@Vince.Fab so, I connect red and black to the power supply. What about the yellow? Just leave it there?
@griff âASâ to positive as well sir.
The max speeds and feeds on the TAS will largely depend on your machine and setup ridgidity. I run close to 2000sfm on 1/4 and 2300sfm on 3/8s with microdrop ensuring lubrication and heat management. Usually run a minimum of ipm of 150-175 and 1.7-2.4 on the modded s3. Manufacturer recommends a 3 thou chip but we cant go that hard lol.
On a stock s3 Iâll keep it at 75ish ipm and 1.3-1.7 thou chipload to keep chatter under control.
@WillAdams imo it would be more effective adding a 5th bearing support to counteract leverage. I know Iâve had quite a bit of luck with that method. Thinking about trying a different style linear rail.
Im trying to get an electrician in here today to measure voltage and amp draw.
2 Likes
@Vince.Fab. Ok, cool.
I donât know if youâve noticed from my pics that I have an hdz, albeit home made from @Lukeâs plans.
Right now Iâm chasing down some chatter in +Y adaptive, 10mm doc, 0.3 load, 1500 mm/min, 24,000 rpm. When I get that fixed Iâll chop up some ali with the AC Makita to get a baseline then compare to DC performance.
Maybe if we both work on the same parts, toolpaths weâll learn more? I know I will, haha!
So your router speed is 30,000 RPM for 1/4" and 24,000 RPM for 3/8"? Wouldnât your chipload with the 1/4" cutter then be 0.83 - 1.04 mils? What depth of cut do you use for each machine when slotting? Are you cutting 6061 T-6 aluminum? Are Lakeshoreâs speeds and feeds for the usual DOC = endmill diameter?
https://share.icloud.com/photos/0OzZA_b1Hn2x1AMmY1hR2MaKw
I wonder if this link will work?
All connected up, ran it briefly on a 6S (22v) LiPo. Stay tuned
This link shows router at full power. Now if only I had a watt meter 
https://share.icloud.com/photos/0ODwB2ZGcsd1Q-wzj7zHxfDVA#Home
Oops, amateur day, hit slow mo
2 Likes
Griff is thatâs a 3/8s running I would say you are playing with fire at that chipload, looks like 0.83 thou. At 24k rpm surface speed is already a little over max recommended. If you dont take a big enough chip it wont take the heat with it, and melting AL to your brand new TAS isnât good lol. If you have a test part Iâll gladly put some hours into machining so we can compare. I doubt you want to machine my parts lol
@gmack
These are my default TAS settings for modded s3, usually stay within 20% depending on a few factors. I also try to stay away from plunge or full diameter slotting if I can. Usually those are my final contour cuts to free parts from plate so Iâm pretty conservative. Iâll take a 0.015-0.030 full width doc depending on stickout and estimated deflection.
When rpm changes so does travel speed to maintain chipload. 30k rpm on a 0.250 is 1963.5sfm, my goals are to hit 200-220 ipm reliably in the future with a 0.100 DOC after a few more upgrades. Router vibration also plays a role at these speeds. I recommend running through the rpm range unloaded with an rpm meter to find out what your âsmoothâ high speeds are and program to those.
Good thing Iâm practicing in white oak!
1 Like
How are you liking the brushless, Griff?
No experience yet, waiting for power supply.
Power supply received, 24 volt/500 watt. Voltage dialed back to 20 volts.
Material is white oak, TAS 3\8â, depth of cut 7 mm, load 1.5mm
PS cool to touch, Makita slightly warm, 8 minutes to complete cut.
3 Likes
How is the noise levels on these brushless units?
1 Like
The same Iâd guess. 91 dB 2 feet away. 62 dB with door closed, 3 feet away.
1 Like
Acquired for testing and given a quick run down on how to use it. Anyone have any guesses on real life amps/wattage???
2 Likes
Itâll be interesting. I have some 900 kv motors for quad copters that draw 20amps continuous and 40 or more in bursts.
Maybe 15 amps or so? Wild ass guess
1 Like
Canât guess without more details. I.E. material, axial and radial width/depth of cut, spindle speed and feed rate.
Heavier adaptive 25k+, 150+ipm, big chip loads. Iâm going to try to push it as hard as it will take. Havenât broken anything in awhile lol
Thatâs quite a bit of power Griff! I have an E-longboard with a 2.2k that only pulls 30amps maxâŚbut the ESC is also fully programmable
1 Like
Those beer cases are heavy, need some grunt to fly âem around the block.
2 Likes
I think my largest heli runs somewhere around 90 amps peak on 6S 2200. Blade span around a meter across I think? Would hate to get hit by that!!! Bet it would make one heck of a spindleâŚfor about 6 minutes, ha!!!
Dan
1 Like
A little evaluation run in ali. 1â block, 65 mm hole, hmmm I wonder what this is for?
Used a 3/8â TAS for the first time in Ali, then a 250 2 flute generic, both per @Vince.Fab recommendations above for stock Shapeoko.
Router and power supply cool, calm and collected.
3 Likes
This is looking like a very attractive option, I have been eyeing a 1.5kw ER16 Spindle on Ebay, to get the 3/8 collet size. The 18v makita is slightly less in cost, but do you think a speed control could be added to change speed via gcode?
Thanks for sharing your findings guys, awesome for the rest of us!
2 Likes