Member postings for Martin Newbold

Hi Nobby I have the same arm as you . I only needed a short arm . My gears have pins in too I post pictures set up with my reverse tumbler fitted.

Cheers blackcat hope your gears worked.

Thanks everyone for answers its the spindle thread. The three bolts were good and solid. It was not wrenched on and was cutting brass pretty soft stuff.

Have no clue why it failed . I have only just put it together bought it on here and its had really little use Is there any reason why they are made from cast iron and not steel . Can i buy a steel one its a ml7 thread on a drummond lathe spindle it was not over tightened . The original 5" I have replaced it with is steel backplate. can i get hold of one please? I am worried if i buy a new myford one it will do same thing?

Can anyone help thanks for looking

Thanks M

I was turning brass washers today 3/4" inside dia and my chuck went floppy . I stopped the lathe and it was sitting lopsided.

I took it off and all the threads in the back plate are broken . Is this a cheap back plate or has anyone else had problems like this?

Thanks for looking

Edited By Martin Newbold on 30/04/2018 18:20:47

I have been looking at the diverse collection of lathe tools and only have experience of the my ford carbon tipped tools. I note there are Chinese makers making Osrom or something similar and there are also indexable carbide inserts. does anyone have any experience in using these tools of different type and what are you using now and why please?

Not really no Jason its 1.5" BSP as it seems to small if that 1.5" .

If i put a vernier gauge across bottom of bigger part male its 45.75. This is the lower profile in the dips of the thread and will just push into other part without going into threads

its on a lathe will boss white stand up to cutting fluid? I would rather bin this part and connect onto threaded bigger thread which is around 46mm  x 12tpi i think that makes it 1 7/8"

Edited By Martin Newbold on 04/03/2018 14:46:40

the other end i think it screws on to is 46mm 12 tpi

Edited By Martin Newbold on 04/03/2018 14:22:54

its 32mm Jason

I have heard that brazing with heat can remove stainless properties so i am looking for alternatives. The outside is 32mm

Edited By Martin Newbold on 04/03/2018 13:59:48

i want to end up about 22mm

does anyone have any ideas how to get a good seal?

Hi I am having a dilema

I have this drain:

The shortend section screws on to the base but is of a different countries orgin and is made of stainless . I need to make a brass interface to this and wonder if i cut it shorter to the tube i would have better luck with a seal?

Edited By Martin Newbold on 04/03/2018 12:35:36

Cobalt drills are capable of drilling harder material . I have had some experiance drilling stainless steel with them , however with regular use the will become blunt very quickly and either need replacement or to be sharpened. The most imortant thing is to not buy coated drills or tipped as you cannot resharpen them.

AM still reading ths thread with interest and thank you for all the information. I notice this is al beeing done with plastics. But read some talk of aluminium. I am aware of hot flame guns which spray aluminium but am unsure if there is a head available which would work in the same way as the plastic systems , Are these aluminium printeres operational how do the heads work please?

Thanks Neil I presume the G-Code is for controller board for the the stepper motor control and heating nozzle and feed guides. here are new pretty neat microprocessor boards out there now at around £30.00 that are well featured and being used in all types of humonoid/Robot builds. i wonder if they could be used here . I notice there seems to be a lot of problems being addressed with the hardware requiring further purchases THe gearing and basic parts shown in images here dont seem to beyond most of the steam modelers here. I have to wonder if you are all buying a kit anyway ?

If this G-Code is as i have suggested then you must have some transfer software to move the vector object points and steps to next point  in to motor drive steps in G-Code?

Martin

Edited By Martin Newbold on 21/12/2017 18:23:27

Hi everyone interesting thread on 3d printing having read it am suprised looking at the kits that no one is making a printer from scratch as the most complicated part requires a plasma cut plate i cant see why this is not being done am I missing the compexities. I am presuming the heads are available as is the stepper motors .

I am unfamiliar with the cad software but have done modeling work. I notice blender has been noted and is good software for virtual models in the gaming world . However the windows compatibility with familiar control sets is missing. The main reason fail with blender is the double edged learning you are pushed to learn a new command set whilst you learn vector based manipulation of objects. The basis of these objects is either a vertex object or a spline object which starts a process of you being able to manipulate the objects your build in either environment. I am not suggesting Blender or any other virtual modeling system is easy to use . There are others which are more windows compliant. There are some very good instruction videos on Youtube . I would suggest anyone interested in modeling make one of these models on Youtube step by step. This is the fastest method to learn , however you will need to spend a lot of time with it. Modeling on these systems is usually the manipulation of primative shapes thats can be then changed and added together to make a whole model. The most important thing is look at your object that you are trying to build and break it down into simple shapes. i hope this helps with your frustration over blender. Do these printers suppor .*dae or *obj format files?

Martin

Have found some nitride sheet and going to cut a gasket out of it

Martin

Hi David,

Having read all this data it seems you are correct Flourosilicone seems pretty good at most types of sealing solutions for a chemical barrier too. Thanks for putting me on the right path

Martin

this is a brilliant resourse : **LINK** http://mykin.com/rubber-chemical-resistance-chart

It shows all types of rubber and silicons and how they fair under differant chemicals . I am considering buying a sheet and cutting out middle to make a proper gasket

Edited By Martin Newbold on 20/12/2017 21:35:36

I also found this https://www.ramgaskets.com/chemical-compatibility-and-resistance