20 Most Recent Janome D'cor Excel Pro 5124 Mechanical Sewing Machine - Page 2 Questions & Answers

Find your manual here: http://content.janome.com/documents/File/ManualFile/Inst%20book%20MC10000%20book%201.pdf

it will only reverse in straight stitching if it's not reversing at all,I'd return!

here is a link for a manualhttp://www.sewingpartsonline.com/janome-d-cor-excel-pro-5124-sewing-machine-parts.aspx

here is a link for a user manualhttp://www.sewingpartsonline.com/instruction-manual-janome-decor-excel-5018.aspx

Service manuals are not available to the public, only User Manuals

here is a link for a manual to buy or you can try youtube and seeif they have any threading instructionshttp://www.sewingmachinesplus.com/manual-j-5024-en.php

what's the name & model number of the sewing machine?

it's possible that something has happened to some of the gears in the machine& the machine needs to be checked

try rethreading the machinechange the needle--flat side goes to the back of the machinecheck to see if the thread is coming off the thread take up lever when sewingmake sure the thread is not getting caught some where on the machinemake sure the tension is not to tight, usually 3 or 4 is goodclean under the needle plate & in the bobbin area for lint or loose thread

Does it have a stitch length dial which ranges from 4 down to 0 and then into negative numbers? If so, the negative numbers will be reverse stitches. Some machines have this functionality and its very happy for doing mending or stitching in awkward places to sew backwards without having to hold the reverse button. However, if yours is only sewing backwards when stitch length is set to 2, 3 or 4, then its probably a drive problem internally. Don't think your machine has a seperate motor for the feed dogs, probably a gear driven shaft in the free arm.