Multi-Link Magnet Device with Electromagnetic Manipulation System for Assisting Finger Movements with Wireless Operation
Round 1
Reviewer 1 Report
The paper focuses on the design of electromagnetic actuation for hand rehabilitation. The subject is interesting and the work is well presented.
I have some minor comments to improve clarity here and there.
1) English form: a few points, such as:
1a) line 30: is the most
1b) Title of Sec. 2.3. missing "the": ... of the ...
2) Line 67. Line 67. Not clear what -25 to 25 A refers to. Later at line 124 you mention again this 25A in relation to the driving coil. Maybe here is too early and you lack of context.
The whole part between approx lines 63 and 73 is too specific for the Introduction; if you want to use it, please, give and explain the details, maybe better using figures and keep in mind that this is the Introduction,
One thing missing at the end of the Introduction is the organization of the paper: which sections, what they speak of.
3) Line 117-118. Why you speak of 3 mm when the diameter of the container is 9 mm?
4) Sec. 2.3 and General. You focus on a +/- 25 current, without controlling its amplitude, as it is applied through a relay. Please, could you clarify how you control the intensity of the force? Later, at line 227, you speak of "up to 25A" and you refer also to 16A. So it is a bit confusing.
Could you please clarify these detail at the earliest in your paper so the Reader (as the undersigned) does not miss this important part?
A control and supply schematic is missing, so it is not clear how the driving coil is fed (a relay, a converter, an amplifier ...) and how that current is controlled.
4) References (suggestion). You might have a look at the following references that you may discuss in your Introduction:
- Special Issue "Advances in Technological Rehabilitation"o Applied Sciences (https://www.mdpi.com/journal/applsci/special_issues/Technological_Rehabilitation);
- "Assist-As-Needed Exoskeleton for Hand Joint Rehabilitation Based on Muscle Effort Detection" ( https://doi.org/10.3390/s21134372) ;
- "A Case Study on the Design and Implementation of a Platform for Hand Rehabilitation" (https://doi.org/10.3390/app11010389) ;
- "A Hand Motor Skills Rehabilitation for the Injured Implemented on a Social Robot" (https://doi.org/10.3390/app11072943)
Author Response
We thank the Referee for his continued interest in our work and helpful comments that will greatly improve the manuscript, and we have tried to do our best to respond to the points raised
Author Response File: 
Author Response.pdf
Reviewer 2 Report
This manuscript is a follow-up of the authors’previous study, which focused on the evolution of the wireless driving system. The authors gauge the performance of their setup using simulations and experiments. By sensing the position of the hand, the developing control system automatically alters the driving coil or the current phase to cause a magnetic field acceptable for the flexion or extension of the hand in the specified location. This manuscript is not suitable for publication because it is in need of major revision mainly due to the following:
The authors did not analyze torque in the manuscript.
In line 79, the authors should describe that the “negative driving current” is used by the finger extension method.
The English quality of the manuscript is not acceptable for formal writings. There are numerous grammatical errors in the manuscript.
In Fig. 2 the terms “l1” to “l6” should be labeled. In 2(c), the units for current, angle, time are missing.
In Fig. 6, it is difficult to distinguish whether the motion trajectory corresponds to the black line or the red line. In Fig. 6 (b3), (d1), (d4), (d 12), the trajectories of motions do not correspond with the data shown on the panel in the right.
Author Response
We thank the Referee for his continued interest in our work and helpful comments that will greatly improve the manuscript, and we have tried to do our best to respond to the points raised.
Author Response File: Author Response.pdf
