Thanks for the reply, they are drv8825s rated for 3amps if that helps
Edit: 2.5 amps
Hey all,
I got my my leadscrew. Have you needed to trim? Mine is truly 300 mm, but it seems too long.
I got some of those driving motors in series from my old lowrider which used to be my old mpcnc soon to be primo build. No sweat.
That really depends on your dimensions. Recommended z max ends up with 131mm leadscrew.
1 Like
The Primo looks great, but I’m pretty happy with my Burly and wondering if there’s a compelling reason to upgrade other than “because I can” 
Are the improvements mainly around calibration and ease of assembly or are there visible improvements in cutting speed/quality?
Thanks, Mat, I’ll need to trim.
1 Like
This is excellent news, thanks
1 Like
Define “compelling”
4 Likes
There are good examples. Last few pages.
1 Like
What is the feed rate on that cut?
17mm/s
12.5mm Depth Of Cut
Single Flute Upcut
1 Like
As far as I am aware Ryan’s main intentions were to increase “Rigidity” but he definitely made improvements in other areas. As you mentioned ease of use and assembly but also cosmetics. I think the Primo is a beautiful machine and i can’t wait to finish my build.
4 Likes
Printed parts are live.
7 Likes
Nice. Looks like the picture is missing a pair of Core clamps though. I only see 2 out of the 4 of them.
The gantry clamps are stacked. The 4 Z core clamps are blue.
First attempt successful core. All parts printed on ender 3 with no fails.
Took 44hours but it’s done
7 Likes
Gotcha. Couldn’t tell in that dark filament.
The drivers are constant current, so as long as you can provide that current with the voltage you have, it will not care what the input voltage is. When you go faster, the motors resist the current, and at some point, you will not be able to reach the set current from the driver with that voltage. Luckily for us, we want to travel at high speeds, but we cut at slow speeds. So you won’t care.
Series >> parallel.
5 drivers > 3 in series, but not by a ton.
1 Like
What is the terminology for having the bit “orbital” drill down to depth and …then… proceed to “cut” the shape out.?