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Revision as of 11:48, 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 and Cutting Feed
Material	Cutting Speed (FPM)
Low Carbon Steel	90
Alloy Steel SAE 4140	50
Cast Iron	70
Aluminum	300

Drilling Feeds
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

Cutting Speed
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

Feeds for End Mills (feed per tooth)
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

Answer:
RPM Range:	2292 - 6112 RPM
Feedrate Range:	23 - 61 IPM

@@ Line 9: / Line 9: @@
 == Positioning your work ==
 == Feeds and speeds==
-<html>
-<head>
-<title>Cutting</title>
-</head>
-<body>
-<h1>Cutting Speed<br>
+===Drilling===
-<h2>Drilling<Br>
+Cutting Speed [CS] is based on Surface Feet per Minute [FPM or SFM].
-<h3>Cutting Speed [CS] is based on Surface Feet per Minute [FPM or SFM].<br>
+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<br>
+RPM = (12CS)/(pixD)
-RPM = (12CS)/(pixD)<br>
-<BR>
 <TABLE>
 <table border="1">
-<COL width="190">
-<COL width="190">
 <CAPTION ALIGN=TOP>Material and Cutting Feed</CAPTION>
 <TR><TD>Material </TD><TD>Cutting Speed (FPM)</TD></TR>
@@ Line 34: / Line 26: @@
 <TR><TD>Aluminum </TD><TD ALIGN=CENTER>300</TD></TR>
 </TABLE>
-<BR>
-<BR>
-<BR>
 <TABLE>
 <table border="1">
-<COL width="190">
-<COL width="190">
 <CAPTION ALIGN=TOP>Drilling Feeds</CAPTION>
 <TR><TD>Drill Dia.(in)</TD><TD>Feed per Revolution(in)  </TD></TR>
@@ Line 50: / Line 38: @@
 </TABLE>
-Example<br>
+Example:
-<br>
+/2 in drill, Low Carbon Steel
-/2 in drill, Low Carbon Steel<br>
-<br>
+Dia = 0.50
-Dia = 0.50<br>
+Material LCS : 90
-Material LCS : 90<br>
-<br>
 RPM = 12CS/pi*D = 12*90/.5pi = 2160/pi = 687.5<br>
 Feed = .004-.007<br>
 <TABLE>
 <table border="1">
-<COL width="45">
-<COL width="170">
 <TR><TD>Answer:</TD><TD>687.5 RPM </TD></TR>
 <TR><TD>       </TD><TD>.004-.007 in. per Rev</TD></TR>
 </TABLE>
-<H2>REAMING<BR>
+===REAMING===
-<H3>Speed - 1/2 - 1/3 the speed for drilling<BR>
+Speed - 1/2 - 1/3 the speed for drilling
-<H3>Feed   - 2-3 times the feed for drilling<BR>
+Feed - 2-3 times the feed for drilling
+===MILLING===
+RPM = (12CS)/(pixD)
-<H2>MILLING<BR>
-<H3>RPM = (12CS)/(pixD)<BR>
-<BR>
 Feedrate = RPMxfxn<BR>
 n = number of teeth<BR>
 f = feed per tooth<BR>
-<BR>
 <TABLE>
 <table border="1">
-<COL width="190">
-<COL width="190">
-<COL width="190">
 <CAPTION ALIGN=TOP>Cutting Speed</CAPTION>
 <TR><TD>Drill Dia.(in)</TD><TD>Feed per Revolution(in)  </TD></TR>
@@ Line 96: / Line 78: @@
 <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>
 <TABLE>
 <table border="1">
-<COL width="190">
-<COL width="190">
-<COL width="190">
 <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>
@@ Line 118: / Line 95: @@
 Example - 0.50 in HSS two flute end mill cutting aluminum<BR>
-<BR>
 RPM = 12CS/piD = 12x300/.5pi = 2292 RPM<BR>
 RPM = 12CS/piD = 12x800/.5pi = 6112 RPM<BR>
-<BR>
 Feedrate = RPMxfxn = 2292x.005x2=23 IPM<BR>
 Feedrate = RPMxfxn = 6112x.005x2=61 IPM<BR>
@@ Line 127: / Line 104: @@
 <TABLE>
 <table border="1">
-<COL width="190">
-<COL width="190">
 <CAPTION ALIGN=TOP>Answer:</CAPTION>
 <TR><TD>RPM Range:     </TD><TD>2292 - 6112 RPM</TD></TR>
 <TR><TD>Feedrate Range:</TD><TD> 23 - 61 IPM   </TD></TR>