Do you have the user manual?

Don't know the make/model of your machine, but you can search the internet for:

Make + Model + the word "Manual"

or contact manufacturer support.

..

For ANY instruction manual just Google (brand/model) user manual and read download the manual
or
Google (brand) website, and look for Support, Download, Customer Service or Contact Us pages

I’m happy to help further over the phone at https://www.6ya.com/expert/donald_f2ed37026a3ac881

Search the internet for:

Make + Model + the word "Manual"

or contact manufacturer support.

..

ManualsBase com

Manual On PDF

Free Product Manual User Manual Owners Manual Guide

http://www.generalmanual.com/

User Manual Product Guide Download

Free User Manuals and Owners Guides ManualsOnline com

Free Manual Downloads PDF Owner Guides and Technical Specification Manuals...

User Guide Instructions Book Operating Manual Service manual Workshop...

ManualsLib Makes it easy to find manuals online

Search the internet for:
Manufacturer + Model + the word "manual" or "parts"

Parts and service manuals are frequently difficult to find as the manufacturer tends to restrict availability to dealer and service providers. However, sometimes you can get lucky and find one for sale on the internet from a sewing machine parts supplier or even on sites like eBay. Another place to check are sewing machine groups (probably finding one focused on your machine's maker and model era would be the best bet). Check Yahoo Groups for user groups fitting your machine's make & model. Frequently, users will have items that are difficult to find elsewhere.

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JUKI SERVICE MANUAL

dixiesewingmachine.tzo.com/JUKI%20SERVICE.htm

APW-231,232,235,236,239,240 ENGINEER MANUAL.pdf, File, 3.07 MB. APW-297&298EM01_e. ... .pdf, File, 1.08 MB. DMN-530-4 Instruction Manual (No.02) BE5304S0B0A.pdf, File, 777 KB ... DP-2100 EM00_e.doc, File, 67.8 KB. DP-2100

[PDF]HZL-F series - JUKI

https://www.juki.co.jp/household_en/hsm/pdf/f-series_en1209.pdf

any other user servicing adjustments mentioned in the instruction manual. 11. ... can be used on sewing machine model HZL-F300, HZL-F400, or HZL-600.

http://www.manualslib.com/manual/581483/Singer-Touch-And-Sew-758.html

Try looking for a service manual for your machine. Search the internet for:

Manufacturer + Model + the word "manual"

If you are lucky, you may find one but service manuals are difficult to find as manufacturers tend to guard that information from the user.

You may also be able to find a parts diagram or manual for sale from sites such as eBay.

...

Search the internet for:

Manufacturer + Model + the word "Manual"

...

Pinocke1 3 thread no light. Will not cut
fabric may need new cutting blades top
and bottom. Need manual service and user.