD (with a different plate design). Has anyone got imperial threading working on a change gear system, and if so, how did you do it? (I don't have a 3D printer BTW). Thanks, Peter |
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Re: DWG to DXF please
try this, its a convert from the original Microstation dgn drawing i did 11 years back now. Peter Ashby
------ Original Message ------
From "Peter Brooks" <peter@...>
To "Mike Gidley" <mike.61dley@...>; [email protected]
Date 19/06/2023 10:07:12
Subject Re: [Unimat] DWG to DXF please Thanks Mike, I have seen (and downloaded) the PDF but there are some dimensions missing from the drawing (and I think I read that some are wrong - radius instead of diameter or suchlike). Having the file in a DXF format would be great, hopefully someone has Autocad or a similar weighty program and can do an export. |
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Re: DWG to DXF please
Thanks Mike, I have seen (and downloaded) the PDF but there are some dimensions missing from the drawing (and I think I read that some are wrong - radius instead of diameter or suchlike). Having the file in a DXF format would be great, hopefully someone has Autocad or a similar weighty program and can do an export.
I saw a post of yours with the finished components laid out on top of a printout. To a novice like me this is a great help and aid to understanding the finished parts. Do you have larger versions of the photos by any chance? I've been reading all the various 'threading' threads (ha ha), I've had a good rummage in 'Files' and also perused 'Photos' (but not dipped into all the folders there). Thanks, Peter |
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Re: DWG to DXF please
Look for the pdf file of the same plan its there? On Mon, 19 June 2023, 5:48 pm Peter Brooks, <peter@...> wrote: Could someone with the appropriate software please re-save the file 'unimat3 threading attachment.dwg' (in Files) as a DXF - so that it can be opened by programs that don't support the DWG format? |
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Re: ALERT eBay¡¯s Latest Attempt to Fleece Buyers and Sellers
All human enterprises seem to have some "bad apples."? And in the case of eBay, I'm sure many have seen inaccurate listings merely because the seller didn't know anything about the subject matter (such as model railroad engines)."? I've been burned once by a deliberate scammer.? A couple of times something innocently not as described, a couple of times something badly packed.? And even a couple of times where a dishonest buyer scammed me (and I certainly DO block them.)? I have dealt with over 4,000 other eBayers, have almost 5,000 feedbacks (buyers and sellers) which means something north of 5,000 transactions since some don't bother to leave feedback.? I would consider the percentage of malfeasance, at least in my case, as an exceptionally low percentage.? In fact, I find it amazing how well eBay works since eBay is wide open to everybody with a vast range of skills, or lack thereof, and wildly different levels of business acumen, or lack thereof. But most everybody who transacts a lot on eBay will have some anecdotal story of grief.? Just like somebody will always have a shipping grief anecdote (USPS, UPS, FED EX, take your pick). Charles E. "Chuck" Kinzer
On Sunday, June 18, 2023 at 09:10:44 PM PDT, Gerald Feldman <gfeldman2904@...> wrote:
e-Bay wasn¡¯t like that a few years back, as I was burned a couple of times by sellers that overtly lied about the goods (such as saying a tool was ¡°new¡± and then finding the seller¡¯s name carved into it).? Sent pictures to e-bay and they did nothing.? When I tried to complain to the seller, they banned me from contacting them.? Nice! ? Jerry F. ? From: [email protected] [mailto:[email protected]] On Behalf Of Tom Browne
Sent: Sunday, June 18, 2023 6:55 AM To: OldToolmaker; [email protected] Subject: Re: [Unimat] ALERT eBay¡¯s Latest Attempt to Fleece Buyers and Sellers ? As a buyer, what I like about PayPal is that they will go to bat for me if the seller doesn't respond to an issue; PayPal's entire business model involves keeping me happy, especially by protecting my credit card info, so I will continue to use them and pay the fee. EBay's business is facilitating transactions, and yes this includes protecting credit card info; but it is not the one and only reason for their existence as it is for PayPal. It looks like eBay is trying to muscle back into the payment territory it left to PayPal when it was spun out. |
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Re: ALERT eBay¡¯s Latest Attempt to Fleece Buyers and Sellers
¿ªÔÆÌåÓýe-Bay wasn¡¯t like that a few years back, as I was burned a couple of times by sellers that overtly lied about the goods (such as saying a tool was ¡°new¡± and then finding the seller¡¯s name carved into it).? Sent pictures to e-bay and they did nothing.? When I tried to complain to the seller, they banned me from contacting them.? Nice! ? Jerry F. ? From: [email protected] [mailto:[email protected]] On Behalf Of Tom Browne
Sent: Sunday, June 18, 2023 6:55 AM To: OldToolmaker; [email protected] Subject: Re: [Unimat] ALERT eBay¡¯s Latest Attempt to Fleece Buyers and Sellers ? As a buyer, what I like about PayPal is that they will go to bat for me if the seller doesn't respond to an issue; PayPal's entire business model involves keeping me happy, especially by protecting my credit card info, so I will continue to use them and pay the fee. EBay's business is facilitating transactions, and yes this includes protecting credit card info; but it is not the one and only reason for their existence as it is for PayPal. It looks like eBay is trying to muscle back into the payment territory it left to PayPal when it was spun out. |
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Re: ALERT eBay¡¯s Latest Attempt to Fleece Buyers and Sellers
You can use eBay AND pay by PayPal for a purchase on eBay. Usually, eBay significantly favors buyers over sellers (one of the complaints sellers have about how eBay has evolved.)? But I can't comment on a particular case I don't know about, and I also don't know if the buyer escalated the issue within eBay. Charles E. "Chuck" Kinzer
On Sunday, June 18, 2023 at 06:12:06 PM PDT, Charles Kinzer <ckinzer@...> wrote:
eBay is a business with facilities and staff.? They must have pay raises to keep competitive.? Their other costs like utilities, insurance, and everything also goes up just like it does for all of us.? Their "cost of doing business" does not stay static. Charles E. "Chuck" Kinzer
On Sunday, June 18, 2023 at 04:49:23 PM PDT, Tom Browne <tbrowne.mtl@...> wrote:
Did you pay through PayPal or a credit card direct to eBay? ? ? Tom ? ? Tom Browne +1 514 523 9508 ? From: John Hutnick <johnhutnick@...>
Sent: Sunday, June 18, 2023 11:47 AM To: Tom Browne <tbrowne.mtl@...>; [email protected] Subject: Re: [Unimat] ALERT eBay¡¯s Latest Attempt to Fleece Buyers and Sellers ? I bought a phone on Ebay, $800.? Seller sent wrong one, I returned it.? Ebay did not refund to my card, then said item was closed.? Had to dispute with bank.? So all is not wonderful with Ebay Paypal every time. -- Tom Browne |
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Re: ALERT eBay¡¯s Latest Attempt to Fleece Buyers and Sellers
eBay is a business with facilities and staff.? They must have pay raises to keep competitive.? Their other costs like utilities, insurance, and everything also goes up just like it does for all of us.? Their "cost of doing business" does not stay static. Charles E. "Chuck" Kinzer
On Sunday, June 18, 2023 at 04:49:23 PM PDT, Tom Browne <tbrowne.mtl@...> wrote:
Did you pay through PayPal or a credit card direct to eBay? ? ? Tom ? ? Tom Browne +1 514 523 9508 ? From: John Hutnick <johnhutnick@...>
Sent: Sunday, June 18, 2023 11:47 AM To: Tom Browne <tbrowne.mtl@...>; [email protected] Subject: Re: [Unimat] ALERT eBay¡¯s Latest Attempt to Fleece Buyers and Sellers ? I bought a phone on Ebay, $800.? Seller sent wrong one, I returned it.? Ebay did not refund to my card, then said item was closed.? Had to dispute with bank.? So all is not wonderful with Ebay Paypal every time. -- Tom Browne |
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Re: ALERT eBay¡¯s Latest Attempt to Fleece Buyers and Sellers
Tom Browne
¿ªÔÆÌåÓýDid you pay through PayPal or a credit card direct to eBay? ? ? Tom ? ? Tom Browne +1 514 523 9508 ? From: John Hutnick <johnhutnick@...>
Sent: Sunday, June 18, 2023 11:47 AM To: Tom Browne <tbrowne.mtl@...>; [email protected] Subject: Re: [Unimat] ALERT eBay¡¯s Latest Attempt to Fleece Buyers and Sellers ? I bought a phone on Ebay, $800.? Seller sent wrong one, I returned it.? Ebay did not refund to my card, then said item was closed.? Had to dispute with bank.? So all is not wonderful with Ebay Paypal every time. -- Tom Browne |
