On to CNC #2 5'x4' Foot Print

[planekrazie]

I told my self after the 1st one that I would not build another pretty good size one But.... I sold my 1st one and been without one for a few months now. So.. Its on to number 2. I have some photos of the frame so far.
Tell me what ya think.
Steve

[magick_man]

Looks pretty good.
What size is that steel tubing?
I am looking at doing a similar base for my machine.
But I am not sure how thick I need to go on the steel.

[planekrazie]

2"x2" I believe is is 14 awg. The cross braces in the center of the frame is 2x2 angle. Some I had around the shop.
Post some pics when you start yours.
Thanks for the compliments
Steve

[planekrazie]

Just got in my new Hobbycnc pro kit with 305 oz steppers. Everything looks to be there. This is my 5th kit so far. ( 3 for me and 2 for other members )
You cant beat hobbycncs prices. Great kit and fast deliverys.
Steve

[planekrazie]

Boy I hit the jackpot Saturday. I picked up 4 8 foot linear rails with 8 trucks and about 30 foot of energy chain for 150.00 at the local scrap yard. They have a big warehouse loaded with old surplus machines that were sold for scrap. I was looking around and came across the rails. It took me about 6 hours to remove from machine but it was well worth it. Also I installed one of the sets on the router I am building. Here are some pics so far.
Where is a good place for belts and pulleys or should I go with rack and pinion?
Steve

[planekrazie]

Got the basic design of the Y axis done tonight. Been a slow go with working 7 days a week and all. I need to weld all the gussets in place and install the linear bearings. Maby sometime this weekend.
Hope it all works like the last one. We will see.....
Steve

[Switcher]

Your machine looks great.

That's the same size (5'x4') I want to build, all metal no wood.

I'm wanting a 4'x4' working area, with a 1'x4' area for a tool changer.


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[sonicwonder2000]

Your frame looks very attractive all painted blue.

I am a rank amateur when it comes to cnc, but given that you are using expensive linear rails, are you not concerned about the rail support deflecting under the wight of the gantry?? I am creating a similar frame out of uni-strut, but am going to place horizontal members to prevent the rail suppourt from deflecting. Acording to beamboy, with a 60 pound gantry, the deflection can be significant.

[planekrazie]

There will be supports. 3 on each side. I squared up the rails then got the measurements so I can cut to fit.
Steve

[multiplex]

looks great! this is the style i want to us for my next router.

staying tuned

[mrogowski]

Subscribed.

First post, total n00b. Thank you for posting such detailed pictures. This design seems to be straight forward and simple - so far. Right down my alley

I noticed you have your rails on top, while many other designs seem to have them mounted on the sides. Is there a reason for this? Seems to me this would be a better idea...

Best regards,
Mark

[planekrazie]

The reason That I mounted to the top is that it seemed that the bearings liked the weight on top. When I press down they glide like butter. I believe they are pre loaded. Also the specs have them to be top mounted.
Thanks for looking. I am gonna add more pics as I continue to build.
Steve