Difference between revisions of "Shopbot User Tips"
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== Positioning your work == | == Positioning your work == | ||
== Feeds and speeds== | == Feeds and speeds== | ||
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− | + | ===Drilling=== | |
− | + | Cutting Speed [CS] is based on Surface Feet per Minute [FPM or SFM]. | |
− | + | RPM = (Cutting Speed(ft/min) x 12/1(in/fr))/Diameter of Cutter(in) x pi | |
− | RPM = (Cutting Speed(ft/min) x 12/1(in/fr))/Diameter of Cutter(in) x pi | + | RPM = (12CS)/(pixD) |
− | RPM = (12CS)/(pixD) | + | |
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<TABLE> | <TABLE> | ||
<table border="1"> | <table border="1"> | ||
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<CAPTION ALIGN=TOP>Material and Cutting Feed</CAPTION> | <CAPTION ALIGN=TOP>Material and Cutting Feed</CAPTION> | ||
<TR><TD>Material </TD><TD>Cutting Speed (FPM)</TD></TR> | <TR><TD>Material </TD><TD>Cutting Speed (FPM)</TD></TR> | ||
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<TR><TD>Aluminum </TD><TD ALIGN=CENTER>300</TD></TR> | <TR><TD>Aluminum </TD><TD ALIGN=CENTER>300</TD></TR> | ||
</TABLE> | </TABLE> | ||
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<TABLE> | <TABLE> | ||
<table border="1"> | <table border="1"> | ||
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<CAPTION ALIGN=TOP>Drilling Feeds</CAPTION> | <CAPTION ALIGN=TOP>Drilling Feeds</CAPTION> | ||
<TR><TD>Drill Dia.(in)</TD><TD>Feed per Revolution(in) </TD></TR> | <TR><TD>Drill Dia.(in)</TD><TD>Feed per Revolution(in) </TD></TR> | ||
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</TABLE> | </TABLE> | ||
− | Example | + | Example: |
− | + | 1/2 in drill, Low Carbon Steel | |
− | 1/2 in drill, Low Carbon Steel | + | |
− | + | Dia = 0.50 | |
− | Dia = 0.50 | + | Material LCS : 90 |
− | Material LCS : 90 | + | |
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RPM = 12CS/pi*D = 12*90/.5pi = 2160/pi = 687.5<br> | RPM = 12CS/pi*D = 12*90/.5pi = 2160/pi = 687.5<br> | ||
Feed = .004-.007<br> | Feed = .004-.007<br> | ||
<TABLE> | <TABLE> | ||
<table border="1"> | <table border="1"> | ||
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<TR><TD>Answer:</TD><TD>687.5 RPM </TD></TR> | <TR><TD>Answer:</TD><TD>687.5 RPM </TD></TR> | ||
<TR><TD> </TD><TD>.004-.007 in. per Rev</TD></TR> | <TR><TD> </TD><TD>.004-.007 in. per Rev</TD></TR> | ||
</TABLE> | </TABLE> | ||
− | + | ===REAMING=== | |
− | + | Speed - 1/2 - 1/3 the speed for drilling | |
− | + | Feed - 2-3 times the feed for drilling | |
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+ | ===MILLING=== | ||
+ | RPM = (12CS)/(pixD) | ||
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Feedrate = RPMxfxn<BR> | Feedrate = RPMxfxn<BR> | ||
n = number of teeth<BR> | n = number of teeth<BR> | ||
f = feed per tooth<BR> | f = feed per tooth<BR> | ||
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<TABLE> | <TABLE> | ||
<table border="1"> | <table border="1"> | ||
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<CAPTION ALIGN=TOP>Cutting Speed</CAPTION> | <CAPTION ALIGN=TOP>Cutting Speed</CAPTION> | ||
<TR><TD>Drill Dia.(in)</TD><TD>Feed per Revolution(in) </TD></TR> | <TR><TD>Drill Dia.(in)</TD><TD>Feed per Revolution(in) </TD></TR> | ||
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<TR><TD>Medium Alloy Steel </TD><TD>40-70 </TD><TD>150-350 </TD><TR> | <TR><TD>Medium Alloy Steel </TD><TD>40-70 </TD><TD>150-350 </TD><TR> | ||
<TR><TD>Stainless Steel </TD><TD> 30-80 </TD><TD>100-300 </TD><TR> | <TR><TD>Stainless Steel </TD><TD> 30-80 </TD><TD>100-300 </TD><TR> | ||
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<TABLE> | <TABLE> | ||
<table border="1"> | <table border="1"> | ||
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<CAPTION ALIGN=TOP>Feeds for End Mills (feed per tooth)</CAPTION> | <CAPTION ALIGN=TOP>Feeds for End Mills (feed per tooth)</CAPTION> | ||
<TR><TD>Cutter</TD><TD>Al. </TD><TD>Brass</TD><TD>Bronze</TD><TD>Cast </TD><TD>Low </TD><TD>Med </TD><TD>High </TD><TD>Stainless</TD><TR> | <TR><TD>Cutter</TD><TD>Al. </TD><TD>Brass</TD><TD>Bronze</TD><TD>Cast </TD><TD>Low </TD><TD>Med </TD><TD>High </TD><TD>Stainless</TD><TR> | ||
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Example - 0.50 in HSS two flute end mill cutting aluminum<BR> | Example - 0.50 in HSS two flute end mill cutting aluminum<BR> | ||
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RPM = 12CS/piD = 12x300/.5pi = 2292 RPM<BR> | RPM = 12CS/piD = 12x300/.5pi = 2292 RPM<BR> | ||
RPM = 12CS/piD = 12x800/.5pi = 6112 RPM<BR> | RPM = 12CS/piD = 12x800/.5pi = 6112 RPM<BR> | ||
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Feedrate = RPMxfxn = 2292x.005x2=23 IPM<BR> | Feedrate = RPMxfxn = 2292x.005x2=23 IPM<BR> | ||
Feedrate = RPMxfxn = 6112x.005x2=61 IPM<BR> | Feedrate = RPMxfxn = 6112x.005x2=61 IPM<BR> | ||
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<TABLE> | <TABLE> | ||
<table border="1"> | <table border="1"> | ||
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<CAPTION ALIGN=TOP>Answer:</CAPTION> | <CAPTION ALIGN=TOP>Answer:</CAPTION> | ||
<TR><TD>RPM Range: </TD><TD>2292 - 6112 RPM</TD></TR> | <TR><TD>RPM Range: </TD><TD>2292 - 6112 RPM</TD></TR> | ||
<TR><TD>Feedrate Range:</TD><TD> 23 - 61 IPM </TD></TR> | <TR><TD>Feedrate Range:</TD><TD> 23 - 61 IPM </TD></TR> |
Revision as of 17:48, 10 February 2016
Post-Processors
When creating toolpaths for the PS1 Shopbot, there are now two distinct options:
- Shopbot TC_PS1(Inch) and Shopbot TC_PS1(mm)
- For general usage of the Shopbot (typically cutting)
- Shopbot TC_PS1-NO_SPIN(Inch) and Shopbot TC_PS1-NO_SPIN(mm)
- For dragging, engraving, and other tasks where the bit (may not actually be a bit) must not spin.
Be careful when creating a toolpath file that you select the right post-processor!
Positioning your work
Feeds and speeds
Drilling
Cutting Speed [CS] is based on Surface Feet per Minute [FPM or SFM]. RPM = (Cutting Speed(ft/min) x 12/1(in/fr))/Diameter of Cutter(in) x pi RPM = (12CS)/(pixD)
Material | Cutting Speed (FPM) |
Low Carbon Steel | 90 |
Alloy Steel SAE 4140 | 50 |
Cast Iron | 70 |
Aluminum | 300 |
Drill Dia.(in) | Feed per Revolution(in) |
under 1/8 | .001 to .002 |
1/8 to 1/4 | .002 to .004 |
1/4 to 1/2 | .004 to .007 |
1/2 to 1 | .007 to .015 |
over 1 | .015 to .025 |
Example: 1/2 in drill, Low Carbon Steel
Dia = 0.50 Material LCS : 90
RPM = 12CS/pi*D = 12*90/.5pi = 2160/pi = 687.5
Feed = .004-.007
Answer: | 687.5 RPM |
.004-.007 in. per Rev |
REAMING
Speed - 1/2 - 1/3 the speed for drilling Feed - 2-3 times the feed for drilling
MILLING
RPM = (12CS)/(pixD)
Feedrate = RPMxfxn
n = number of teeth
f = feed per tooth
Drill Dia.(in) | Feed per Revolution(in) | |
Material | High Speed Steel | Cemented Carbide |
Aluminum | 300-800 | 1000-2000 |
Brass | 200-400 | 500-800 |
Bronze | 65-130 | 200-400 |
Cast Iron | 50-80 | 250-350 |
Low Carbon Steel | 60-100 | 300-600 |
Medium Carbon Steel | 50-80 | 225-400 |
High Carbon Steel | 40-70 | 150-250 |
Medium Alloy Steel | 40-70 | 150-350 |
Stainless Steel | 30-80 | 100-300 |
Example - 0.50 in HSS two flute end mill cutting aluminum
RPM = 12CS/piD = 12x300/.5pi = 2292 RPM
RPM = 12CS/piD = 12x800/.5pi = 6112 RPM
Feedrate = RPMxfxn = 2292x.005x2=23 IPM
Feedrate = RPMxfxn = 6112x.005x2=61 IPM
Cutter | Al. | Brass | Bronze | Cast | Low | Med | High | Stainless |
Dia. | ---- | ----- | ------ | Iron | Carbon | Carbon | Carbon | Steel |
------ | ---- | ----- | ------ | ----- | Steel | Steel | Steel | --------- |
1/8 | .002 | .001 | .0005 | .0005 | .0005 | .0005 | .0005 | .0005 |
1/4 | .002 | .002 | .001 | .001 | .001 | .001 | .0005 | .001 |
3/8 | .003 | .003 | .002 | .002 | .002 | .002 | .001 | .002 |
1/2 | .005 | .003 | .003 | .0025 | .003 | .002 | .001 | .002 |
3/4 | .006 | .004 | .003 | .003 | .004 | .003 | .002 | .003 |
1 | .007 | .005 | .004 | .0035 | .005 | .003 | .003 | .004 |
1 1/2 | .008 | .005 | .005 | .004 | .006 | .004 | .003 | .004 |
2 | .009 | .006 | .005 | .005 | .007 | .004 | .003 | .005 |
RPM Range: | 2292 - 6112 RPM |
Feedrate Range: | 23 - 61 IPM |