Welding of pads to base for soft foot correction
Welding of pads to base for soft foot correction
(OP)
Guys,
During leveling adjustment of one motor we found difficulty to obtain acceptable motor’s soft foot(less than 0.05mm)we are getting 0.2mm soft foot due to in flat base support. The contractor/Vendor recommended Welding of pads(5-6mm thickness) to base for soft foot correction(see attached photo) . Is it acceptable solution for elimination of soft foot?
During leveling adjustment of one motor we found difficulty to obtain acceptable motor’s soft foot(less than 0.05mm)we are getting 0.2mm soft foot due to in flat base support. The contractor/Vendor recommended Welding of pads(5-6mm thickness) to base for soft foot correction(see attached photo) . Is it acceptable solution for elimination of soft foot?





RE: Welding of pads to base for soft foot correction
You (or the vendor) wants to weld pads on the mounting base, and not of the feet of the motor itself?
Is the base not stable enough by itself? because even with all the padding you might install, you will still need to perform finetuning the alignment.
How do you make perform the alignment? by inserting shims under the feet?
RE: Welding of pads to base for soft foot correction
It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)
RE: Welding of pads to base for soft foot correction
RE: Welding of pads to base for soft foot correction
Is that picture your actual installation?
So some of the pads will be welded to the base with the intent of having the top surface horizontal, which the handsome stamped base's top surface is NOT ? Will there be shims under the welded plates to set them level?
RE: Welding of pads to base for soft foot correction
My question is acceptable solution for soft foot elimination??
RE: Welding of pads to base for soft foot correction
and if not done with proper consideration make things worse. do they plan to just edge weld or drill holes and have welds on the inside. will there be a post "in place" grinding to restore flatness
my "guess" is that the thick shim is not flat. having them ground would be a solution and then spot hone the base plates to achieve the best blue contact (>70%) with a KNOWN flat plate.
there was a recent post concerning the number of thin shims that should be used due to the accumulation of flatness tolerance and resulting soft foot.
RE: Welding of pads to base for soft foot correction
RE: Welding of pads to base for soft foot correction
One can not see the total installation and thus making comments on design and corrections without knowing is not good. I once got drug into a problem with a large motor installation that used I beams to mount the driver and driven. cutting to the jeast of a very long story the problem was the unlevel/poor support of the beams on the factory floor and the lack of a desinated mounting base. (sort of what I think I see in the photo)
while I fear making any more comments due to lack of total information, maybe the structrual frame does need to have design base plates installed by through welding including multiple internal locations THEN the four base plates will need to be surfaced ground to restore/ensure their flatness and parerrelism with the driver/driven center line.