SMALL - espritmodel.com SMALL - Telemetry SMALL - Radio
Reply
Thread Tools
Old Oct 31, 2012, 04:55 AM
ReVolt- Proprietary Insanity
geostomp's Avatar
United States, MI, Wixom
Joined Sep 2007
1,593 Posts
Quote:
Originally Posted by Taget View Post
This looks great. I really want to get into CNC but most of the prices have been cost prohibitive. what are your thoughts on this for a newcomer ?
Yeah if the money isn't there, then success will he hard. But if your handy, you could get going and save some money. It helps to have saws, drills, bits, a square, angle grinder, etc...


I bought some steppers from mpja.com, and drives (cw250) from circuitspecialists.com, a power supply from Ebay. And I built my new table for a few hundred.

Even a Bluumax and a copy of Mach3 will set you back $650. There is a lot of info on doing CNC for cheap on CNCZONE.com. Problem is a few more hundred dollars always gets better performance, so you always want to spend a few more hundred. Search cnc cookbook for basic cnc knowledge.
geostomp is offline Find More Posts by geostomp
RCG Plus Member
Reply With Quote
Sign up now
to remove ads between posts
Old Oct 31, 2012, 08:43 AM
low tech high tech
vtdiy's Avatar
Southern Vermont
Joined Feb 2007
3,028 Posts
Quote:
Originally Posted by geostomp View Post
Even a Bluumax and a copy of Mach3 will set you back $650.
I use TurboCNC, which is free. Not as nice as Mach3, but will certainly get the job done.

If you like to build things, HobbyCNC.com packages will get you the electronics and steppers with more torque than the Bluumax. A scrounged computer power supply can drive it.

If you go the usual homebuilt route, skateboard bearings and some metal, threaded rod and wood will get you a basic machine that will drive a Dremel or equivalent, and is expandable.

Probably $400 or so using TurboCNC.
vtdiy is offline Find More Posts by vtdiy
Reply With Quote
Old Nov 04, 2012, 04:12 PM
Registered User
United States, CO, Golden
Joined Aug 2011
431 Posts
Subscribed. I've been eying the Bluumax. I am looking at what you have done and am trying to piece together in my mind what would be the best investment. I am curious if I should get the package with no electronics, and get upgraded drivers and steppers right off the bat. I have seen numerous mods for stiffening the gantry. Perhaps it's just worth it, for the cost.

One mod that would seem important given the design, would be a skirt of some sort to keep shavings and crud off the lower rails.
Rifraf is offline Find More Posts by Rifraf
Reply With Quote
Old Nov 05, 2012, 04:42 AM
ReVolt- Proprietary Insanity
geostomp's Avatar
United States, MI, Wixom
Joined Sep 2007
1,593 Posts
For me, it was a great machine for instant success. But it is not a one size fits all. I learned the basics with a working machine on my table (Bluumax) which made it fun. If I knew then what I know now I would have built my machine. That is not to discredit the Bluu', I just would have had a hard time building one at the time without loosing some hair.

One of the biggest sources of backlash is the motors themselves. The motor shaft will move radially under enough pressure. I had this problem even with my new upgrade motors on my upgrade machine.

On my new machine, I took the motors apart and removed a spring washer and replaced it with rings of heavy card stock. I used just the right amount to pretension the motor bearings and now I have eliminated that backlash.
geostomp is offline Find More Posts by geostomp
RCG Plus Member
Last edited by geostomp; Nov 05, 2012 at 04:53 AM.
Reply With Quote
Old Nov 05, 2012, 04:58 AM
ReVolt- Proprietary Insanity
geostomp's Avatar
United States, MI, Wixom
Joined Sep 2007
1,593 Posts
Here I am working on my new jet with my upgrade CNC.

ReVolt R/C Jet Development (0 min 45 sec)
geostomp is offline Find More Posts by geostomp
RCG Plus Member
Reply With Quote
Old Nov 05, 2012, 06:44 AM
low tech high tech
vtdiy's Avatar
Southern Vermont
Joined Feb 2007
3,028 Posts
Quote:
Originally Posted by geostomp View Post
On my new machine, I took the motors apart and removed a spring washer and replaced it with rings of heavy card stock. I used just the right amount to pretension the motor bearings and now I have eliminated that backlash.
Wow. Hard core DIY!
vtdiy is offline Find More Posts by vtdiy
Reply With Quote
Old Nov 05, 2012, 12:54 PM
Registered User
United States, CO, Golden
Joined Aug 2011
431 Posts
I just picked up a controller, power supply and 3 NEMA 23 280 oz motors from A Quick CNC on eBay. Looks like they are a kick starter group. They also have a funded building system of a full Z axis and building blocks for the rest of the table, but I am not sure they are going to be available any time soon. I like the idea of linear bearings and rails instead of skate bearings on tube. For that reason, I am leaning slightly toward the Fireball V90, or seeing if I can build some of it myself.
Rifraf is offline Find More Posts by Rifraf
Reply With Quote
Old Nov 05, 2012, 05:26 PM
ReVolt- Proprietary Insanity
geostomp's Avatar
United States, MI, Wixom
Joined Sep 2007
1,593 Posts
Quote:
Originally Posted by Rifraf View Post
I just picked up a controller, power supply and 3 NEMA 23 280 oz motors from A Quick CNC on eBay. Looks like they are a kick starter group. They also have a funded building system of a full Z axis and building blocks for the rest of the table, but I am not sure they are going to be available any time soon. I like the idea of linear bearings and rails instead of skate bearings on tube. For that reason, I am leaning slightly toward the Fireball V90, or seeing if I can build some of it myself.
I ordered from aquickcnc myself as well. Great to deal with and a neat selection. Yeah, sounds like your off to a good start.
geostomp is offline Find More Posts by geostomp
RCG Plus Member
Reply With Quote
Old Nov 17, 2012, 08:25 AM
Registered User
Taget's Avatar
United States, MI, Marquette
Joined Dec 2010
208 Posts
I pulled the trigger on a Bluumax machine. Almost ready to test everything out.
Taget is offline Find More Posts by Taget
Reply With Quote
Old Nov 18, 2012, 07:59 AM
ReVolt- Proprietary Insanity
geostomp's Avatar
United States, MI, Wixom
Joined Sep 2007
1,593 Posts
Quote:
Originally Posted by Taget View Post
I pulled the trigger on a Bluumax machine. Almost ready to test everything out.
Awesome, great to see another Bluumax in this thread. I would suggest .020" depth of cut (stepdown), .050" stepover(offset of next pass), and about 20-30 ipm feedrate on a 1/8" endmill. That will ensure the cutter doesn't bite more than it can chew. A carbide endmill will help a bunch.
geostomp is offline Find More Posts by geostomp
RCG Plus Member
Reply With Quote
Old Nov 18, 2012, 03:25 PM
Registered User
Dallas, TX
Joined Jan 2005
2,169 Posts
I received a Bluumax last week. Might be a while before it is all together but sure looks like alot of fun!

Alan
jh2rc97 is offline Find More Posts by jh2rc97
Reply With Quote
Old Nov 18, 2012, 03:31 PM
ReVolt- Proprietary Insanity
geostomp's Avatar
United States, MI, Wixom
Joined Sep 2007
1,593 Posts
Quote:
Originally Posted by jh2rc97 View Post
I received a Bluumax last week. Might be a while before it is all together but sure looks like alot of fun!

Alan
Cool! Can't wait to see what you do with it.
geostomp is offline Find More Posts by geostomp
RCG Plus Member
Reply With Quote
Old Nov 19, 2012, 04:22 PM
Registered User
Taget's Avatar
United States, MI, Marquette
Joined Dec 2010
208 Posts
Assembly and getting everything wired and working was a snap. Running a cnc system is not there is deffinately a learning curve and im trying to digest alot of what i have read and been trying with mine. So far i have managed to draw a spiral and a snowflake from pre canned sample g-code and one peice i made in sketch up. For a first time machinist i think that all of these home cnc router kits should come with sharpie attachment, much safer

All in all im really diggin it. Once i get my skills up and gain some confidence i will attach the dremel.
Taget is offline Find More Posts by Taget
Reply With Quote
Old Nov 20, 2012, 07:12 AM
ReVolt- Proprietary Insanity
geostomp's Avatar
United States, MI, Wixom
Joined Sep 2007
1,593 Posts
That's the way to do it.
geostomp is offline Find More Posts by geostomp
RCG Plus Member
Reply With Quote
Old Nov 22, 2012, 06:22 PM
Registered User
Taget's Avatar
United States, MI, Marquette
Joined Dec 2010
208 Posts
Still getting the hang of this machine. Had the machine draw a few gears and a rough attempt at Mickey Mouse, at the kids request. The more i use it the more my comfort level increases.

Added home switches to my machine on all axis. One is a lever switch from Radioshack and the other 2 switches are reclaimed power switches from computer cases. Cheap fix but needed to add software debounce to make up for the low quality of the switch.

Who else is using LinuxCNC(emc2)? I am a big fan of open source software. I am really glad i found this thread, as i had never come across this machine until then.

Cheers
Taget is offline Find More Posts by Taget
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Build Log "done by ourself" cnc router and hotwire cutter.now with video. clausxpf CAD/CAM 23 Jan 05, 2013 05:58 PM
Question CNC router Kit ? marcel76 The Builders Workshop 6 Feb 21, 2009 04:50 PM
Found Allegro UCN5804b stepper controller chips for cnc router or foam cutting stealthy Aircraft - General - Miscellaneous (FS/W) 0 Feb 05, 2006 08:46 PM
CNC router kit choice? Coder The Builders Workshop 3 Oct 15, 2002 08:45 PM