Gritzner Frobana Outsole Machine

[jimi]

great job Alex, well done. your getting nearer to the goal!

[Darren Brosowski]

These machines - in my experience - are very sensitive to tension!

 

[alexitbe]

Hi Darren,

 

Thanks for your response... I have fixed the upper tension issues and am now looking at the shuttle tension problems.

I will order a new shuttle spring and a cheap shuttle alternative from alibaba as Jim suggested.

However, first I will buy some thicker thread and see if the tension spring manages to make some contact.  I am thinking Gutterman Mara 11 (tex265), which says its suitable for 180 nm needles.  If you have any other alternives then I would be happy to try them.

 

Cheers

ALex

Edited July 9, 2017 by alexitbe
numerical error

[LumpenDoodle2]

Enjoying following this thread.  

Great to see people working out ways round the problems of older or more specialised machines.

[alexitbe]

So following SandyT's advice I ordered some thicker thread.   I ordered some polyamide thread (Amanda Ares) size 6 (564tex) and now the shuttle tension is working and is adjustable.  However, the upper thread is not pulling up through the leather.  The website recommends it for needle size 180-220, but I don't think is correct. From the website:

• thread	Thread structure	Breaking force no less than	Recommended nedles	Applications	Beams	Number of pcs in a pack
  Ares 20	470 dtex x 3 141 tex	8600 cN	140-160	For sewing shoes, structural seams	1000m	10
  Ares 10	940 dtex x 3 282 tex	19000 cN	180-200	For ornamental seams	1000m	4
  Ares 8	940 dtex x 4 376 tex	25000 cN	180-200	For ornamental seams	600m	4
  Ares 6	940 dtex x 6 564 tex	34000 cN	180-200	For sewing heavy technical fabrics, leather and ornamental seams.	400m	4

 

So now I have ordered polyamide size 8 (940 dtex x 4 376 tex)  and I hope this will be more suitable for my size 220 nm needle.  We shall see..

 

Thanks for the help so far... We are getting there.

 

For anyone interested in this thread, the website is here.  I got the ares 6 for about 15 euros for 400 m.

http://www.amandathreads.com/industrial-threads-ares.html

Edited July 15, 2017 by alexitbe

[DavidP]

On 7/4/2017 at 4:59 AM, jimi said:

If anyone wants a copy of the manual in English let me know. its too big to upload in PDF or i dont know how to??

I would sure appreciate a copy, leathermoose@yahoo.com

[SenttRox]

Hi,

Can anyone please provide data about the screw on picture?

I think it should be M5x1,25 x ___ ?? mm can anyone confirm?

Thanks

[Gunnarsson]

I have no idea about what it should be, but as 1.25 is the standard pitch on M8 screws I find it unlikely to be used on M5 (that usually has 0.8 pitch, and the thread doesn't look out of the ordinary in the picture). 

[Constabulary]

It is an M6 x 1.0 screw, 33m long shaft with 4.5mm x 15mm end w/o threading - see picture

I have no spare - sorry!

Edited March 26, 2020 by Constabulary

[Gunnarsson]

M6x1 is standard, so it should be relatively easy to improvise something out of a common screw.