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 Additional Proofs that Ramdasias are Chamar - Will post to Chamar discussion page after block has expired 

Glossary of the Tribes and Castes of the Punjab and North West Frontier Province
 By H.A. Rose, IBBETSON, Maclagan  (http://www.archive.org/stream/glossaryoftribes03rose#page/n5/mode/2up, (p148 of the book or P311 of online book) 
He states that ""Just as the Muhammadan Chamar is styled Mochi so that Sikh Chamar is called Ramdasia....""
Panjab castes by Sir Denzil Ibbetson (1916) (http://www.archive.org/stream/panjabcastes00ibbe#page/n7/mode/2up) 
On Page 269, he states: ""Similarly, if the Ramdasias do not follow the occupation of Chamars, it is no reason to separate them from that castes. So if a Ramdasia is Julaha, that is a weaver, and if he is 'Bazzaz' that is a draper, his caste remains unchanged. If a Chamar, a leather-worker becomes a Sikh and receives 'pahul' to-day, he at once joins the Ramdasias. The Ramdasias do receive the daughters in marriage of ordinary Chamars, but give them 'pahul' before associating with them"".........""The the Ramdasi is still a Chamar"". 
On page 300: 
""The Sikh Chamar or Ramdasia. — It will be seen from Table VIII A that in the north and centre of the Eastern Plains a very considerable number of Chamiirs have embraced the Sikh religion. These men are called Ramdasia after Gui-u Ram Das, though what connection they have with him I have been unable to discover. Perhaps he was the first Guru to admit Chamars to the religion. Many, perhaps most of the Ramdasia Chamars have abandoned leather-work for the loom ; they do not eat carrion, and they occupy a much 
higher position than the Hindu Chamars, though they are not admitted to religious equality by the other Sikhs. The Ramdasia are often confused with the Raidiisi oi Rabdasi Chamars. The former are true Sikhs, and take the pdhul. The latter are Hindus, or if Sikhs, only Nanakpanthi Sikhs and do not take the pcikul ; and are followers of Bhagat Rav Das or Rab Das, himself a Chamar. They are apparently as true Hindus as any Chamars can be, and are wrongly called Sikhs by confusion with the Ranidasias"".

The Religious Life of India - The Chamars by G.W Briggs ISBN: 8175361840 (Available on google books)
On page P.28"", the various subcastes of chamars originated due to different occupations. Quote: ""The Chandar does not tanning and is the highest of the subcastes"".....""The Ramdasi is a weaver""...""The Bonas are weavers of blankets who are Sikhs"".

The Chamar Castes of Punjab

In Punjab, the Chamar is known as Adharmi, Chamar, Jatia Chamar, Rehgar, Raigar, Ramdasia, Ravidasi

(Source: THE CONSTITUTION (SCHEDULED CASTES) ORDER, 1950](C.O.19) (http://lawmin.nic.in/ld/subord/rule3a.htm)

(Source:List of notified Scheduled Castes: http://www.censusindia.gov.in/Tables_Published/SCST/SC%20Lists.pdf
Chamar Castes of Delhi

In Delhi, the chamar is known as CHAMAR, CHANWAR, CHAMAR, JATYA OR JATAV,CHAMAR MOCHI, RAMDASIA, RAVIDASI, RAIDASI,REHGARH OR RAIGAR

(Source:LIST OF SC/ST UNDER GOVT. OF NCT OF DELHI) http://dcnorth.delhigovt.nic.in/SC%20List.pdf

Chamar Castes of Jammu & Kashmir

Chamar Castes of Jammu & Kashmir

The Chamar is known as Chamar or Ramdasia
- (Source:The Constitution ( Jammu & Kashmir) Scheduled Castes Order, 1956) http://www.censusindia.gov.in/Tables_Published/SCST/SC%20Lists.pdf

Dalits and the Emancipatory Sikh Religion Raj Kumar Hans from History department of MS University of Baroda
(Based on a Draft Paper presented at University of Pennsylvania at the Conference on Dalit Challenges to Academic Knowledge: The Great Paradoxes) http://punjabpanorama.blogspot.com/2009/06/dalits-and-emancipatory-sikh-religion.html

""Another dalit Naxalite poet Lal Singh Dil was born in a Ramdasia Sikh (Chamar) family in 1943.""

On Poet Lal Singh Dil  http://apnaorg.com/articles/nirpuma-4/

Born to a low-caste Ramdasia Chamar (tanner) family, Dil was the first of his clan to pass Class X, while doing his daily labour, and go to college. 

Scheduled Castes in Sikh Community A Historical Perspective by Harish K Puri  http://www.sikhspectrum.com/112007/scheduled.pdf

In the customary scheme, outcastes such as mazhabis (Churah Sikh), balmikis and ramdasias (chamar Sikh)/ravidasias were not
allowed to own land.

Perspectives on Sikh Studies by Jagjit Singh (1985, published by Guru Nanak Foundation, Near J.N.U and Qutab Hotal New Delhi 110 067) http://www.globalsikhstudies.net/pdf/per-sikh-studies.pdf

on Page 75,""The Ramdasia's or the Sikh Chamars occupt a much higher position than the Hindu Chamars"