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eurikain
25-06-2015, 08:46 PM
Hi,


It has been for a few years in my thoughts, and is finally coming a reality ! I migrated from cmc-zone to here because I heard you guys like steel builds :)


I am planning on making a steel build. I join to this post the Sketchup model, hoping that you can give me your thoughts on it and help me improve the design before I start buying parts and building.


So far, I am thinking:
- 12x12cm beams on the side
- 10x20cm gantry beam
- SBR20UU on X,Y,Z
- rack and pinion on X,Y
- leadscrew on Z
- 2.2kw chinese water cooled spindle with VFD


I already own (from a previously failed MDF build based on buildyourcnc.com's tutorials):
- 3 x Nema 23 425oz
- 3 x Stepper Drivers CW230
- Power Supply 36V 9.7A
- 6 x limit switches
- 5 Axis Controller with parallel port
- PC with parallel port
- Mach 3
- E-STOP
- Bunch of electrical cable


I am looking forward for your advice !


Cheers,
Eurikain.


PS: I can't weld, but I have access to a welder shop that will do the work for me. I could learn, though :)

Blackrat
26-06-2015, 09:48 AM
you only need 3 limit switches :D

eurikain
26-06-2015, 09:51 AM
you only need 3 limit switches :D
You need two limit switches per axis, one for each end of the axis.

Blackrat
26-06-2015, 10:17 AM
or you can put the switch on the moving part and have two stops ;-)

eurikain
27-06-2015, 09:25 AM
or you can put the switch on the moving part and have two stops ;-)

Hmm, right, but they are one direction switches, so such a placement would require a mechanism for translating bi-directional pressure to one directional.