PCB Libraries, Inc. | https://www.pcblibraries.com/Forum/ipc7351-smd-pth-reference-calculators_topic785&OB=ASC_page2.html
: 23 Post Options Post Reply Quote stanleycayochok Report Post Thanks(0) Quote Reply Posted: 15 Feb 2021 at 9:14pm There is a difference on the Smax[RMS
PCB Libraries, Inc. | https://www.pcblibraries.com/Forum/ipc7351-smd-pth-reference-calculators_topic785_page1.html
. I was referring to this Smax[RMS] formula in the 2005 IPC7351, please refer to attached image: In the "SMD Reference Calculator for Excel" the formula is this: New Smax = Smax - (Stol -Stol[RMS])/2
PCB Libraries, Inc. | https://www.pcblibraries.com/Forum/topic785.html
. I was referring to this Smax[RMS] formula in the 2005 IPC7351, please refer to attached image: In the "SMD Reference Calculator for Excel" the formula is this: New Smax = Smax - (Stol -Stol[RMS])/2
PCB Libraries, Inc. | https://www.pcblibraries.com/forum/ipc7351-smd-pth-reference-calculators_topic785&OB=ASC_page2.html
: 23 Post Options Post Reply Quote stanleycayochok Report Post Thanks(0) Quote Reply Posted: 15 Feb 2021 at 9:14pm There is a difference on the Smax[RMS
PCB Libraries, Inc. | https://www.pcblibraries.com/forum/ipc7351-smd-pth-reference-calculators_topic785_post11246.html
. I was referring to this Smax[RMS] formula in the 2005 IPC7351, please refer to attached image: In the "SMD Reference Calculator for Excel" the formula is this: New Smax = Smax - (Stol -Stol[RMS])/2
PCB Libraries, Inc. | https://www.pcblibraries.com/forum/ipc7351-smd-pth-reference-calculators_topic785_post11250.html
. I was referring to this Smax[RMS] formula in the 2005 IPC7351, please refer to attached image: In the "SMD Reference Calculator for Excel" the formula is this: New Smax = Smax - (Stol -Stol[RMS])/2
PCB Libraries, Inc. | https://www.pcblibraries.com/Forum/ipc7351-smd-pth-reference-calculators_topic785_post9685.html
: 23 Post Options Post Reply Quote stanleycayochok Report Post Thanks(0) Quote Reply Posted: 15 Feb 2021 at 9:14pm There is a difference on the Smax[RMS
PCB Libraries, Inc. | https://www.pcblibraries.com/forum/topic785.html
. I was referring to this Smax[RMS] formula in the 2005 IPC7351, please refer to attached image: In the "SMD Reference Calculator for Excel" the formula is this: New Smax = Smax - (Stol -Stol[RMS])/2
PCB Libraries, Inc. | https://www.pcblibraries.com/forum/topic785&OB=DESC.html
. I was referring to this Smax[RMS] formula in the 2005 IPC7351, please refer to attached image: In the "SMD Reference Calculator for Excel" the formula is this: New Smax = Smax - (Stol -Stol[RMS])/2
PCB Libraries, Inc. | https://www.pcblibraries.com/forum/topic551&OB=ASC.html
(IPC-7351B)? I can't get the PCB Footprint Expert result. Gmin=Smax-2*JH-SQRT(Cs^2+P^2+F^2), where Smax=Smin+Stol(RMS); Smin=Lmin-2*Tmax; Cs=Stol(RMS); Stol(RMS)=SQRT[(Lmax-Lmin)^2+(Tmax-Tmin)^2] JH=0 (Nominal Density for 0603 chip component
