<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:st1="urn:schemas-microsoft-com:office:smarttags" xmlns="http://www.w3.org/TR/REC-html40"> <head> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii"> <meta name=Generator content="Microsoft Word 11 (filtered medium)"> <o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="PostalCode"/> <o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="State"/> <o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="City"/> <o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="place"/> <o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="PersonName"/>  <style>  </style>  </head> <body bgcolor=white lang=EN-US link=blue vlink=purple> <div class=Section1>     I'm quite certain that neither the hammers nor rep. levers are pinned too tightly, and I know the drop is only 1/8" or less <o:p></o:p> <o:p> </o:p> <o:p> </o:p> 1/8 inch is a generous drop. I like to set for minimal drop. Seems to me like every time I used to have trouble getting hammers to rise either my drop was lower than I thought it was or the checking was too high. <o:p></o:p> <o:p> </o:p> Did you bench regulate or in the piano? If on the bench I’d be very suspect of your settings, particularly letoff and drop (unless you use the Spurlock tool illustrated below). <o:p></o:p> <o:p> </o:p> Set your letoff on a sample note in the piano- C4 would be a good one. Set it to the thickness of the string, or about 1 mm (it helps sometimes to shine a flashlight across the strings. Pull the action and reset the drop on that C4. Hold down B3 so you can have a visual reference. Set the drop within 1 mm (1/32”) of your let off. Now check your hammer rise.<o:p></o:p> <o:p> </o:p> <o:p> </o:p> I really like the Spurlock regulating jig. Set the letoff on the end notes of each section, then it’s a snap to do the rest and letoff on the bench. <a href="http://www.spurlocktools.com/id24.htm">http://www.spurlocktools.com/id24.htm</a><o:p></o:p> <o:p> </o:p> You set the height of the jig so the end notes just barely click against the rail at let off. Then set every other note in the section so they also just barely click.<o:p></o:p> <o:p> </o:p> For drop hold the key down and turn the screw up until the hammer barely comes off the jig rail. That is drop set to the letoff height. Turn screw down slightly so hammer is back on rail and your drop is now set to just below letoff (assuming you have key dip set on the bench to match what it is in the piano). <o:p></o:p> <o:p> </o:p> <![if !vml]><img width=324 height=243 src="cid:image001.jpg@01C8CD30.51E75AE0" align=left hspace=12 alt="let-off jig in use" border=0 v:shapes="_x0000_s1026"><![endif]><o:p></o:p> <o:p> </o:p> <o:p> </o:p> <o:p> </o:p> <o:p> </o:p> <o:p> </o:p> <o:p> </o:p> <o:p> </o:p> <o:p> </o:p> <o:p> </o:p> <o:p> </o:p> <o:p> </o:p> <o:p> </o:p> <o:p> </o:p> <o:p> </o:p> <o:p> </o:p> <![if !vml]><img width=288 height=251 src="cid:image002.jpg@01C8CD30.51E75AE0" align=left hspace=12 alt="let-off jig" border=0 v:shapes="_x0000_s1027"><![endif]><o:p></o:p> <o:p> </o:p> <o:p> </o:p> <o:p> </o:p> <o:p> </o:p> <o:p> </o:p> <o:p> </o:p> <o:p> </o:p> <o:p> </o:p> <o:p> </o:p> <o:p> </o:p> <o:p> </o:p> <o:p> </o:p> <o:p> </o:p> (pictures from Spurlock’s website)<o:p></o:p> <o:p> </o:p> <o:p> </o:p> <o:p> </o:p> <o:p> </o:p> Pull the jig, rough in checking and repetition spring tension and that section is well on the way to being regulated. <o:p></o:p> <div> Dean<o:p></o:p> <u1:PERSONNAME u2:st="on">Dean May</u1:PERSONNAME>             cell 812.239.3359 <o:p></o:p> PianoRebuilders.com   812.235.5272 <o:p></o:p> <u1:PLACE u2:st="on"><u1:CITY u2:st="on"><st1:place w:st="on"><st1:City w:st="on"><u3:place u4:st="on"><u3:City u4:st="on">Terre Haute</st1:City></u3:place></u1:CITY></u3:City> <u1:STATE u2:st="on"><st1:State u5:st="on"><st1:State w:st="on">IN</st1:State></u1:STATE></st1:State>  <u1:POSTALCODE u2:st="on"><st1:PostalCode u6:st="on"><st1:PostalCode w:st="on">47802</st1:PostalCode></u1:POSTALCODE></st1:PostalCode></st1:place></u1:PLACE><o:p></o:p> </div> <o:p> </o:p> <div> <div class=MsoNormal align=center style='text-align:center'> <hr size=2 width="100%" align=center tabindex=-1> </div> From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On Behalf Of David Nereson Sent: Friday, June 13, 2008 2:18 AM To: <st1:PersonName w:st="on">Pianotech List</st1:PersonName> Subject: no hammer rise<o:p></o:p> </div> <o:p> </o:p> <div> Thanks for all the responses.  The action has been completely regulated and everything is as it should be except the hammer rise.  <o:p></o:p> </div> <div>     Got busy all the sudden and haven't had time to double-check the things in your responses (I don't have the piano in my shop), but will soon.<o:p></o:p> </div> <div>     I'm quite certain that neither the hammers nor rep. levers are pinned too tightly, and I know the drop is only 1/8" or less.  Even when the rep. springs are compressed to their max. (made strongest), there's still no rise.  <o:p></o:p> </div> <div>     I'll have to check the backchecks again, but I know checking distance is in the right neighborhood.  <o:p></o:p> </div> <div>     Thanks.  <o:p></o:p> </div> <div>     --David Nereson, RPT <o:p></o:p> </div> </div> </body> </html>