X2 CNC Conversion
#11
I'd naturally like to have more resolution, but there were problems with movement and accuracy. The lower resolution makes it run properly. It's n ot for production, so that will be fine.
Mike

If you can't get one, make one.

Hawkeye, proud to be a member of MetalworkingFun Forum since Jan 2013.
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#12
how big are your motors, I have one I been working on for a while now still a ways away for getting it to cut anything but getting there.
dallen, proud to be a member of MetalworkingFun Forum since Apr 2012.

If life seems normal, your not going fast enough! Tongue
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#13
The motors are NEMA 34 with 878 oz/in. of torque. They are WAY stronger than needed for an X2. I think most use NEMA 23 motors for this size.

Last night, I wondered why the Z-axis seemed to be a bit twitchy. Turned out I had tightened the gib lock. The motor still moved it, but the ballnut bracket was flexing a bit. Like I say, very powerful.
Mike

If you can't get one, make one.

Hawkeye, proud to be a member of MetalworkingFun Forum since Jan 2013.
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#14
After my house fire a couple of years ago, I thought I had the little CNC running again, with a treadmill motor as a replacement for the seized motor and dead controller. Then it started getting really inaccurate and unreliable. I tried all sorts of things to no avail, then finally gave up.

More recently, I built a 3D printer, which has yet to become useful. In the early going, the Y-axis stepper was really jerky and useless. That turned out to be a loose connection on the stepper cable.

Today, I finally got around to applying that info to the CNC mill. I found a loose wire on the X-axis cable. My mill is back! Right now, I'm setting it up to cut a foam plug for a cast aluminum cover for the oil filter on my Aspencade. After the fire they threw away the hot-wire attachment I had made before, so I had made another one.

So, if you've got jittery steppers, it could be settings, but it might be as simple as a bad connection. Go over them like you expect to find one.
Mike

If you can't get one, make one.

Hawkeye, proud to be a member of MetalworkingFun Forum since Jan 2013.
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