H-M Supporter - Silver Member
H-M Supporter - Silver Member ($10)
- Mar 26, 2018
I appreciate that! The spindle motor does seem very slow to react when a load is applied, and I noticed that even before it was CNCd. Taking manual cuts with the motor pulleyed in its stock configuration, it would still take a second to ramp up the torque. I am hoping that the new motor solves those problems. I know that the currently spindle isn't straining with those light cuts though. Most of them were under .25 WOC, .05 DOC, and 35 IPM which is only .4375 in^3/min. It managed 1.25" WOC, .05" DOC, at 52 IPM which is 3.1875 in^3/min which is 7x the cut. After that the belt slipped, but the motor was still pushing.I'm impressed! You can certainly hear it bog down at the start of the cut, but it really moves some material. I'm excited to see how your ATC turns out! We might have to exchange notes!
I will have a few questions about the programming, since I think you mentioned you already did that part.
I agree completely. The new spindle motor is a servo, so in theory it should catch up faster.I think the motor bogging down has more to do with the control electronics than the motor horsepower. It takes the slow control loops in the stock motor electronics a bit of time to "catch up" when a load is applied. Not sure there is much to be done about that.
The software to control the ATC isn't too bad. Are you running Mach 3?
Just watched your video. Good looking stuff you got going on there. Who's cutter is that 5/8 2 insert endmill?I recorded the machine making a few cuts. Most of them are pretty light, but it should give you an idea how it is running.
I usually bump it up to 80-100, but it looks like for that one, I left it at 35, the same as the cutting feed rate. I agree though, it does look like it is cutting faster.Just watched your video. Good looking stuff you got going on there. Who's cutter is that 5/8 2 insert endmill?
Have you tried turning up your non engaged speed when running an adaptive tool path? It almost looks like you're cutting faster than the linking moves.
I appreciate it! Funny that you mention that, I was actually mimicking your mist system, and your post where you saidLooks good, and way nicer than my setup! Again, good work!
I was hoping to avoid the respirator by getting it to run without fog... Does the coolant smoke at all when you are cutting? I need it mostly to keep the chips from sticking to the tool, actually cooling isn't as much of a concern. Does it lubricate the cutter as well as WD-40?Nice work!
Here is the coolant I'm using. https://www.amazon.com/gp/product/B00R9M0110/ref=oh_aui_search_detailpage?ie=UTF8&psc=1
1 gallon should last you quite a while once you get the mister dialed in. The difference between WD40 and coolant is impressive, and I would imagine much better for you lungs! Though coolant is not good to breathe either, so I wear my respirator when running mist.
I have a set of Zenit end mills that use AP?T (I think G but not sure). There is a .75" 3 flute, a .625" 2 flute, a .5" single flute, and a .375" single flute. I snagged the set of 4 of them, plus around 20 inserts for $50 shipped on ebay. They work well for what I do, but I am not sure how they would compare to a shear hog. I want one of those too, but also can't justify spending $240 on a single tool. With the new motor, they are ripping through aluminum pretty hard. The biggest cut I took after getting it set up tonight was 4.35 in^3/min, so at the very least they do as well as the shear hog if you can spin them.NICE WORK!
Which indexable endmill do you use? How does it perform in aluminum? I'd like to use one, but I haven't found something that works well in aluminum and I can't justify the cost of a Tormach shearhog.
I diluted it 10:1, and it seems to be working great. It does lubricate well, and it didn't change the color of my parts. Hopefully I can get the mister dialed to the point that I don't feel like I need to wear a mask, but for now it's not constant enough.I was hoping to avoid the respirator by getting it to run without fog... Does the coolant smoke at all when you are cutting? I need it mostly to keep the chips from sticking to the tool, actually cooling isn't as much of a concern. Does it lubricate the cutter as well as WD-40?
Also, do you dilute it at all before using it? Any discoloration on the part after using it? I can't remember which one it was, but one of the coolants turned aluminum parts brown.
I want to get some real coolant though. The WD40 is just what I have used with a spray bottle for the longest time and I had a gallon jug of it.
I will check it out, thank you for the tip! Their price does not seem at all unreasonable. When I was dialing in my mister, the pressure had to be crazy low to stop the fogging. I think I have it set to 8 PSI on the air line and about 10 PSI on the coolant tank. Even with the air line set to 15 PSI, it would fog like crazy.I diluted it 10:1, and it seems to be working great. It does lubricate well, and it didn't change the color of my parts. Hopefully I can get the mister dialed to the point that I don't feel like I need to wear a mask, but for now it's not constant enough.
Nice work on the motor, I'm very excited by this! I'm glad you're putting it to good use! Those cuts are looking really good, if you gear it down a touch like you were talking about you should find a bit more torque which will help. Of course getting it setup on 240v would be killer. You've really got me thinking about what to do with the other one!
As always, great work!