Servo motor suited for pneumatic foot lift.

[DanishMan]

Dear Friends

Do any of you have experience in fitting a servo motor to a sewing machine, that has pneumatic foot lift.

If yes, do you have any suggestions for which motor to choose.

Kind regards

DanishMan

[shoepatcher]

The new  servo motors of today only have needle up needle down functions.  I am not talking about an Efka, Mitsubishi or HOsing computer motors.  What I did was get a air assisted pitman rod from Universal Sewing supply in St. Louis.  They manufacture them.   Cost about $60.00US plus shipping.   This lets you run an air line to the machine and hook up to regulator.  From there to the air value on the  pitman rod that is hooked to the motor and  treadle pedal.  You heal back on pedal to activate the value and you have foot lift.  Nice and simple.

glenn

[DanishMan]

Thank you Shoepatcher

[DanishMan]

What is the quality of Ho Hsing? 

Brgds

DanishMan

[shoepatcher]

Not as good as the Efka or Mitsubishi.  However, the conglomerate that owns Durkopp, Adler and Pfaff bought Ho Sing.   They make all the display panels on the Adler machines!   So what does that tell you.?

glenn

[Stuckr]

Hello,  I have a Durkopp 291 I picked up with a blown EFKA control box I replaced it with a HoHsing i70.  It works great with my pneumatic/Electromagnetic controls. (Reverse, Foot lifter, Tension release, Thread cutter, etc)   There are plenty of options on this machine.  The motor is strong enough.   I am overall pretty happy.  One thing I would like to have is a manual with all the functions.  The manual they sent with it only has the basic functions.  I know there are more since I found them by pressing the "P" or "S" button when powering up.  If anyone knows where I can find a manual with all the functions descriptions it would be greatly appreciated.  FYI  I am using the original Knee lifter and the 4 push buttons on the machine just needed to cut off the din plug identify the wires with a multimeterand splice it.      

 

[keithski122]

HoHsing i70 manual, keep scrolling through and its english after the chinese version.

http://www.hohsing.com/download/i70m-manual-tw-en.pdf

http://docs.makini24.ru/Ho-Hsing/Manual_HVP-70-4-ED_2007-01_IMCA.pdf

 

Edited April 25, 2020 by keithski122

[Gregg From Keystone Sewing]

Efka, Ho Hsing, Mitsubishi have a 24V output, that when you heel back on the foot treadle, position D or E, it will lift the foot with the needle in the work with the foot lift or up, and full heel back with needle up and foot lift output.  Usually we would use a solenoid to control the air lifting cylinder or magnetic solenoid for foot lift. With the EB401 control arm as just one example, it's easy to setup the foot pedal for toe down and heel back.

Another way as mentioned by shoepatcher calling it an air assisted pitman rod (good enough for me) is to use the heel action mechanical switch that goes between the motor control arm and foot treadle.  Heel back with actuate the switch and activate the air cylinder for foot lift.  Likewise, we can add for example toe down switch for motor running with compressed air needle cooler if we wanted to.   

Edited April 26, 2020 by Gregg From Keystone Sewing

[Gregg From Keystone Sewing]

21 hours ago, Stuckr said:

Hello,  I have a Durkopp 291 I picked up with a blown EFKA control box I replaced it with a HoHsing i70.  It works great with my pneumatic/Electromagnetic controls. (Reverse, Foot lifter, Tension release, Thread cutter, etc)   There are plenty of options on this machine.  The motor is strong enough.   I am overall pretty happy.  One thing I would like to have is a manual with all the functions.  The manual they sent with it only has the basic functions.  I know there are more since I found them by pressing the "P" or "S" button when powering up.  If anyone knows where I can find a manual with all the functions descriptions it would be greatly appreciated.  FYI  I am using the original Knee lifter and the 4 push buttons on the machine just needed to cut off the din plug identify the wires with a multimeterand splice it.      

 

Ho Hsing IMO is very good quality.  Service and support is strong within the US, and in rare cases that I needed to contact Ho Hsing about technical support, they were very helpful and supportive and took my issues seriously.  English to my benefit is also a strong suit of theirs, no problem communicating back and forth via email.  On thing is that a LOT of their product line is geared toward high speed garment machines and some canvas upholstery type.  They have a few motors that are specific for high torque applications, but I prefer to move to something else for that in most any case. For example, on a high speed overlock, a Ho Hsing motor may be awesome, but terrible for low speed, low torque applications like most folks want to do here, not so great.

Edited April 26, 2020 by Gregg From Keystone Sewing