Hybrid View
-
10-03-2021 #1
Yes, though it's not 100% complete yet, the mechanicals are done and I've got the motors spinning in the bench but I've not put it all together yet.
Also, I went with these massive 8Nm Nema 34 steppers that a friend donated and the mounts are made are massive so I'm already planning Mk2 !
Yes you can push the nuts forward to gain space and you'll get more space on the underside, but you don't gain any headroom.
Another thought: if you're planning to offset the stepper, on Y you'll need to offset upwards as there's no space to go sideways, you've got maybe 80mm width until you hit the dovetails.
I'm currently modelling a homebrew double nut 1204 solution:
In theory the length will end up being 74-77mm so would need extra space on the Y.
It's not ideal, but it's not too horrific. You'll need to take the nuts apart to clean them after grinding - daunting if you've never done it but there are vids out there and all you need is grease get the balls to stay in place as you load them back in.
-
10-03-2021 #2
That sounds good...
Maybe it won't be so critical to offset the Y in that case as I'll be losing the power feed from the end and all the space it takes up. I could retain the pulley drive and have the stepper on the same plane but just offset it towards the rear a bit, losing one of the pulley thicknesses from the equation.
I might have to draw my ideas up in Fusion tonight, I have the saddle modelled up already and a picture speaks more words after all, but then I might just measure up again get the screws ordered and take it from there.
-
25-04-2021 #3
All the ball screws, nuts and pulleys arrived in pretty short order from Fred at BST. He was exceedingly helpful with my questions, raised issues I hadn't foreseen and coped with my hand drawn diagrams admirably.
I got given a really nice control box donated from a friend, unfortunately I'm having trouble uploading the photo, I'll try again later in the build when it's been repopulated with shiny stuff. I'll post a list of the hardware I've bought for the control side at the same time.
I've been milling out the X and Y ballnut holders from the old brass acme leadscrew nuts. The Y nut was clocked from the front of the table as being 0.002" out of square so compensated for this in the vice on the mill then faced and bored the ballnut hole and bolt holes. I ran into some problems in the process on the second mount as evidenced in the photos below. I had a cutter slip in the collet which accounts for some of the problem, the other marks in the bore are a result of the previous threading showing through but the final mounting hole is true and the otherwise ready to start the fitting of the ball screws.
I will get a good bit of extra table travel in the Y axis towards the column as dazp1976 says above on his similar machine.
On final disassembly of the old Z axis bits I found that the damper had long since given up the ghost - I wonder whether to get another or just rely on the power of the stepper?
-
07-01-2022 #4
Hi All,
Trust you all had a safe and good festive period.
I've spent a vast amount of time getting to grips with Fusion 360 and been modelling up as much of the X3 as possible with as much accuracy as I reckon I need. Link to fusion design here https://a360.co/3EeD874.
I also spent a large amount of time in the shed making my Y axis stepper mount plate, much swarf, many broken cutters from trying to get used to machining with a flexible machine and a low powered router head. (BOXZY robot)
So here it is, my Y axis plate with stepper mounted at the rear so that it doesn't stick out the front too far and take up too much room in what is already a small space.
Any suggestions for good pulleys and belt to stop backlash before it gets introduced much appreciated - I've seen mentions of HTD5 and am thinking 15mm with 18 tooth pulleys.
Cheers all.
Last edited by CNCMEBABY; 07-01-2022 at 01:04 AM. Reason: Added link to Fusion model
Thread Information
Users Browsing this Thread
There are currently 2 users browsing this thread. (0 members and 2 guests)
Similar Threads
-
Warco WM18 or WM16B
By hedeon in forum Milling Machines, Builds & ConversionsReplies: 8Last Post: 25-08-2021, 12:44 PM -
CONVERSION: Warco WM18 Mill Stepper motor advice
By Gotty101 in forum Conversion Build LogsReplies: 7Last Post: 18-08-2018, 05:06 PM -
Siege sx3 or Marco wm18
By terry1956 in forum Machine DiscussionReplies: 3Last Post: 09-02-2017, 12:02 AM -
Super sieg x3 conversions
By dazza in forum Milling Machines, Builds & ConversionsReplies: 2Last Post: 19-02-2014, 10:28 AM -
Wabeco F1410LF vs Warco WM18 vs Sieg X3
By abfa9358 in forum Milling Machines, Builds & ConversionsReplies: 4Last Post: 02-08-2009, 08:23 AM
Bookmarks