{"action":"closed","issue":{"url":"https://api.github.com/repos/grbl/grbl/issues/1122","repository_url":"https://api.github.com/repos/grbl/grbl","labels_url":"https://api.github.com/repos/grbl/grbl/issues/1122/labels{/name}","comments_url":"https://api.github.com/repos/grbl/grbl/issues/1122/comments","events_url":"https://api.github.com/repos/grbl/grbl/issues/1122/events","html_url":"https://github.com/grbl/grbl/issues/1122","id":186668274,"number":1122,"title":"time / feed rate ?","user":{"login":"DTLamb","id":23201126,"avatar_url":"https://avatars.githubusercontent.com/u/23201126?v=3","gravatar_id":"","url":"https://api.github.com/users/DTLamb","html_url":"https://github.com/DTLamb","followers_url":"https://api.github.com/users/DTLamb/followers","following_url":"https://api.github.com/users/DTLamb/following{/other_user}","gists_url":"https://api.github.com/users/DTLamb/gists{/gist_id}","starred_url":"https://api.github.com/users/DTLamb/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/DTLamb/subscriptions","organizations_url":"https://api.github.com/users/DTLamb/orgs","repos_url":"https://api.github.com/users/DTLamb/repos","events_url":"https://api.github.com/users/DTLamb/events{/privacy}","received_events_url":"https://api.github.com/users/DTLamb/received_events","type":"User","site_admin":false},"labels":[],"state":"closed","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":3,"created_at":"2016-11-01T22:44:49Z","updated_at":"2016-11-02T16:37:11Z","closed_at":"2016-11-02T16:37:11Z","body":"I have noticed that grbl is moving faster than requested - !?\r\n\r\nExample: \r\nX axis is at X=-80\r\nCommand to move to position X=-81 (1mm of travel) at a feed rate of 1mm/min:\r\nG90 G21 G01 X-81 F1\r\nMove only take ~54 seconds to complete instead of 60 seconds. ?\r\n\r\nI first noticed this for a longer move of 42mm at F1 that was completing several minutes ahead of the instrument that was riding on the x-axis.  Anything that can be done to tighten up the timing?  What parameter/setting am I missing? \r\n\r\nThanks,\r\n\r\nDon\r\n\r\nGrbl 0.9i\r\nArduino Uno\r\nG-shield\r\n\r\n$0=10 (step pulse, usec)\r\n$1=255 (step idle delay, msec)\r\n$2=0 (step port invert mask:00000000)\r\n$3=0 (dir port invert mask:00000000)\r\n$4=0 (step enable invert, bool)\r\n$5=0 (limit pins invert, bool)\r\n$6=0 (probe pin invert, bool)\r\n$10=3 (status report mask:00000011)\r\n$11=0.020 (junction deviation, mm)\r\n$12=0.001 (arc tolerance, mm)\r\n$13=0 (report inches, bool)\r\n$20=0 (soft limits, bool)\r\n$21=0 (hard limits, bool)\r\n$22=1 (homing cycle, bool)\r\n$23=3 (homing dir invert mask:00000011)\r\n$24=25.000 (homing feed, mm/min)\r\n$25=500.000 (homing seek, mm/min)\r\n$26=250 (homing debounce, msec)\r\n$27=1.000 (homing pull-off, mm)\r\n$100=1600.000 (x, step/mm)\r\n$101=800.000 (y, step/mm)\r\n$102=20.000 (z, step/mm)\r\n$110=1000.000 (x max rate, mm/min)\r\n$111=1000.000 (y max rate, mm/min)\r\n$112=500.000 (z max rate, mm/min)\r\n$120=50.000 (x accel, mm/sec^2)\r\n$121=50.000 (y accel, mm/sec^2)\r\n$122=10.000 (z accel, mm/sec^2)\r\n$130=91.000 (x max travel, mm)\r\n$131=56.000 (y max travel, mm)\r\n$132=200.000 (z max travel, mm)\r\n"}}
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