mcriner
Plastic
- Joined
- Jan 17, 2011
- Location
- Buda, Texas
Anyone else having problems with their newer Haas bar feeder that uses a timing belt? Mine worked till a little past the warranty period and has turned into one PIA since. The issue is the belt slips on the drive pulley. HFO has installed a new belt onto the feeder and has been having the same problem. The belt had a sideways curve to it, looks to me an issue with too much tension and too much torque for the system. It feeds fine for about the first 3 feet of a 4 foot bar and then it looses position by slipping the pulley. The step where is slips is in the pulling the pushrod back. This step the feeder moves at 100% rapid. Is there a way to slow this action down?
There are three permanent fixes to this problem system.
Firstly would be slow the rapid down on the pushrod return. Does not look like this is operator accessible.
Secondly using a bigger pulley on the servo drive motor. Of course this would require a parameter change to the control and I am still not sure that the current timing belt can stand up to the torque for long periods. Probably would still still require slowing of the rapids. Also thought of making the pulley longer, 2" wide instead of 1" and keeping the diameter. The changes that require Haas to change parameters are probably out.
Thirdly would be to replace timing belt with a chain drive. I am slowly thinking that this is the way to go for a bulletproof drive system. I am sure that Haas did not go with a chain is they would have to lubricate it and the timing belt requires none.
This bar feed system should be more robust than what I have encountered. I operate a job shop where we tune 1" dia to 3" in less than 1000 piece orders. Cant imagine using where it ran for long periods without operator intervention.
Any comments would be appreciative. Thanks
There are three permanent fixes to this problem system.
Firstly would be slow the rapid down on the pushrod return. Does not look like this is operator accessible.
Secondly using a bigger pulley on the servo drive motor. Of course this would require a parameter change to the control and I am still not sure that the current timing belt can stand up to the torque for long periods. Probably would still still require slowing of the rapids. Also thought of making the pulley longer, 2" wide instead of 1" and keeping the diameter. The changes that require Haas to change parameters are probably out.
Thirdly would be to replace timing belt with a chain drive. I am slowly thinking that this is the way to go for a bulletproof drive system. I am sure that Haas did not go with a chain is they would have to lubricate it and the timing belt requires none.
This bar feed system should be more robust than what I have encountered. I operate a job shop where we tune 1" dia to 3" in less than 1000 piece orders. Cant imagine using where it ran for long periods without operator intervention.
Any comments would be appreciative. Thanks