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Sigh... Its with much deflation and disappointment that I report that while the stepper is definitely running better/stronger on 48v, I still can't get it to work in full-step mode, and its still...

@109jb - you're right - a large RC servo could potentially work. I've been a little reluctant to go down that path, as the output shafts on even the large servos are surprisingly small, so I worry a...

Yes, I'd looked into cruise control actuators early-on, but none of them allowed the manual override capability - they all seemed designed to take over throttle completely, and to allow adding *more*...

Yes, you've hit it exactly - this is essentially a very sensitive cruise control (for a boat), to be used over a fairly narrow range of throttle movement. While the full range of linear motion is...

@jim-dawson - I'd tried using a linear servo previously, but was not able to get the speed or power that I needed to have responsive and accurate/repeatable positioning. (Granted, it was not an...

Thanks for the replies and suggestions!

In answer to the question of 'how fine of a step do you need?' - full-step might work, but I can't get the current combo of driver and stepper to reliably...

I have a 570 oz-in bipolar stepper motor (4 wire). I'm driving it through a SainSmart ST-4045-A1 driver. The stepper is pulling loads varying from 6-12 lbs, and movement is done via a 1" spindle that...

I have a cable-driven mechanism that consists of a spindle on a stepper motor shaft. A flexible metal cable is wrapped around the spindle, and runs through a sheath (bicycle cable style) to the...

Bob - Thanks a BUNCH for that very cogent response. That is a great education, just reading that! :-)

Starting w/ the holes and only going part-way through from the non-slotted side is genius - I...

BAMCNC - yes, that is similar to what I sort of had in mind. One raised edge to act as the 'Y stop' for the work piece, but the opposite side being some type of side-clamping arrangement that will...

Bob - what is the rationale behind continuing to create blanks on the bandsaw, vs parting the pieces on the mill? (This isn't a challenge, merely trying to understand the overall thinking.) I had...

No problem - Thanks for the response!

Please see the attached images.

This is made from 1/4x1" 1018 bar stock. The sides are not machined. The two faces are finished with a fly cutter, then...

I've been making a particular part, one at a time, in my screwless vise on my Taig cnc mill for several months now. I've made 100's of the parts, so the process for making the part itself is well...

The 270 oz-in Keling arrived, and I've got it hooked up. Temperature is running 10-15 degrees cooler than the 425 oz-in, but still much hotter than the others. 125-130 degrees isn't particularly...

Well, my curiosity was enough to cause me to run down to the hardware store and buy an IR thermometer. :-)

After being on for over 3 hours, with a good bit of use during that time, the highest...

Just an update - I got a 48v supply and the Z axis speed has improved dramatically (something around 4-fold, without any rewiring - still running bipolar series). My X and Y are pegged at what EMC...

I have just replaced my venerable (but recently deceased) Xylotex with a G540, and even just based on my axis jogging and calibration tests thus far, am very pleased with the G540! (faster, smoother,...

Oops, sorry, didn't get this until now (back at work, of course :-) I'll reply with latency numbers this evening.

On the 'up and running' comment - I mean just the PC itself, without the emc/axis...

I've got emc up and running under the 10.04 distribution. It is running well enough (I use the mill several hours most days), but I'm occasionally getting an rtapi error, and if I don't have emc...

I purchased a 3/8" end mill holder from Little Machine Shop some time ago (which I've been very happy w/ btw!) and have been using that with single-ended endmills for a while. I purchased some...

Heh heh, well FWIW - it makes me feel pretty bloody smart just by association! :-)

Seriously though - those are the kind of insights that help us noobs out immensely. I've stared at my share of...

Ok, armed with the education from this thread, and with a new 5/32" end mill (the largest I have left at this moment), I went at the demon steel with my Taig again last night.

This time, I used...

Perfesser Mcgyver, thinking this stuff through a bit more, and just want to be sure I understand the point about the feed rate.

You say the feed rate should be ".0005 - .002 thou per tooth" - by...

wisp - double-checked, and the spindle is running the right direction - something really screwy would have had to have happened to reverse suddenly though, as its cut very nicely prior to this...

BTW, mystery metal concerns aside, I fully suspect my end mill and my lack of general knowledge in this problem. The stuff cut quite easily with a hacksaw, so there clearly weren't any chunks of...

I'll have to double-check my rpms and feed rates this evening, but I believe that my little chart said I should use position "D" for a 3/16" 2-flute end mill. (D is 2900 rpm on the CR machine, I...

My Noobness is undoubtedly at work here, but I'm hoping that someone wiser can clue me in to what's happening.

I picked up what appeared to be some soft-ish steel at Home Depot the other day. The...

pdxalz - Thanks for the good news on the Kool Mist 77 - I'll worry a bit less now!

Is your setup a fully-enclosed enclosure? (sides, top, bottom - the whole deal) I'm considering building a...

Hey, that's pretty cool. That exact setup wouldn't work for me, as I use my t-slots on my mill table for holding/fixturing, but that would certainly keep the wet stuff pretty well contained.

I'm...

Just an update to all those who offered advice on the compressor box.

Built one w/ my kids this weekend. Ended up going with 5/8" particleboard due to availability and price. (Man is that stuff...