King Midas mill conversion

[diy-john]

changed the end bearing surface from 7mm to 9mm

That is a sweet picture Jonathan. Good point that 9mm.

10mm for the bearing, 10mm for the nut, say 1mm protruding, 21mm total.

Final versions of X, Y, Z -axis screw are like this (changed according to Robin's / Jonathan's comments)
- X-axis:::


- Y-axis:::


- Z-axis:::




Revised shopping list is here. A couple of notes about that
1) Power supply perhaps is slightly undersize. Thought to trial and see.
2) Need two (2) of the Nema 23 -motors WITHOUT the rear shaft
- Need one (1) --------------//----------------- WITH the rear shaft (Z-axis, will attach hand wheel there)
3) Items 12, 14 -- 19 not sure where to source from, have not found yet
4) Bearing housings / fittings ---> DIY ?

ITEM NO.	Item			QTY
1	Nema 23 stepper motor, 3Nm (425 Oz-in)	Zappautomation	http://www.zappautomation.co.uk/sy60...cPath=9_159_42	2
	Nema 23 stepper motor, 3Nm (425 Oz-in)	Zappautomation		1
2	PM752 Microstepping Driver	Zappautomation	http://www.zappautomation.co.uk/pm75...ml?cPath=9_3_4	3
3	Power supply / PS705 - 75V DC at 0A & 68V DC at 5A	Zappautomation	http://www.zappautomation.co.uk/sps705-p-587.html	1
4	X-axis R 1605 ballscrew 853 mm (not machined)	Zappautomation	http://www.zappautomation.co.uk/r160...crew-p-93.html	1
5	Y-axis R- 1605 ballscrew 508 mm (not machined)	Zappautomation	http://www.zappautomation.co.uk/r160...crew-p-93.html	1
6	Z-axis R 1605 ballscrew 259 mm (not machined)	Zappautomation	http://www.zappautomation.co.uk/r160...crew-p-93.html	1
7	Ball nut R1605T3-FDID	Zappautomation	http://www.zappautomation.co.uk/prod...roducts_id=574	3
8	Ball screws machining	Jonathan		3
9	Pulleys, larger around 70mm diameter, 21T5/44-0	Zappautomation	http://www.zappautomation.co.uk/sync...Path=14_72_153	3
10	Pulleys, smaller around 35mm diameter, 21T5/22-2	Zappautomation	http://www.zappautomation.co.uk/sync...Path=14_72_153	3
11	Belts, 3 for the pulleys (10mm)	Zappautomation	Ask Gary	3
12	Angular Ball Bearings 7201B -type	Local bearing shop	http://www.vxb.com/page/bearings/PROD/Kit1085	6
13	Belleville washer	Robin		6
14	E-stop switch	TBD (to be decided)
15	Limit switches	TBD
16	Connectors for stepper motors	TBD
17	4-Core CY, 1.5mm^2 cable	TBD
18	Sleeves for handwheels	TBD		2
19	Handwheels	TBD		3

Think this should be pretty good now. (until someone points out inconsistencies )