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Member postings for chris mcnicoll

Here is a list of all the postings chris mcnicoll has made in our forums. Click on a thread name to jump to the thread.

Thread: Fusion 360 Whitworth Threads
22/01/2021 15:26:44
Posted by Steamer1915 on 22/01/2021 09:53:46:

Hi Chris,

Could you send me a PM please?

Best regards,

Steve.

PM sent Steve, many thanks

22/01/2021 05:19:56
Posted by Steamer1915 on 20/07/2020 11:51:20:

Mike,

I have found the XML document for the BSW threads. Not sure if this works for BSF as well, the thread form being the same, just the difference in TPI. I don't know how to upload them here but I have your email address and will send you them that way, along with the BSP+Nonstandard Threads file. Not sure what's in the latter without checking.

How to upload an XML document to this site? Anyone?

Best regards,

Steve.

hi steve is it possible to get this file from you please?

many thanks

chris

Thread: xyz pro3000 with prototrak mx2
17/07/2020 07:35:52

hi there, i am looking at getting a new to me mill which has the prototrak mx2 fitted, i see these are floppy drive based. im new to the cnc side so my question is can i make my design on my pc in say solidworks etc and get the program onto the prototrak?
forgive my newbie question but we all gotta start somewhere right?

thanks
chris

Thread: elliot omnimill convert to cnc?
10/07/2020 16:34:47
Posted by JasonB on 10/07/2020 16:20:02:

No, something to counter the weight of the table. A lot of the mills with moving heads have a gas strut or spring so the motor does not have to lift all the weight. Your table is quite likely to be heavier than a typical mill head so need more counterbalance.

ah, i think i get it now so @JasonB. put a strut underneath that is closed so it will help push the table upwards as the motor trys to lift it?

thanks for all the help

10/07/2020 14:23:34
Posted by John Hilton on 09/07/2020 21:58:06:

I have converted a couple of mills to CNC.

Nema 34 is probably the size to use, but you need a high torque motor as they have to hold the work as well as move it.

I would get ball screws and fit them.

I would drive the 3 axis indirectly, with a timing belt on pulleys between the motors and the lead screws.

My first conversion had a top speed of about 1500 rpm, and to be honest this was perfectly ok with hss tools.

To operate I recommend Mach3 or mach4.

For the saddle I suggest you rig up a counter balance to take the weight off. A spring or weight over a pulley would do the trick. Maybe even an old car spring?

Good luck. It looks a useful mill.

John

thanks john, by counter balance im taking it you mean at the oposite end to where i would fit the motor?

thakns

chris

09/07/2020 20:14:05

so are we thinking nema 34 would be strong enough? **LINK**

09/07/2020 18:23:30
Posted by JasonB on 09/07/2020 18:16:42:

Would be worth trying to up the spindle speed if you do it otherwise it could take a long time to run any code

Ok, how would I go about that? Faster motor? It’s on belts and pulleys and belts so I can speed up quite a bit.
thanks

09/07/2020 17:02:29

img_2216.jpghi there, has anyone converted a similar mill to mine before? im looking for info as to what,where,when and how if anyone can advise. thanks

img_2215.jpg

Thread: clarkson autolock 3mt
05/04/2020 16:08:16

afternoon all, i have a clarkson autolock with 3mt that i use on my Elliott Omnimill, its the smaller model but i could do been able to use some bigger cutters etc, ive seen a few used ones on ebay etc but all have the wrong arbour, is there any other way of being able to use biggers cutters? can you get an adaptor that goes from 3mt to 40int ??

thanks

chris

Thread: metric thread on my imperial lathe
29/02/2020 21:27:53
Posted by Bazyle on 29/02/2020 21:14:34:

50/80/40/127

There are only 3 shafts for gears to go on, or do I double gears up on the middle?

29/02/2020 13:06:26

Hi john, it’s all above but here it is my friend

harrison l2

imperial lathe

4tpi leadscrew

20, 40, 50, 55, 60, 60,80,127

24/02/2020 09:16:32

morning folks, sorry for dragging up my old thread but i need to cut a 1.25 pitch thread now and ive lost the screwcutting book somewhere.

any help would be great, thanks

chris

08/05/2017 20:19:19

That handle sounds like hard work

Thread: Grinding wheels
02/05/2017 08:48:52

hello folks, I need some wheels for my bench grinder for sharpening lathe tools etc, what grade grit wheels would you recommend?

Cheers

Chris

Thread: metric thread on my imperial lathe
30/04/2017 07:06:34

Right then I had a few practice runs and checked the thread is 1.5 I've done rh and lh passes on the scrap material, but now I need to get the threads cut correctly, my motor doesn't run backwards and there is no reverse gear on the box.

What is the easiest way for me to make sure I get back into the correct start of the thread? Tipex on the gears to align them maybe?

29/04/2017 11:45:53

stuck it in A and im getting 1.5

thank you everyone for your help.

29/04/2017 10:51:09

img_9559.jpg

29/04/2017 10:46:07

just going to check this.

reading elsewhere someone has said that i need to have the carriage on an angle?

i have had my 60 degree tool set square to the chuck??

chris

29/04/2017 10:12:35

ive put 60 on top,50 in middle and 127 on bottom with gearbox C thats not a 1.5 thread.

i will try gearbox in another gear

28/04/2017 13:06:56

Cheers I'll be busy trying Tomorrow morning

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