I am working on my first build. It will be a JGRO-based machine. It will be used for hobby work in wood and plastic. Reasonable performance in terms of accuracy and precision as well as speed is desired with speed being the least important. It’s a hobby machine, not production. I’d like a reasonably nice machine but am trying to keep costs reasonable as well.
Spindle will be either a Bosch Colt palm router or Porter-Cable 690 or similar.
I’m in the process of preparing the MDF and want to get the mechanical and electrical parts ordered. Following is my shopping list with a few questions. I’m interested in any input on this list of parts.
Lead Screws
I’m thinking about 1/2-10 (single start) General Purpose ACME rods from McMaster-Carr. Is there any real reason to go with two start? If I understand correctly it’s essentially for speed. If speed isn’t that critical is there any other reason to go with two (or more) start?
Anti-backlash nuts
I’m looking at dumpsterCNC anti-backlash nuts (AC12101-LN.)
Bearings
I’m looking at the 30 bearing pack from Product - Ball Bearings for Lead Screws and Linear Motion. This pack gets you all of the bearing for the axes plus two for each lead screw.
Motors and electronics
I’m considering one of these packages:
HobbyCNC Pro base - $250 (HobbyCNC PRO Driver Board Packages | HobbyCNC)
Plus $30 for 305oz-in motors
Plus $60 for transformer
Plus $37 for case
Total: $377
or
FineLine Automation (3 Axis Electronics Kit : Fine Line Automation)
3 axis kit - $519
(48 V. 7.3A switching power supply, Gecko 450 4 axis driver, 3 – NEMA 23 380 oz-in motors, cables)
I’m leaning toward the FineLine kit. I have no problem building the HobbyCNC system. From the specs it appears that the FineLine system is a nicer system. Setting aside build time, is it worth the extra roughly $140 for the FineLine package over the HobbyCNC? Is it overkill for my machine?
Any other choices I should consider?
Thanks,
Tim