Here is a list of all the postings mgnbuk has made in our forums. Click on a thread name to jump to the thread.
|Thread: Does anyone know where I can source a Myford 34t change gear?|
I asked RDG about availability of this gear on the 26th March & was told "around 6 weeks" - so possibly mid May, though if a 30th January enquiry suggested "at least 8 weeks" maybe mid June ?
I had a look around the usual secondhand suppliers yesterday & couldn't find one. I have a "commission" to make a wood lathe chuck adapter for one of my wife's colleagues that has 3 and 3.5mm pitch threads, so both gears required.
|Thread: Pendent control box for a VFD|
A quick search on Ebay using "22mm push button" came up with quite a few options from under £2 each delivered (from China). Change the search term to "16mm" if you want more compact switches.
|Thread: DraftSight no longer free|
My copy of Draftsight is copyrighted 2012 and, as far as I know, has no connectivity to Dassault Systems. It is a 2D only version. I don't expect this to disappear. Time. of course, will tell.
The "Important Notice" I received says "all free versions of DraftSight will cease to run after 31.12.2019", so you could be disappointed come the end of the year - that statement doesn't leave much room for misunderstanding, though maybe not if your copy of DS can't "phone home" ?. I couldn't copy & paste the contents of the message box & have yet to find a way of saving a screenshot as a picture to be able to upload it here, unfortunately.
The reason given for the change to a charging model is due to DS2019 having been "extensively re-written to provide 3D functionality and investing in other technologies including a Cloud based version" - Solidworks Lite, maybe ? It seems a bit mean to me to disable the 2D versions, many of the users of which (me included) would not be interested in the "robust 3D capabilities" for the 2D drawings they produce.
Just opened mine and cannot see a message - is it hidden somewhere?
A pop-up window down the RHS of mine headed "DraftNews" & then in red "Important Notice" appeared when I opened the program. I am using DS 2018 X64 SP3
Fusion 360 no use in my working environment, I'm afraid Brian. I use DraftSight for the odd drawing I need to do mainly for maintenance purposes, but with the odd project. I have downloaded DesignSpark Mechanical, but now find that requires a £500+ "upgrade" to get 2D.
Time to trial QCad & LibreCad for basic 2D, I think.
I had reason to open Draftsight today & there is a message informing that all free versions of Draftsight will cease functioning at the end of this year.
The least expensive version will be DraftSight 2019 Standard edition at $99 a year.
Looks like I will have to get to grips with DesignSpark Mechanical sooner than I thought !
|Thread: Hofmann Rotary table owners?|
UK agent contact details here :
May be easiest to try them first ? Failing that, the German parent company website also ahs contact details.
|Thread: ER25 or MT2 Collets|
I use MT2 collets for holding milling cutters in my FB2 clone. I prefer them for the reduced overhang from the spinlde nose that puts the cutter closer to the spindle bearings. Not had any problems with cutters slipping or pulling out, though as the FB2 clone has a captive drawbar I can pull the collets in tight and easily release them without having to pound on the drawbar.
The ability of ER collets to grip different sizes within each collets range isn't much of an advantage with milling cutters, as most are supplied with shanks to a standard size i.e 1 - 6 mm cutters all come with a 6mm shank.
|Thread: Soba rotary table|
Here's the kind of thing I was looking at: LINK
That looks like an industrial reduction gearbox with a short spindle added. Only 20:1 reduction & no clamping facility. As is typically the case the stepper motors are defined by frame size & current, not rated torque, but by the motor fame sizes output torque isn't going to be great. "This Old Tony" did a welding positioner based on a similar gearbox.
Output torque will be higher than the other item, though - 4:1 reduction with a 52 Ncm motor ! Maybe fine for engraving small plastic or wooden parts (as shown in the "application" photo), but not much more ?
My 6" Vertex RT came from a Harrogate show (Chronos IIRC) at least 15 years ago. Can't say I have noticed anything untoward about, but it hasn't seen much use. I have had mixed experiences with Soba tooling (more bad than good), to the point that I avoid the brand now.
I'm not sure I would want that technology in the garage. From their manual in the safety section regarding actions to be taken in the event of injury :
Injuries caused by high pressure waterjets can be serious. In the event of any waterjet injury the Waterjet Technology Association recommends:
This doesn't go as far as a former customer of mine who operated such a machine suggested - he stated that in the event of a cut the affected area had to be amputated two joints back from the site of the injury as a matter of course. His operators also carried a card for information of medical practioners in the event of an accident.
I would rather pay a specialist to produce parts than mess with one of these. I note that they don't give an indication of the cost of rebuilding the high pressure pump, the most expensive ongoing cost outside consumables like nozzles & abrasive IIRC.
|Thread: AutoCAD substitute|
Another Draftsight user here. I used Autocad LT at my last employment & find I can use Draftsight in the same way & with the same commands & mouse clicks as Autocad. There is a requirement to re-validate your details annually to use it, but this is quick & easy to do if you are on-line.
I recently downloaded DesignSpark Mechanical 3D software from RS Components to have a tentative stab at 3D CAD, but have yet to find time to have a go. This is also free, though you need to set up a DesignSpark account to validate it. My PC doesn't meet the specs for Fusion 360 (32 bit OS), but DesignSpark Mechanical runs fine.
|Thread: Warco Rotary Table - What Grease?|
Has anyone come across this and can they say what sort of oil to use?
I refilled a 24" "Bessboro" RT at work with 68 viscosity slideway oil after the ,machine operator found out the hard way that a horizontal, oil filled, RT wasn't designed to be bolted to an angle plate and retain its oil. The stuff that leaked out was pretty non descript & I have been unable to find out any information about Bessboro RTs to determine the original recommendation, but the slideway oil has proven to be fine. In an 8" RT in all probability anything medium viscosity & oily would also be fine !
|Thread: Quality issues with a SIEG SX2.7 mini mill|
have the original makers "M" mark cast into them
I was told that the "M" mark signified that the casting was Meehanite, not a maker's mark.
XYZ import (or have imported - they have been doing so for a while) Bridgeport type machines from at least two different makers - when looking for a manual on their website to order spares for our XYZ KRV2000 there were two makers of turret mills to choose from. The KRV is made by "King Rich" IIRC. Decent machine, but a bit big for my garage.
I was using a tool that produces a similar pattern finish to that shown in the OP today - a "soft" backing pad with fine abrasive disc on an angle grinder. The Biax power scraper (the machine tool fitters I used to work with refered to these as "diggers" ) produces a very different pattern, as Jason's picture shows.
I would be interested to have more details of the "scraper" that Sieg use, as I have not come across anything other than the Biax type in the UK. Given the price of Biax machines, something that does a similar job more economically would be of interest, though I suspect that I already have it.
Edited to banish the unwanted "smiley"
Edited By mgnbuk on 19/02/2019 19:46:19
|Thread: Aircraft General Discussion|
I work around 5 miles from RAF Linton on Ouse & contrived to have "something to do" outside at the appointed hour - saw & heard nothing ! An item on the local TV news this evening covered the 3 aircraft flypast at Linton, so I know they were there - just didn't approach or depart from my direction, unfortunately.
RAF Tornado Farewall tour
Rather late notification, but to mark the retirement from service of the Tornado a country wide flypast is taking place from today until Thursday. At the bottom of the link above are provisional timings.
|Thread: Boxford machinery auction|
Following on from an earlier posting about Boxford's premises having a For Sale sign before Christmas, details of a sale of machine tools popped in to my Inbox this morning.
Can't think that they will be making a lot when those machines have gone, but note the reason as "rationalisation of the business" so not dead yet ?
|Thread: Y axis problem|
Nearly but not quite - see annotations above
"T type of cutter - cutter number, used for toolchangers, it doesn't say anything about the type of cutter, simply where to find it" Depends on the system - some use the T number to call the tool offsets as well, so also applicable to machines without an ATC
% end program - more an end of file marker, somewhat obsolete now that programs are normally stored in memory rather than loaded on the fly from tape Still used on Fanuc
H home position - tool length offset, ie, relative length of each tool, and where to find it in the tool table Not on all systems, as above.
|Thread: Stepper motor and surface finish|
Many Matchmakers with Posidata stepper motor controls in industry back in the '70s, along with Bridgeports with (IIRC) the "Boss" stepper motor control. Acton & Beaver used the Posidata system as well. These used 1/2 step drivers so pretty coarse by modern standards, yet I saw those machines making aircraft & turbine parts and used in goverment research departments.
I took ptenty of those systems off & replaced them with Heidenhain controls & DC servo drive sytems (SEM motors & Indramat amplifiers) in the mid-'80s to mid '90s in a previous employment.. I don't recall anyone commenting on improved surface finish after the conversions, which were usually done to gain reliability and improve useability. Going closed loop with a measuring system & not having to deal with lost steps was also an advantage.
Doing such retrofits died the death when the smaller capacity machines that usually had the stepper motor controls got cheaper new (like Bridgeport Interacts & Spanish/Taiwanese imports) & the cost of the conversions rose over time, so it no longer made financial sense to retrofit an old machine.
|Thread: WHERE ARE THE SHAPER USERS ?|
When the wiring was removed, a crimp fell off too
Not really suprising since none of the remaining connectors are properly crimped. Looks like they were bodged on with a pair of those awful pressed steel abominations sold as "crimping tools" - such "tools" get an otherwise reliable termination system a bad name.
Nigel B (Boxford 8" shaper owner)
|Thread: Boyes of York, good value|
Not all Boyes stores carry all items, though. The original store in Scarborough & the Skipton store are far larger than my local store in Brighouse, for example. Brighouse doesn't carry as comprehensive a range of hobby lines as Skipton - no Vallejo Model Air paints in Brighouse, just Model Color for example. So if you want something specific, it may be worth phoning the store you intend to visit to ensure that they carry the item - though I apprecaite that could be difficult if you don't know what the full product range is !
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