Beginners Guide To Feeds Speeds & Chiploads
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- เผยแพร่เมื่อ 15 มิ.ย. 2024
- Beginners Guide To Feeds Speeds & Chiploads
We give a practical approach to CNC Feeds, Speeds and Chipload. We explain what chipload is, how to read a chipload chart and how chipload can effect your CNC bits and your cutting quality. We also explain a simple way to calculate a starting feed rate based on industry standards and manufacture settings and how to test your feed rates. and get the best possible settings for your CNC maccalculator.
Online Feed rate calc.
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00:00 Introduction
00:48 What is chipload
03:28 How to read a chipload chart
05:54 Understanding manufacture recommendations
07:12 How to calculate chipload
08:59 Test your Machine - แนวปฏิบัติและการใช้ชีวิต
CNC channels much larger than this don’t get it nearly as correct as you. Wow 0.005 for wood (let’s say something like oak or walnut) that’s way low. Like you said, good way to sell bits. So many videos show high rpm and slow feeds. Guys, hot bits break!!! Your approach of averaging is good. I always try to cut at the slowest RPM I can that gives me a clean cut. Heat is the enemy of bits.
Thank you for the response. This was one of the reasons I made this video. I used a thermal temp gun to test the heat coming off of my bits during a cut to figure this all out and it never came close to the manufacture settings. Averaging the information gave me the closest setting to the correct one that I just adopted that method and is the best way I have found to find that number. Appreciate the support.
THANK YOU
finally the most simple and direct answer to the question !!!
Thank you soo much for this info it has helped me lots
Thank you for the super positive feedback. I do appreciate the comments it lets me know these are helping.
I have just started out and this was some of the most useful information i have encountered. thank you.
Thank you. I am glad that helped. I appreciate the feedback as well. Let me know if there is something you would like to hear about more. I enjoy making these.
Thanks very much for this video! As a new CNC hobbyist, I've been trying to make sense of the feeds and speeds stuff not knowing what I didn't know. This video really helps. Now I have an idea of what I'm looking/listening for and how to set up my machine. Subscribed!
@Timberfalls I'm pretty much at square one, so I'll be watching for any instructional sort of videos. As a (retired) PCB designer, I'm familiar/comfortable with gerber, CAD & CAM. I bought a small Longmill to add cnc capability to my workshop with the intention of using it to make small parts. I'm just starting to appreciate how versatile these hobby machines are. 3D carving sounds interesting, and I'd like to see more about that - I'd like to convert my fishfinders' depth contour maps into 3D models. Carveco looks powerful, but I can't justify a subscription for something I might use a couple of times a year. I'm hoping to find some suitable freeware, looking at FreeCAD at the moment. Cheers from Ontario, Canada
This was one of the more succinct but information packed video I've seen in as long time. Thanks so much, my chip load is way too low!
I am glad that helped. Chip load is one of the most misunderstood concepts in CNC operation but once you get it dialed in it makes all the difference in the world.
Jason, you have great in-depth videos! And now you have a new subscriber too! Thanks much!
This is great!
Thank you for a nice video.👍
Great video Jason. I really love your channel!! Thanks for doing a amazing job to help educate the hobbyist cnc community!!
#carveco
Very helpful. Thank you.
Glad that one helped. Make sure and check out the one on best bits too. They can help with these issues as well.
Awesome thank you
Thanks for the feedback and glad that one helped.
Good explanation. Gets confusing with chip load formula and also feed rate formula. But neither take into account the thickness or hardness of the material. 3mm thick Vs 15mm thick, pine Vs oak. I generally listen & feel for good cut sounds. If chatter, Back off feed rate etc
Did you post the link for that site? I’m not seeing it in the description.
Thank you so much for this fantastic information. After watching your video I do have a question: what do you do for those bits that you don't have information on (not to mention the "butter spot" for your spindle)?. I use a 300w spindle with an ER11 chuck and the 1/8th diameter shaft bits (from sainsmart) and there is no speeds and feeds published.
To calculate the speeds and feeds I use Gwizard but don't fully understand the information behind its results to know if they need to be tweeked for these small hobby cncs
Thank you for you response and this is a good question. The chipload chart is designed for most common bits down to around 1/8th in size because below this the chips that are made from the smaller bits have less ability to carry heat and so the chart kind of flattens out here in usefulness. Once you get to the bits that are 1/16 and smaller use a chipload of .001 and a chipload chart for rpms. This will give you the best starting spot for those small bits. As far as the 500watt spindles the butter zone will be different for each manufacture and model but generally they fall close to around 3/4 max output speed. You may have to play around with this to see what chiploads can be achieved by slowly speeding things up after you get a stable baseline. The best thing to do is after a few min of cutting. Pause the project and stop the spindle and see how hot the bit is. If it is too hot to touch then you need to make adjustments. High pitch screeching sounds means the rpms are too high and the feed rate is not fast enough. When you hear bogging down or major vibration from chatter this is when the rpms are too slow and the feed rate is too fast. Hope this helps.
I as other have struggled with feeds and speeds. For some reason i am scared I am going to mess something up if I run a endmill at 251IPM. I also have the Onefinity and I use the Amana 46202-K Down cut for most things and like you said I was running what it was set up at when I loaded the tool base into Carveco. Bits aren't cheap and I haven't really started selling anything yet, so I need my bits to last. You like others have said have explained this better that many others. I think some of us could use some more feeds and speeds videos. I'd like to see you running them, if that makes sense. Again, thanks for sharing!
I think you are right and I need to do another video on this topic. This is one of the videos I get the most questions about and is one of the least understood settings that has the most impact on cut quality. It is essential to have the correct chipload to keep the bit cool. Heat can cause the bit to get dull and cause issues so running the right speeds is pretty important. Not sure if you are a member of the carveco facebook group but there are lots of people there to answer questions and s a great group.
Excellent video, thank you! Where do you get the tool library for Carveco Maker?
Most of those tool libraries come from the different tool manufactures. The one that I use for my tools is just tools I added manually.
Hello, there I love your video❤ I have one question: how did you know/find your router’s butter zone you mentioned? This was intriguing to me
Thank you for the positive feed back I appreciate the support. The makita butter zone was a combination of experience and manufacture test data. Makita had some power band info on the router when it first came out and I used this to dial in the best feed rates and rpms looking for the coolest bit temps.
Can a hobby machine like a long mill,shapeoko, xcarve run fast enough to even matter? Any quality 1/4” end mill is capable to make a pass 1/2” deep at around 300ipm for the proper chip load
Did you mention depth of cut and I missed it? Just wondering because I can run a 0.01" depth of cut at 500ipm however this will just work against the entire advantage of proper chipload by prematurely dulling the very tip of the bit.
Cutting a minimum of 1/2 and ideally the same depth as the dia of the bit is what I try to do. Cutting either conventionally or climb cutting changes a lot of how efficiently the bit cuts. There is a lot that goes into getting feeds and speeds right. The biggest problem is our cnc....hobbyist level cnc are much less forgiving than their industrial counterparts.
Hi Jason, great video very helpful. Tried to use your Feed Rate Calculator but the link doesn't seam to work.
Thanks for letting me know. I just checked the link and it does seem like the link is down. I will have to find another good one like that one and post a link. I
Looks like its up and working again. Here is the link informatyksiedlce.pl/_PROJECTS/feedrate_calc/index.php?lang=en&feedrate=ipm&chipload=in%2Fflute&settings=Save
@@Timberfalls THANK YOU!
Question- why do you say 'RPMs' rather than 'RPM'? The R is 'revolutions' which is already plural. And the M is always singular.
Revolutions per minute (abbreviated rpm, RPM, rev/min, r/min, or r⋅min−1) is a unit of rotational speed or rotational frequency for rotating machines." Technically 'RPM', a measure of rotational speed, never takes a plural in English so saying rpms makes it plural..
@@Timberfalls But it is already plural. As you correctly identify, RPM is short for revolutions per minute- so saying RPMs is saying revolutions per minutes. Which doesn’t make a lot of sense.
@@Tensquaremetreworkshop I learned this terminology in the Marine Corps as a machinist over 20 years ago so its how I have been taught to say it. Its actually a debated topic in English forums. which you can read about here. www.englishforward.com/question/rpms-vs-rpm-1692041932
@@Timberfalls Debated, but they are wrong. Revolution per minute also makes no sense. And a motor would be rated at, say, 3000 RPM. Which is, of course, plural- but never followed by an s. Perhaps better to measure in radians per second…
@@Tensquaremetreworkshop I think when your talking about a complete revolution per minute is only counting the single cycles of spin in a minute and is giving you a singular number to represent those cycles., Radians would be degrees of spin in a minute.
So if the bit is very hot is the feed rate too slow? Mine is extremely hot.
If the bit is very hot the the chip load is off. It can get this way from either direction but usually its from the feed rate being too slow or the rpms too high. The bit is rubbing before it advances far enough to get a bite and the rubbing generates the heat.
@@Timberfalls I believe it may be a little of both. I have the Makita set to around 5 and I'm sure the feed rate is too slow. Thank you for the quick reply.
@@ElCidPhysics90 The butter zone for rpm to hp on the makita is around 2.5 on the dial or 16500rpm. I would recommend slowing the rpms down to this speed and recalculate your chipload using the chipload chart I put in the description. This will get you to a closer starting spot for the testing of your chiploads.
@@Timberfalls thank you. Will do.
@Timberfalls Do you happen to know the butter zone for the Dewalt DWP611? my bits are getting hot and I am not getting the chip size you are. I have tried running a chip load between. 0248 mm and .0468 mm (using a spindle speed between 17k and 19k with feed rate between 1778 mm/min to 900 mm/min) but I stll get hot bits with dust when using a 1/4" downcut bit. I can even smell burning wood at times
18000 is eighteen thousand not 18 hundred