I have the exact same PSU. Will you please share your printing files? parametric if possible.
My main concern is safety, as I do not have much experience with electrical systems.
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I bought a 500W brushless that just arrived.
The sleeve-design in this post doesn’t quite fit this one, so I need to re-design it to support 55mm diameter and wider screw holes. Is that ok with you @md8n?
The package also contained V-Cutters and Milling Cutters. They range from 0.8mm to 3.175mm and they all have 3.175mm shafts.
I didn’t catch that as I ordered. The only collet that came with the spindle is ER16-10mm.
Anyone with experience that can say how usable they would be with the Maslow?
For milling and engraving smaller parts at slow speeds I guess they could work fine? However, I can’t see them being usable for large format use?
I would need to order new collets if I was to use them anyway.
I have a lot of 8 and 10mm router bits already.
I could order ER16-8 so I can use them also, but is it advisable to go for ER20 and 13mm bits instead?
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Yep, go ahead and remix
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It’s a simple mod to the classic because someone much smarter than I added the support into the firmware. I don’t think the M4 supports it yet.
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Since the inner sleeve has slots that can let air pass along the body of the spindle, I am planning to design a new fan that covers the whole top og the spindle and sleeves. The original “fan” on the spindle I got has straight blades. It will do something to the air around it when it spins, but changing the blades so that they push air into the slots of the inner sleeve would do much more to cool the whole spindle.
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It actually should be just a setting in the maslow.yaml file. FluidNC supports all different types of spindles and lasers and whatnot that can be configured in the maslow.yaml file, no programing needed 
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Report on the Outer Sleeve
So I noticed that there seemed to be more play, than what I would like, between the arms and the outer sleeve.
Today one of the arms was jamming up, so I needed to pull the machine apart to sort it out, and that seemed like an ideal time to check out the outer sleeve as well.
Here’s how it looks
From the top
That ‘dirty’ patch is where the top clamp presses against it.
From the bottom
The compression indicated with the red mark, and that black smudge, was where the bottom clamp, next to the thumb hole, was squeezing in on it.
The yellow mark indicates where the bottom left arm had squeezed it in.
And the green mark indicates where the top right had squeezed it.
This sleeve was made from PLA - so it seems that’s just not strong enough for the task.
Measuring it again I’d say that I made it around 0.8 ~ 1.0 mm smaller than it should have been. ie. the outer diameter.
So I’ve done a fresh version, in PETG, and 0.6mm bigger OD.
M4_SpindleSleeveOuter.stp (42.5 KB)
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Full story over here, for a new dust port - Alternate dust port design - Hardware / Sled - Maslow CNC Forums
But here’s the picture
full M4-RouterBeGone beauty shot in glorious black and “MAKE MY EYES BLEED” Yellow PETG
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This updated wedge is really part of this thread as well. With being able to not have a router comes the option to swap other things in and out, which in turn requires fiddling with the clamps and clamp wedges a lot
Clamp Wedge Just Couldn’t Take It No More - Troubleshooting - Maslow CNC Forums
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And here’s the step file for the clamp wedge. Note that you will need to use your slicing software to pause the 3d print at the correct layer to insert the nut.
ClampWedge.stp (184.9 KB)
Hi @md8n, thank you so much for your designs and for sharing your files.
What are you printing your stp files with? I’m relying on a very helpful friend who has a Prusa but we’re having some trouble with the supports. Did you need to print a lot of the supports and do you have any tips of which orientations of the sleeves will be the best way to print?
Is the outer sleeve printed solid or does it have a honeycomb or such structure?
Thanks very much again and thanks for sharing the improvements that you make.
I’m using a BambuLabs X1 Carbon, with AMS. And I’m using the BambuStudio as my slicer instead of OrcaSlicer.
None of my designs need supports, but they all require reorienting them to put the best side on the bed. Having said that, they may require brims, especially the clamp wedge because it is so small, or they may come out a little meh without the supports, because no support.
So the first thing you should do with them is to reorient them to get the best face down (on the bed).
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thanks for the help.
Hi Lee, sorry to bother you again. I’m attaching my spindle motor to the M4 and I’m wondering how you wired it up. Did you open up the spindle and attach a longer cable or did you just attach another cable to it? How long did you make it?
I noticed that the DC power source for the M4 is just shy of 3 m, so I suppose the DC power for the spindle should be that long. Did you attach the spindle cable to the M4 cable and if so how? I’m thinking of using shrink wrap that’s usually used at the ends of cable for electrical insulation but any other suggestions are very welcome.
On the AC part, I’m planning to wire up a stop button to the power supply for the M4 and the spindle with some mounting for the spindle control knob. Any other suggestions on that side?
Thanks as always for your help. You’ve been great.
Back in this post M4 Router Be Gone (installed the spindle) - #43 by md8n you can see what I did (hopefully) which is to wire up a plug, which I then wrapped in heatshrink for strength. I figured that a reasonably firm plug-socket connection would be sufficient, and it has been.
I have my M4 PSU sitting on the floor immediately underneath the middle of my frame, then ultimately that connects to an extension cord I wired up to the e-stop + distribution box I made, that’s on the side of the frame.
So the cord to the spindle (with the corresponding plug on the end) is long enough to match all of that.
Which brings up the first picture from the original post on this thread
There’s a total of three power leads coming out of that box.
- One goes back to the wall socket (AC)
- Another is the extension lead going to the M4s power box (also AC)
- And finally, the third one going the spindle (DC variable voltage)
Nope, but in usage I think that might be quite a good idea.
Covered this already, except to add, I would definitely recommend doing this. I 3D printed a case for mine, but there’s another picture in this thread of someone else’s solution. Whatever you do, just think electrical safety
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I just ordered this one with an ER11 collet from aliexpress.
Daedalus CNC Brushless Spindle Motor 55mm Diameter ER11 collet 48VDC
After it arrives, I’ll be doing a bit of tinkering to see how it works/get it to work.
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How did it work out?
I haven’t yet got around to this; I am deep in a project at the moment, and need to use the machine; I can tinker later (maybe March, maybe summer).
Life, work, other projects…
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I did this conversion, inspired by this thread (kudos to @md8n for designs and 3d files)
I went with 600W ER16 collet version (9k rpm max). Used @m8n’s sleeve file with some modifications. I had to abandon the outer/inner sleeve approach and go with a single sleeve instead, as the inner sleeve walls would have been too thin. I also adjusted the sitting depth.
The PLA version cracked immediately when I tried to fit the spindle Spidnle’s diameter is slightly larger at the ends compared to the central body and you have to forcedly squeeze it in. I had to reprint it in PETG.
Printed out the supports, everything fits perfectly. However, the PLA feels a bit brittle. I haven’t tested the supports in PETG yet, but I’m curious if a more robust design would help.
Packed everything into the first suitable electrical box I found at the store.
So far, it works well! 
Overall, the total cost is about the same as a DeWalt router here in the EU. The spindle is relatively quiet, and having 0-9000 RPM speed control is nice. However, I’m not sure if 9000 RPM is enough. I’ve only run a few jobs so far, using a 2mm single-flute bit at a 900mm/min feed rate (which is quite slow), and at ~9300 RPM, I’m already getting chips instead of dust.
This suggests that if I want to speed up to 1800mm/min (which Maslow seems capable off) I’ll need a higher RPM. I’ll probably have to switch to two-flute bits.
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what size bit are you using? a smaller bit will need higher rpm or more flutes