Difference between revisions of "Shopbot User Tips"

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(Updates setting up shopbot software to use feed rate information.)
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===MILLING===
 
===MILLING===
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====Spindle Speed====
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'''My speeds aren’t changing on my Spindle when I run the warm-up routine and during cut files. What is the problem?'''
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*Note: On ShopBot desktops and MAX, the RPM must be manually adjusted.
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 +
The Spindle RPM Control window needs to be open in order for the spindle to change speed. If you see this window pop up during the warm-up routine or software start-up, do not close it. To open it manually, type TR in the ShopBot console (the blank box next to the ShopBot CNC logo). Click on RPM to open the fill-in sheet, and make sure that the correct VFD is selected. Start when SB3 start is set to 1, and the Hz scale is set to 60 for a V1000 spindle and to 100 for a 74X spindle.
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The RPM Control window is not available on software versions earlier than 3.6.X.
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Perhaps the fact that this can be done via console means that it could also be added to Gcode files by the post-processor? I'm not really sure. I did just notice this, though, a bit lower down in the FAQ:
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'''I want the RPM Control Window to open every time I start ShopBot 3'''
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This can be accomplished in one of two ways:
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 +
1) ...blah blah blah...
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2) Navigate to C:\Program Files (x86)\ShopBot\Virtual Tools. Open this file with a text
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editor like Notepad or SBEdit. Edit this one line of code:
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VT = Spindle [&R]PM Control, Virtual Tools\Spindle Control\Spindle Control.exe, 0, 0
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Change the last number, which is a zero, to one. It will now look like this:
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VT = Spindle [&R]PM Control, Virtual Tools\Spindle Control\Spindle Control.exe, 0, 1
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Save the file, close and reopen the SB3 software to see the changes take effect.
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'''''This needs to be done only once for your Shopbot login.'''''
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====Recommended Feed and Speed Rates====
 
RPM = (12CS)/(pixD)
 
RPM = (12CS)/(pixD)
  

Revision as of 08:21, 9 November 2017

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 414050
Cast Iron70
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

Spindle Speed

My speeds aren’t changing on my Spindle when I run the warm-up routine and during cut files. What is the problem?

  • Note: On ShopBot desktops and MAX, the RPM must be manually adjusted.

The Spindle RPM Control window needs to be open in order for the spindle to change speed. If you see this window pop up during the warm-up routine or software start-up, do not close it. To open it manually, type TR in the ShopBot console (the blank box next to the ShopBot CNC logo). Click on RPM to open the fill-in sheet, and make sure that the correct VFD is selected. Start when SB3 start is set to 1, and the Hz scale is set to 60 for a V1000 spindle and to 100 for a 74X spindle.

The RPM Control window is not available on software versions earlier than 3.6.X.

Perhaps the fact that this can be done via console means that it could also be added to Gcode files by the post-processor? I'm not really sure. I did just notice this, though, a bit lower down in the FAQ:

I want the RPM Control Window to open every time I start ShopBot 3

This can be accomplished in one of two ways:

1) ...blah blah blah...

2) Navigate to C:\Program Files (x86)\ShopBot\Virtual Tools. Open this file with a text editor like Notepad or SBEdit. Edit this one line of code:

VT = Spindle [&R]PM Control, Virtual Tools\Spindle Control\Spindle Control.exe, 0, 0

Change the last number, which is a zero, to one. It will now look like this:

VT = Spindle [&R]PM Control, Virtual Tools\Spindle Control\Spindle Control.exe, 0, 1

Save the file, close and reopen the SB3 software to see the changes take effect.

This needs to be done only once for your Shopbot login.

Recommended Feed and Speed Rates

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 SteelCemented 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)
CutterAl. BrassBronzeCast Low Med High Stainless
Dia. ---------------Iron CarbonCarbonCarbonSteel
--------------------------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