|
Post by Bruce on Sept 7, 2018 17:52:28 GMT
|
|
|
Post by Derek the Admin on Sept 7, 2018 19:01:46 GMT
Thanks for sharing your info James.
SFM is important, but more so in various metals.
I actually urge you to avoid industrial chip load charts. For instance, Harvey tool recommends a 0.002" chipload for aluminum with a 1/4" end mill. That's going to result in too much on the M3 and Carve King in my opinion for most practical cut depths. That's a great chipload for an industrial mill, but not for a hobby level machine.
|
|
|
Post by jamesterm on Sept 7, 2018 20:24:55 GMT
Thanks for sharing your info James. SFM is important, but more so in various metals. I actually urge you to avoid industrial chip load charts. For instance, Harvey tool recommends a 0.002" chipload for aluminum with a 1/4" end mill. That's going to result in too much on the M3 and Carve King in my opinion for most practical cut depths. That's a great chipload for an industrial mill, but not for a hobby level machine. Derek Ok, I see what you mean, so for this app is it possible to have some recommended speed ranges to use per material as well? Approaching this calculator from a new person looking at it: I know what material to select, but I don't know what speed I'm suppose to use... I also don't know what bit diameter to use. If I know the SFM, I could work out both answers, if the SFM from Harvey tools can be used (and *only* the SFM) that would be helpful to know as well. Thanks.
|
|
|
Post by Bruce on Sept 9, 2018 12:30:08 GMT
The bit diameter will be based on the job your work piece requires. If you are doing a rough cut of a profile or pocket typically you would use a larger bit. Smaller bits are used for finer details like finishing cuts. Ultimately you learn this as you go. You will find what works for you with your work flow and types of projects.
When starting to run a project I always set a higher feed rate in the G-Code and then back it down in the G-code sender to 50% just to be sure everything looks good. Then I crank up the feed rate a little at a time as the project is running. I may go over my programmed feed rate also. It's kind of a play by ear thing (using a musical metaphor). It's not set in stone and can be adjusted in real time in the G-code sender.
The feed and speed charts will get you in the ballpark but you need to run it and see how it works for you.
|
|
|
Post by jamesterm on Sept 9, 2018 19:44:42 GMT
The bit diameter will be based on the job your work piece requires. If you are doing a rough cut of a profile or pocket typically you would use a larger bit. Smaller bits are used for finer details like finishing cuts. Ultimately you learn this as you go. You will find what works for you with your work flow and types of projects. When starting to run a project I always set a higher feed rate in the G-Code and then back it down in the G-code sender to 50% just to be sure everything looks good. Then I crank up the feed rate a little at a time as the project is running. I may go over my programmed feed rate also. It's kind of a play by ear thing (using a musical metaphor). It's not set in stone and can be adjusted in real time in the G-code sender. The feed and speed charts will get you in the ballpark but you need to run it and see how it works for you. Thanks for the tip on the 50% method... I was painfully making shallow passes 0.5mm depth cuts on the polycarbonate material last night on the slowest speed 16000 rpm. The chart says I can use 1.65-2.2mm for an 1/8" bit, but it was too much to handle. I believe I could have kept the deeper cuts and used this technique to fine tune the feed. I'm guessing my router speed should probably be influenced by the SFM suggested for the material. I see what you mean by the smaller bits for finer detail.
|
|
|
Post by jamesterm on Sept 10, 2018 14:37:43 GMT
Hey guys... so I'm trying to work out the math... let me know how accurate this is.
The problem: What speed to I use on my router for 5052o aluminum, and then use the calculator here for the RPM and feed.
Ok here it goes:
Trying to find ideal router setting for 5052o Aluminum:
Material spec for harder aluminum from harvey tool:
Aluminum 800-1500
Let's try the midpoint of 1100
(3.82 * 1150) / 0.25 = 17572.0 <--rpm
The router has dial range of 0-6,
Dial=(RPM-16000)/(5500/3)
since we have a flexible SFM lets figure out where 17572 is
(17572-16000)/(5500/3) = 0.857
and round it up so that I can just adjust to a number... in this case where is 1x
solve([2 =(x-16000)/(5500/3)], [x]) = 19666.666;
Ok we'll use RPM 19666... just curious what is this SFM
solve([19666 = (3.82 * x ) / 0.25], [x])=SFM 1287
Ok so using 1x setting on the router with 19666, now onto the calculator:
But I'll do it by hand here since I have the table already.
I want to do a rough cut using 1/4 end bit.
the table on this is as follows:
1/4 chipload=0.0279mm depth cut=0.4445mm-0.5925
I need to convert this to inches
Chipload=0.0010984
With chipload and RPM I can now compute the feed
IPM = RPM x IPT x T
GLOSSARY
SFM - Surface Feet per Minute
RPM - Revolutions per Minute (Speed)
IPT - Inches Per Tooth (Chip Load)
IPR - Inches Per Revolution
IPM = Inches Per Minute (Feed)
D - Cutter Diameter
T - Number of Teeth
Feed=43.2
Router=1x
depth=0.02 (will manually slow down feed and attempt an aggressive deeper cut)
|
|
Catamarack
New Member
Posts: 27
Machine: Power Route
|
Post by Catamarack on Oct 25, 2018 22:06:45 GMT
Nice program, though this appears to be a bit out-dated. Any plans to update it to include the Power Route?
*EDIT: I’m not saying the information is bad, rather it would be nice if the Power Route was included.
|
|
rowiac
Full Member
Posts: 230
Location: California
Machine: M3
|
Post by rowiac on Nov 29, 2018 18:36:35 GMT
So am I missing something? I can't find this app in the Apple App Store. I searched for "millright", "mill right", "CNC", etc. but no luck. It looks like it would be very useful if it's still available.
|
|
|
Post by Big Man Black T-Shirt(Patrick) on Nov 29, 2018 18:42:55 GMT
So am I missing something? I can't find this app in the Apple App Store. I searched for "millright", "mill right", "CNC", etc. but no luck. It looks like it would be very useful if it's still available. Looks like it's been removed. Derek will weigh in soon and sort it out, I'm sure.
|
|
|
Post by jamesterm on Nov 29, 2018 21:22:15 GMT
So am I missing something? I can't find this app in the Apple App Store. I searched for "millright", "mill right", "CNC", etc. but no luck. It looks like it would be very useful if it's still available. I have never tried the app store before... I just go to the site and it still works. On my phone I can use chrome and use www.millrightcnc.info link I have a galaxy 8 droid, so I haven't tested this on an iphone.
|
|
rowiac
Full Member
Posts: 230
Location: California
Machine: M3
|
Post by rowiac on Nov 30, 2018 2:30:51 GMT
I tried www.millrightcnc.info on my PC and my phone, but the app seems like it would be more convenient. I hope it's still available.
|
|
mickv
New Member
Posts: 19
|
Post by mickv on Dec 4, 2018 12:54:31 GMT
Here is the link to the iTunes App. It should work on all iOS devices. If you find any issues, please let us know so I can correct them. version 1.0.2 launched today (10/230 had a few display issues I fixed. Please report back any issues you may find. Here is 1.0.2 in the Google Play Store. Android AppFollowing the link above for the iTunes App, I get a message that the "App is not available in the US store". People clearly are raving abpout it. What am I doing wrong?
|
|
mickv
New Member
Posts: 19
|
Post by mickv on Dec 4, 2018 12:57:00 GMT
Here is the link to the iTunes App. It should work on all iOS devices. If you find any issues, please let us know so I can correct them. version 1.0.2 launched today (10/230 had a few display issues I fixed. Please report back any issues you may find. Here is 1.0.2 in the Google Play Store. Android AppFollowing the link above for the iTunes App, I get a message that the "App is not available in the US store". People clearly are raving abpout it. What am I doing wrong? I see the other links now of people having issues getting the app. If's it's available, please post. thanks
|
|
|
Post by joebob296 on Dec 7, 2018 5:07:40 GMT
If anyone is on Android, and wants it I can pull the .apk file from my phone and upload it here.
On a side note any idea when it will be updated for the Power Route?
|
|
|
Post by Bruce on Dec 19, 2018 23:07:11 GMT
The web link works www.millrightcnc.info/Not sure about the phone app. Looks like it was removed for some reason. But it was the same thing as the webpage just made into a phone app.
|
|